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Jose van Dijck (Royal Netherlands Academy of Arts and Sciences (NL))09/04/2018, 08:30
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Stan Bentvelsen (Nikhef National institute for subatomic physics (NL))09/04/2018, 08:40
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Fabiola Gianotti (CERN)09/04/2018, 08:50
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Joshua Thomas Ruderman (NYU)09/04/2018, 09:00
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Michael Benedikt (CERN)09/04/2018, 10:00
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Daniel Schulte (CERN)09/04/2018, 11:00FCC-hh ACC
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Manuela Boscolo (INFN e Laboratori Nazionali di Frascati (IT))09/04/2018, 11:30FCC-ee ACC
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Frank Zimmermann (CERN)09/04/2018, 12:00HE-LHC
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Volker Mertens (CERN)09/04/2018, 14:00I&O
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Jose Miguel Jimenez (CERN)09/04/2018, 14:25STP
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Susana Izquierdo Bermudez (CERN)09/04/2018, 14:50Magnets
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Anne-Marie Valente-Feliciano (Jefferson Lab)09/04/2018, 15:10SRF
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Anna Zaborowska (CERN)09/04/2018, 16:00FCC-hh Phy/Exp
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David d'Enterria (CERN)09/04/2018, 16:30FCC-ee Phy/Exp
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Bruce Mellado Garcia (University of the Witwatersrand)09/04/2018, 17:00FCC-eh
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Patricia Mcbride (Fermi National Accelerator Lab. (US))09/04/2018, 18:00
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Prof. Geoffrey Norman Taylor (University of Melbourne (AU))09/04/2018, 18:25
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Jorgen D'Hondt (Vrije Universiteit Brussel (BE))09/04/2018, 18:50
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Job de Kleuver (NWO Institutes / APPEC)09/04/2018, 19:15
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Jiyuan Zhai (IHEP)10/04/2018, 08:30SRF
CEPC is a 100 km double-ring circular electron-positron collider operating at 90-240 GeV center-of-mass energy of Z-pole, WW pair production threshold, and Higgs resonance. The conceptual design report (CDR) of CEPC will be completed in mid-2018 as an important step to move the project forward. In this talk, the CDR layout design and configuration of CEPC superconducting RF system will be...
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Oleksandr Viazlo (CERN)10/04/2018, 08:30FCC-ee Phy/Exp
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Peter Lee (Florida State University)10/04/2018, 08:30EASItrain
Significant progress has been made in the last year in advancing the critical current density of RRP® and PIT Nb3Sn strand by more efficient use of the non-Cu volume used to make the Nb3Sn. For RRP® we show how changing the intermediate heat treatment step to better mix the Cu and Sn and avoid unnecessary Nb dissolution can enable critical current density values above 2900 A/mm2 (12 T, 4.2 K)...
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Francis Perez (ALBA Synchrotron - CELLS)10/04/2018, 08:30EuroCirCol
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Daniel Schulte (CERN)10/04/2018, 08:30EuroCirCol
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Franco Bedeschi (Universita & INFN Pisa (IT))10/04/2018, 08:45FCC-ee Phy/Exp
The FCC-ee collider is designed to provide extreme precision measurements of electro-weak parameters running at various center of mass energies: Z pole, WW pair, Z plus Higgs boson and top quark pair production. This machine is expected to deliver an unprecedented luminosity, more than three orders of magnitude of that achieved by LEP at comparable energy, with beam features much different...
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Andy Butterworth (CERN)10/04/2018, 08:45SRF
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Thomas Baumgartner (TU Wien, Atominstitut)10/04/2018, 08:50EASItrain
We present a study on performance limitations and effects on pinning force scaling behavior of A-15 phase inhomogeneity, in particular Sn concentration gradients, in commercial PIT and RRP Nb3Sn wires. Our results were obtained from SQUID magnetometry, scanning Hall probe microscopy, and numerical simulations. Our key findings are that even small radial Sn concentration gradients inside...
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Dr Antoine Chance (CEA Irfu)10/04/2018, 08:50EuroCirCol
The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the options considered for the next generation accelerator in high-energy physics as recommended by the European Strategy Group. In this overview we will describe the status and the evolution of the design of optics integration of FCC-hh, focusing on design of the arcs, alternatives, and tuning procedures.
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Luis Antonio Gonzalez Gomez (INFN e Laboratori Nazionali di Frascati (IT))10/04/2018, 08:50EuroCirCol
The technical design concept for the FCC-hh cryogenic beam vacuum system was developed based on the constraints that emerge from the arc design requirements. Within this framework, a BEam Screen Testbench Experiment (BESTEX) measurement setup was designed with the goal of determining the photodesorption yield, synchrotron radiation heat loads and photo electron generation inside 3 different...
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Ivan Karpov (CERN)10/04/2018, 09:00SRF
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Massimiliano Antonello (Università degli Studi e INFN Milano (IT))10/04/2018, 09:00FCC-ee Phy/Exp
Dual-Readout calorimetry is a technique that allows to overcome the non- compensation problem (one of the main limiting factor for the hadronic energy resolution) by the simultaneous measurement of Cherenkov and scintillation light, produced by the shower particles. Thanks to the expected good energy resolution and the excellent particle identification capability, the Dual-Readout fiber...
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Roberto Kersevan (CERN)10/04/2018, 09:10EuroCirCol
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Carmine Senatore (University of Geneva)10/04/2018, 09:10EASItrain
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36. Accelerating cavity and HOM coupler design study for the Higgs and top operation modes of FCC-eeShahnam Gorgi Zadeh (Rostock University (DE))10/04/2018, 09:15SRF
The design study for the future circular collider (FCC) includes an electron-positron collider with beam energies ranging from 45.6 to 182.5 GeV in order to study the properties of the Z, W and H bosons and the top quark with high precision. In order to accelerate the particles to the required energy, an RF system is needed to provide the accelerating voltage for the four machine setups....
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David Boutin (CEA)10/04/2018, 09:15EuroCirCol
"The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the options considered for the next generation accelerator in high-energy physics as recommended by the European Strategy Group, and the natural evolution of existing LHC. The evaluation of the various magnets mechanical error and field error tolerances in the arc sections of FCC-hh, as well as an estimation of the correctors...
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Giovanni F. Tassielli (INFN Lecce / Università del Salento)10/04/2018, 09:15FCC-ee Phy/Exp
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Herman Ten Kate (CERN)10/04/2018, 09:30FCC-ee Phy/Exp
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Roberto Cimino (LNF-INFN)10/04/2018, 09:30EuroCirCol
In FCC-hh one of the most challenging issue will be the control of all possible instabilities that could occur. In order to do so, all vacuum vessel inner surfaces need to be characterised in great details. Among others properties, their Secondary Electron Yield (SEY), Photo Yield (PY), Reflectivity (R) and their capability to adsorb residual gas molecules and maintain them absorbed during...
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Bernardo Bordini (CERN)10/04/2018, 09:30EASItrain
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Wolfgang Hofle (CERN)10/04/2018, 09:30SRF
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John Jowett (CERN)10/04/2018, 09:35FCC-hh ACC
The remarkably efficient potential operation of the 100 km FCC as a heavy-ion collider was demonstrated right at the inception of the FCC study. Luminosity projections have risen in recent years in line with the higher intensity beams of lead nuclei now being collided in the LHC. Close contact with the physics working group has been maintained to evaluate the interest of heavy Pb-Pb,...
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Roman Martin (CERN)10/04/2018, 10:30EuroCirCol
This talk will give an overview of the developments and the achievements of the Experimental Insertions of FCC-hh.
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Joffre Gutierrez (ICMAB)10/04/2018, 10:30EuroCirCol
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Anna Maria Kolano (CERN)10/04/2018, 10:30FCC-ee Phy/Exp
FCC-ee is designed to operate at energies from 45.6 up to 182.5 GeV with unprecedented luminosity. This brings some challenges in controlling the emission of synchrotron radiation (SR) photons. A scheme of tungsten shielding has been developed to minimize this effect on the detector backgrounds.
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Martina Martinello (Fermilab - IIT)10/04/2018, 10:30SRF
Superconducting accelerating cavities are the technology of choice for many modern and future particle accelerators. Increasing their efficiency is therefore crucial to minimize the power consumption during their operation and therefore significantly cut the cost and enabling the realization of more powerful machines.
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The efficiency of niobium superconducting RF cavities can be maximized in... -
Amalia Ballarino (CERN)10/04/2018, 10:30EASItrain
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Alessandro Leveratto (CNR-SPIN)10/04/2018, 10:45EuroCirCol
HTS coatings have recently been proposed for beam impedance mitigation in the FCC beam screen. One of the candidate materials that can still work under the exceptional conditions of 50K, 16T, above 10^5 A/cm^2 is the Tl cuprate TlSr2Ca2Cu3Ox (Tl-1223) that with a Tc of about 120 K, very high Hc2 and Hirr, and moderate anisotropy is a promising material for such application. This possibility is...
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Simon Hopkins (CERN)10/04/2018, 10:48EASItrain
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Katsiaryna Ilyina-Brunner (CERN)10/04/2018, 10:48SRF
Niobium coated copper accelerating cavities have demonstrated their strong potential in accelerators such as LEP, LHC and HIE-ISOLDE and could become a technology of choice for such a machine as the FCC.
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On the way of further improving thin-film coated copper cavities performances one proposes to substitute niobium by a superconductor that could lead to a higher quality factor as well as a... -
Georgios Gerasimos Voutsinas (CERN)10/04/2018, 10:50FCC-ee Phy/Exp
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Emilia Cruz Alaniz (University of Oxford JAI)10/04/2018, 10:55EuroCirCol
Dynamic aperture studies have been performed on the FCC-hh lattice at different energies to study the stability of the beam and the effect of different errors. Initial studies for the FCC-hh lattice at collision energy with errors on the triplet showed a very low dynamic aperture, most likely affected by the large integrated quadrupole length of the quadrupoles and the high beta function at...
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Dr Oleg Malyshev (STFC Daresbury Laboratory)10/04/2018, 11:00EuroCirCol
Non-evaporable getter coating of vacuum chamber of particle accelerators was invented approximately 20 year ago by C. Benvenuti at CERN. This technology have already demonstrated its benefits an many machines: ESRF, Elettra, Diamond, Soleil, LHC, MAX-IV, etc. The NEG coatings are very effective vacuum solution, the UHV/XHV conditions could be reached in fully coated vacuum chamber of particle...
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Guillaume Jonathan Rosaz (CERN)10/04/2018, 11:06SRF
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Toru Ogitsu10/04/2018, 11:06EASItrain
"The development of Nb3Sn high-field conductor has been executed based on a CERN-KEK collaborative agreement.The scope of the development programme of Nb3Sn high-field conductor is to develop, produce, in representative lengths, and characterize Nb3Sn strand with enhanced characteristics. The final goal is to achieve, in representative unit lengths of material, the following development...
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Niloufar Alipour Tehrani (CERN)10/04/2018, 11:10FCC-ee Phy/Exp
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Francesco Cerutti (CERN)10/04/2018, 11:15EuroCirCol
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Cedric Garion (CERN)10/04/2018, 11:20EuroCirCol
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Victor Pantsyrny (Bochvqr Institute)10/04/2018, 11:24EASItrain
The possibility to create the reliable and solid magnet system of FCC project working with reasonable margin is defined by the development of the internal tin Nb3Sn wires with combination of contradicting properties including the non-Cu critical current density larger than 3000 A/mm2 (12 T&4.2 K) altogether with low effective diameters of the Nb3Sn filaments (down to 20 µm) and high RRR of...
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Anne-Marie Valente-Feliciano (Jefferson Lab)10/04/2018, 11:24SRF
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Mogens Dam (University of Copenhagen (DK))10/04/2018, 11:30FCC-ee Phy/Exp
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Jose Abelleira10/04/2018, 11:35EuroCirCol
Energy deposition simulations have been run with FLUKA for the estimation of the maximum dose on the HE-LHC final-focus magnets. For this purpose, the FCC-hh magnet model has been used and scaled appropriately according to the HE-LHC requirements. The results of these simulations are discussed, including the requirements on shielding thickness as well as its influence on the optics design. In...
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Raffaele G. Agostino (University of Calabria)10/04/2018, 11:40EuroCirCol
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Jiman Kim (Kiswire Advanced Technology Ltd)10/04/2018, 11:42EASItrain
Superconducting wire having high critical current density(Jc) under high magnetic field(16T) is required for fabrication of dipole magnet for FCC project. Currently, Nb3Sn wire is the most promising as a superconducting wire satisfying such a requirement, but in order to reduce amount and manufacturing cost, improvement of Jc is necessary. For this purpose, a preliminary development program of...
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Frank Marhauser (JLAB)10/04/2018, 11:42SRF
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Alain Blondel (Universite de Geneve (CH))10/04/2018, 13:30FCC-ee Phy/Exp
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Cristian Pira (LNL-INFN)10/04/2018, 13:30SRF
A key challenge for the next accelerators is the cost reduction. Bulk niobium cavities performances are closer to their theoretical limits and an alternative technology is mandatory. Niobium thin film copper cavities are the most explored solution, but the Q-slope problem, characteristic of these resonators, limits the applications where high accelerating fields are requested.
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In this work an... -
John Jowett (CERN)10/04/2018, 13:30HE-LHC
We take a first look at the performance of the HE-LHC as a heavy-ion collider, based on the beams foreseen to be available during the high-luminosity heavy-ion phase of the LHC that will start in 2021. Like the FCC, the HE-LHC benefits from the faster radiation damping of heavy ions but beam losses due to collimation and ultraperipheral collisions at the interactions points will require...
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Roderik Bruce (CERN)10/04/2018, 13:30EuroCirCol
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David Larbalestier (National High Magnetic Field Laboratory)10/04/2018, 13:30EASItrain
"Making HTS conductors constrained by the poor superconducting properties of grain boundaries suitable for high field magnet and especially for accelerator use has been a 30 year odyssey. At the NHMFL we have placed particular emphasis on Bi-2212 because of its round-wire, multifilament architecture. Over the last several years we have shown that it can be processed into high Jc forms that...
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Yuri Nosochkov (SLAC National Accelerator Laboratory (US))10/04/2018, 13:50HE-LHC
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Alexander Lunt (CERN)10/04/2018, 13:50SRF
In order to achieve the performance required for the Future Circular Collider (FCC) Superconducting Radio Frequency (SRF) cavities, new superconducting thin films are being investigated. The functionality of the cavities are particularly dependent upon the reliability of these films at the micro and nanoscale. Therefore, in order to gain insight into their characteristics, the advanced...
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emanuela barzi (Fermilab)10/04/2018, 13:50EASItrain
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Patrick Janot (CERN)10/04/2018, 13:50FCC-ee Phy/Exp
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James Molson (CERN)10/04/2018, 13:55EuroCirCol
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Marina Putti (University of Genova)10/04/2018, 14:08EASItrain
The proposed Future Circular Collider at CERN should reach a collision energy of 100 TeV thanks to a four times larger radius and double the magnetic field of the LHC. The latter requirement necessitates the development of superconducting materials/conductors with increased operating field.
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Whilst most efforts are focused on Nb3Sn wires, this is an opportunity to assess the potential for high... -
Paolo Azzurri (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P)10/04/2018, 14:10FCC-ee Phy/Exp
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Jose Abelleira10/04/2018, 14:10HE-LHC
The HE-LHC final focus triplet must be designed for a potential flat beam operation. Flat beams can partially mitigate the effect of the crossing angle on the luminosity. This solution is interesting if the crossing angle can’t be compensated by other means, as for example, by crab-waist rotation. The flat beam parameter choice is explained here, and its luminosity evolution is compared with...
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Marco Arzeo (CERN)10/04/2018, 14:10SRF
Niobium on Copper (Nb/Cu) is being considered as the current technology of choice for the realization of superconducting radio frequency (SRF) accelerating cavities for the future circular collider (FCC). It provides, in fact, a significant reduction of the costs involved [1]. This conclusion assumes the feasibility of niobium coated copper cavities with RF performances at T=4.5 K and 400 MHz,...
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Maurizio Serluca (Centre National de la Recherche Scientifique (FR))10/04/2018, 14:20EuroCirCol
The future circular collider (FCC-hh) with proton beam energy of 50 TeV and total stored energy of 8.4 GJ requires a collimation system with very high cleaning efficiency to prevent quenches of the superconducting magnets. Collimation performance can be strongly affected by collimator imperfections such as gap errors, jaws deformations, tilt and misalignments. Tracking simulations in SixTrack...
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Bernd Seeber (University of Geneva)10/04/2018, 14:26EASItrain
Ternary Molybdenum Chalcogenide (TMC) superconductors were intensely studied until the mid 1990s. Although TMC's are low temperature superconductors (Tc ≤ 15 K), they show upper critical fields up to 60 T. R&D for TMC superconducting wires were carried out by academia and industry, e.g. Alstom (F), Mitsubishi (J) and Plansee (A). Recently it was found that the $/kg price and the $/kAm...
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Tatiana Pieloni (EPF Lausanne)10/04/2018, 14:30HE-LHC
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Carolina Abajo Clemente (CERN)10/04/2018, 14:30SRF
In the framework of the FCC study, niobium-coated copper cavities are considered to operate at 400 MHz. Electrohydraulic forming (EHF) is a potential alternative to conventional shaping methods of copper half cells, through which geometrical precision, a good repeatability and a reduced spring back can be achieved.
Material characterisation by hardness measurements, Electron Backscatter...
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Frank Simon (Max-Planck-Institut fuer Physik), Patrizia Azzi (INFN Padova (IT))10/04/2018, 14:30FCC-ee Phy/Exp
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Mohammad VARASTEH (CERN)10/04/2018, 14:40EuroCirCol
The collimation system intercepts the beam halo by absorbing part of the induced shower and retaining the rest in the warm segment of the ring in order to protect the downstream superconducting (SC) magnets from quenching. The FCC-hh betatron cleaning insertion region (2.7 km long) features primary collimators (TCP), secondary collimators (TCSG) and active absorbers (TCLA), whose design have...
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Barbara Dalena (Université Paris-Saclay (FR))10/04/2018, 15:30EuroCirCol
The Nb3Sn dipole design for the hadron machine option of the Future Circular Colliders enters in an intense and long R&D phase. As a result, more realistic dipole field quality evaluations are available for beam dynamics studies. In this paper we discuss the impact of the main dipole field quality on the first and second order design of the hadron machine and on its dynamic aperture.
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Peng Sha (IHEP, CAS (China))10/04/2018, 15:30SRF
Recently, nitrogen doping (N-doping) technology has been proved to increase Q value of superconducting cavity obviously, which lowers the BCS resistance of Nb. After N-doping, Q of 9-cell 1.3 GHz cavity can be increased to 3E10 at Eacc = 16 MV/m, while 1.5*1010 without N-doping. Since 2013, there have been over 60 cavities nitrogen doped at FNAL, JLAB and Cornell. The Circular Electron...
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Davide Tommasini (CERN)10/04/2018, 15:30EuroCirCol
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Colin Bernet (IPNL/CNRS (Lyon))10/04/2018, 15:30FCC-ee Phy/Exp
The FCC-ee experiments will collect an unprecedented amount of data at sqrt s = 240 and 360 GeV. The Higgs bosons are produced in very large numbers, either in association with a Z boson or through W-boson fusion, and are detected in several decay channels. The production yields are combined to measure the Higgs couplings and invisible width with sub-percent precision. The precision obtained...
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Etienne Rochepault (Université Paris-Saclay (FR))10/04/2018, 15:40EuroCirCol
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Alexej Grudiev (CERN)10/04/2018, 15:50SRF
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Stephane Monteil (Université Clermont Auvergne (FR))10/04/2018, 15:50FCC-ee Phy/Exp
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Elisabeth Renner (Vienna University of Technology (AT))10/04/2018, 15:55EuroCirCol
"The design of the FCC-hh extraction systems is driven by the challenge to safely extract the 50 TeV proton beam. The new baseline for the beam dump system design foresees a fast single plane extraction realized by a highly segmented kicker system and a combination of SuShi (Superconducting Shield) and superconducting Cosine-Theta septa. In the dumpline a focusing structure is included to...
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Fernando Toral (Centro de Investigaciones Energéti cas Medioambientales y Tecno)10/04/2018, 16:05EuroCirCol
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Romain Gerard (CERN)10/04/2018, 16:10SRF
"Superconducting Radio Frequency (SRF) components made of bulk niobium could profit from the novel shapes, parts number reduction of assemblies, and cost and lead time decrease from Additive Manufacturing with Selective Laser Melting (SLM). However, pure niobium is not available on this technology thus far. In the framework of FCC Special Technologies, a project aims at developing pure niobium...
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Elena Graverini (Universitaet Zuerich (CH))10/04/2018, 16:10FCC-ee Phy/Exp
The Standard Model of particle physics is still lacking an understanding of the generation and nature of neutrino masses. A favorite theoretical scenario (the see-saw mechanism) is that both Dirac and Majorana mass terms are present, leading to the existence of heavy partners of the light neutrinos, presumably massive and nearly sterile. These heavy neutral leptons (HNLs) can be searched for...
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Anton Lechner (CERN)10/04/2018, 16:20EuroCirCol
The FCC proton beams pose a severe challenge for the robustness of the beam dump and respective protection devices. Depending on the local beta-function, already a single 50 TeV bunch could induce damage in typical absorber materials currently employed in the LHC machine (e.g. Graphite or carbon composites). In order to safely absorb the FCC beams in a LHC-like dump or beam-intercepting...
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Jinchi Cai (CERN)10/04/2018, 16:30SRF
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Barbara Caiffi (INFN e Universita Genova (IT))10/04/2018, 16:30EuroCirCol
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David d'Enterria (CERN)10/04/2018, 16:30FCC-ee Phy/Exp
By collecting tens of ab^-1 integrated luminosity in the range of center-of-mass energies sqrt(s) =90--350 GeV, the FCC-ee offers unique physics opportunities for precise measurements of QCD phenomena and of photon-photon collisions through, literally, billions of hadronic final states as well as unprecedented large fluxes of quasireal photons radiated from the e+e- beams. We succinctly...
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Brennan Goddard (CERN)10/04/2018, 16:40EuroCirCol
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Patrick Janot (CERN)10/04/2018, 17:00FCC-ee Phy/Exp
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Taaj Sian (STFC)10/04/2018, 17:00EuroCirCol
The Future Circular Collider (FCC-hh) will have a beam screen with T between 20 and 60 K. Electron cloud mitigation will be critical for the FCC-hh and it has been specified that the wall material needs to have a Secondary Electron Yield (SEY) < 1. Since the LASE surfaces with SEY<1 are the baseline electron cloud mitigation technique, it is critically important to study the behaviour of the...
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Jinchi Cai (CERN)10/04/2018, 17:00SRF
A code called KlyC is developed in CERN for the optimization and design of high efficiency Klystron based on new bunch mechanisms. This paper demonstrates the basic algorithm of the code and introduce its graphical user interface. After that, the design of FCC prototype Klystron based on KlyC will be presented. The benchmark and diagnosis of this device will also be attached to validate KlyC...
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Leon Van Riesen-Haupt10/04/2018, 17:00FCC-hh ACC
The sizes of the beta functions in the final focus triplet of a synchrotron collider have a great impact on the chromaticity and dynamic aperture of the machine. These beta functions are proportional to the square of the length of the final drift so it is desirable to keep it as short as possible whilst leaving enough room for the experiment. In the latest design of the FCC-hh this drift was...
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Ildar Abdyukhanov (VNIINM (Bochvar Institute))10/04/2018, 17:00Magnets
One of the critical parameters of the high Jc internal tin Nb3Sn strands designated for the high field magnets of the FCC project is essentially high RRR value exceeding 150. In this work Oxygen free high-purity copper with RRR>400 was used for production of internal tin Nb3Sn wires of 0,7 and 1 mm in dia with 37 sub-elements in distributed diffusion Nb-barriers. Final reactions from 25 to...
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Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))10/04/2018, 17:00FCC-ee ACC
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Efstathios Logothetis Agaliotis (National Technical Univ. of Athens (GR))10/04/2018, 17:00FCC-hh ACC
One of the biggest challenges in the design of the FCC-hh is the collimation system. From LHC experience it is known that a collimation system optimized for proton cleaning has a significantly reduced efficiency for heavy ions. The study presented in this contribution evaluates the betatron-collimation efficiency for the heavy-ion operation with lead nuclei at a beam energy of 50 Z TeV in the...
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Jie Gao (Institute of High Energy Physics, China)10/04/2018, 17:00FCC-ee ACC
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Dr Dou WANG (IHEP)10/04/2018, 17:00FCC-ee ACC
An analytical electron positron circular collider optimized design method has been developed with carb-waist collision and CEPC parameters for Higgs, W and Z have been given by this method. For the lattice of CEPC collider ring, the combined magnet (dipole+sextupole)scheme has been developed to reduced the power consumption of the stand-alone sextupoles. The power consumption of the original...
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Stephane Monteil (Université Clermont Auvergne (FR))10/04/2018, 17:00FCC-ee Phy/Exp
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Jussi-Pekka Penttinen (Ramentor Oy)10/04/2018, 17:00I&O
This contribution presents our collider availability model used in FCC study. The model represents failure logics, operations and calculates the integrated luminosity productions, which is one of the key performance indicator for colliders. The operation phases are essential part of the collider model, as several steps are required to prepare the collider for collisions. This means that the...
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Maria Mylona (CERN)10/04/2018, 17:00I&O
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Serdar Atamert ( Epoch Wires)10/04/2018, 17:00EASItrain
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Maria Mylona (CERN)10/04/2018, 17:00I&O
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Prof. Haluk Denizli (Abant Izzet Baysal University)10/04/2018, 17:00Physics
We probe the effects of dimension-eight operators giving rise to anomalous neutral triple gauge boson interactions of Z𝛾𝛾 and Z𝛾Z vertices in l-l+𝛾 production (pp→ l-l+𝛾) at 100 TeV centre of mass energy of future circular hadron collider, namely FCC-hh. The analysis is performed on transverse momentum of photon and angular distribution of charged lepton in the final state including a...
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256. Critical Current Degradation Measurements for RRP Nb3Sn Strands Under Applied Transversal LoadsJose Ferradas Troitino (Universite de Geneve (CH))10/04/2018, 17:00EuroCirCol
Superconducting niobium-tin (Nb3Sn) wires have become a key technology for the development of next generation accelerator magnets. These conductors can be described by their high critical current density but also by their remarkable strain-dependent behavior. In presence of mechanical loads, the superconducting lattice is distorted resulting usually in a reversible decrease of the critical...
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Tessa Charles (University of Melbourne (AU))10/04/2018, 17:00
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Marco Angelucci10/04/2018, 17:00EuroCirCol
In FCC-hh, one of the most challenging issue will be to limit all possible instabilities that could occur. Expected instabilities are mainly related to the large number of photons and photoelectrons present in the vacuum beam-pipe. Photons and photoelectrons will induce gas desorption and single beam instabilities, whereas at LHC instabilities are dominated by e-cloud formation. It is,...
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Krisztian Peters (DESY), Janik Von Ahnen (DESY)10/04/2018, 17:00FCC-ee Phy/Exp
This work presents a study of Higgs boson production in jets and missing energy final states at the FCC-ee collider. In particular, we explore how different detector parameters and the beam strahlung affect the sensitivity of Higgs boson coupling measurements.
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Judit Szalai (Budapest University of Technology and Economics (HU))10/04/2018, 17:00STP
In this paper we aim to reveal methods that can decrease the time spent on the mechanical elements development increasing the efficiency of the process. The challenge in this scheme is the optimization of a large number and variety of components in the ITER diagnostic system. During our work we compared the engineering requirements with the specific requirements of a fusion power plant.
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Our... -
Paolo Azzurri (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P)10/04/2018, 17:00FCC-ee Phy/Exp
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Felix Josef Wolf (TU Bergakademie Freiberg (DE))10/04/2018, 17:00Magnets
The stress-strain behaviour of the Nb3Sn conductor blocks of the superconducting coils for the Future Circular Collider (FCC) magnets need to be known in order to predict the stress state distribution in the coils during magnet assembly and operation. The stress-strain behaviour of reacted and impregnated 11 T Rutherford cable stacks has been determined using a dedicated set-up with an...
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Alain Blondel (Universite de Geneve (CH))10/04/2018, 17:00FCC-ee Phy/Exp
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Song JIN10/04/2018, 17:00STP
Nowadays, electropolishing (EP) becomes a necessary method for Nb cavity treatment for either high gradient or high quality factory requirements. So, an EP system was development at IHEP, CAS. In this paper, the design of the system will be discussed in details. The time schedule and progress of the system manufacture will be reported. Besides, several key points will be also mentioned in the paper.
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Claudio Kotnig10/04/2018, 17:00I&O
The cryogenic distribution and discharge system of the FCC-hh beam-bending sections (arcs) will require 220 MW of electric power in nominal operation. The two biggest consumers are the Cold Mass Cooling (≈ 60 % of the supplied power) and the Beam Screen Cooling including the Thermal Shielding of the Cold Mass and the Cryogenic Distribution Line (≈ 37 % of the supplied power). The cryogenic...
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Fani Valchkova-Georgieva (CERN)10/04/2018, 17:00I&O
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Yuancun Nie (CERN)10/04/2018, 17:00STP
As the energy stored in the FCC superconducting magnet circuits and the energy of the beams will be more than an order of magnitude larger than in the present day accelerators, there are new challenges concerning FCC Machine Protection. An overview of the different magnet circuits and their criticality, taking into account their time constants and effect on the orbit, are presented. The...
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Nicolo Foppiani (Harvard University)10/04/2018, 17:00FCC-ee Phy/Exp
FCC-ee special features for the high energy running, description of top precision measurements at threshold and above and implications for new physics.
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Alexandre Krasnov (Budker Institute of Nuclear Physics (BINP))10/04/2018, 17:00STP
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Gerd Kuhlmann (Fraunhofer IML)10/04/2018, 17:00I&O
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Xabier Sarasola (EPFL)10/04/2018, 17:00Magnets
In the framework of the EuCARD-2 WP-10 program, CERN has produced two sets of High Temperature Superconductor (HTS) insert-magnets wound with ReBCO-Roebel cable, named FeaTHeR-M2 and FeaTHeR-M0. FeaTHeR-M2 is an aligned block magnet designed to generate 5 T in a 40 mm aperture, whereas FeaTHeR-M0 are sub-scale planar racetrack coils designed to test fabrication techniques and gain experience...
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Sondre Vik Furuseth (Norwegian University of Science and Technology (NO))10/04/2018, 17:00FCC-hh ACC
The beam-beam interaction is one of the most severe limitations on the performance of circular colliders, as it is an unavoidable strong nonlinear effect. As one aspires for greater luminosity in future colliders, one will simultaneously achieve stronger beam-beam interactions. We study the limitations caused by strong incoherent head-on beam-beam interactions, using a new GPU-based code...
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Ingo Ruehl (CERN)10/04/2018, 17:00I&O
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Artur Romanov (ICMAB (ES))10/04/2018, 17:00STP
The baseline design of the FCC-hh beam screen is based on an octagonal shaped stainless steel tube coated in its interior with copper. The surface impedance of the beam screen has a strong impact on the beam stability. In the foreseen operating temperature range between 40 K and 60 K the intended coating might not guarantee an impedance sufficiently low for a stable beam. This motivates the...
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Lorenzo Pezzotti (Universita and INFN (IT))10/04/2018, 17:00FCC-ee Phy/Exp
Dual-Readout calorimetry is a relatively new calorimetric technique able to overcome the non-compensation problem by means of two independent scintillation and Cherenkov light signal detections. Scintillating photons provide a signal proportional to the whole energy deposition in the calorimeter while Cherenkov photons emitted in clear fibers provide a signal almost exclusively related to the...
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Marc Dunser (CERN)10/04/2018, 17:00FCC-ee Phy/Exp
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Anna Maria Kolano (CERN)10/04/2018, 17:00FCC-ee Phy/Exp
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Yunlong Chi (Institute of High Energy Physics)10/04/2018, 17:00FCC-ee ACC
CEPC is a 100 km circular electron-positron collider operating at 90-240 GeV center-of-mass energy of Z-pole, WW pair production threshold, and Higgs resonance. CEPC and its successor SPPC, a 100 TeV center-of-mass super proton-proton collider, will ensure the elementary particle physics a vibrant field for decades to come. To reduce the overall cost, partial double ring scheme was proposed as...
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Fani Valchkova-Georgieva (CERN)10/04/2018, 17:00I&O
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Gerardo Guillermo Canton (Centro de Investigación y de Estudios Avanzados del IPN (MX))10/04/2018, 17:00FCC-hh ACC
At high proton-beam energies, beam-induced synchrotron radiation is an important source of
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heating, of beam-related vacuum pressure increase, and of primary photoelectrons, which can give
rise to an electron cloud. We present the synchrotron radiation map computed by Synrad3D for the latest shape of the FCC-hh vacuum chamber with a sawtooth surface instead of a wedge. -
Sha Bai (IHEP)10/04/2018, 17:00FCC-ee ACC
With the discovery of the Higgs boson at around 125GeV, a circular Higgs factory design with high luminosity (L ~ 10^34 cm^-2 s^-1) is becoming more popular in the accelerator world. The CEPC project in China is one of them. Machine Detector Interface (MDI) is the key research area in electron-positron colliders, especially in CEPC, it is one of the criteria to measure the accelerator and...
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David d'Enterria (CERN)10/04/2018, 17:00FCC-ee Phy/Exp
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Claudio Fichera (CERN)10/04/2018, 17:00Magnets
In the framework of the FCC study, the Nb3Sn technology plays a crucial role for high-field superconducting magnets. The new generation Nb3Sn cable greatly contributes to bring the magnetic field produced by the superconducting dipole magnets to the 16 T level; nevertheless, its mechanical properties are unknown making it difficult to predict the mechanical behaviour of the magnet structure....
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Sigrid Holleis (TU Wien)10/04/2018, 17:00FCC-hh ACC
A part of the FCC-hh design study explores different superconducting materials, which could be suitable to function as a coating on the beam screen, held at 50 K. Such a superconducting coating should be able to carry the beam image currents and lower the beam impedance in order to guarantee a high beam stability margin. Our study focuses on the still technologically unexploited thallium-based...
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Stephan Pfeiffer (TU Wien)10/04/2018, 17:00EuroCirCol
We present results of microstructural examinations of grain size distribution, grain geometry, compositional gradients and local texture performed on Nb3Sn wires of various manufacturing techniques. Measurements were conducted using high-resolution TEM (transmission electron microscopy), EDX (energy-dispersive X-ray spectroscopy) and TKD (transmission Kikuchi diffraction). Findings include...
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Theo Finley Sinkovits (CERN)10/04/2018, 17:00STP
Minimising the thickness of TiZrV non-evaporable getter (NEG) coatings is mandatory for increasing single-bunch instability thresholds in the proposed FCC-ee high luminosity lepton collider. After thermal activation the NEG surface is depleted of its O content and the total electron yield (TEY) decreases to values close to 1.1. The effect of reducing the thickness of NEG coatings on activation...
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Steffen Kloeppel (TU Dresden)10/04/2018, 17:00I&O
The current cryogenic design for the FCC-hh consist of a helium cycle with pre-cooling by the Nelium cycle. Both have their own set of compressors and heat exchangers. The potential of combination of these two distinct cycles with a reduced number of components is investigated. Using efficient turbo compressors requires a mixed refrigerant with a heavier ballast gas to achieve reasonable...
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Elizabeth Locci (Université Paris-Saclay (FR))10/04/2018, 17:00FCC-hh Phy/Exp
The volume of data produced at the Large Hadron Collider (LHC) is immense and represent a considerable processing challenge. Moreover the LHC and future hadronic colliders are the most demanding environments, with respect to ultra-low latencies, ultra-high data rate, reliable indoor coverage and harsh radiation environment, in the world.
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Any technology meeting the above conditions will have to... -
Oleg Malyshev (STFC Daresbury Laboratory)10/04/2018, 17:00EuroCirCol
Non-evaporable getter coating of vacuum chamber of particle accelerators was invented approximately 20 year ago by C. Benvenuti at CERN. This technology have already demonstrated its benefits an many machines: ESRF, Elettra, Diamond, Soleil, LHC, MAX-IV, etc. The NEG coatings are very effective vacuum solution, the UHV/XHV conditions could be reached in fully coated vacuum chamber of particle...
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Ralf Roeder (CiS FIMP)10/04/2018, 17:00FCC-hh Phy/Exp
The CiS Forschungsinstitut fuer Mikrosensorik is engaged in developments of radiation detector technologies on several different fields. Current projects are dealing with large area thinned sensors, active edge sensors, 3D sensors, sensor-chip packaging technologies and defect engineering.
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For large area sensors, the need for smaller thicknesses can be approached by etching cavities to the... -
Taaj Sian (STFC)10/04/2018, 17:00EuroCirCol
The vacuum chamber surface characteristics such as the photon and secondary electron yields (PEY and SEY) are critical for formation of an electron cloud, this is a serious problem that effects proton and positron accelerators. A few years ago it was discovered by us that Laser Ablation surface engineering (LASE) could provide surfaces with SEY<1. These LASE surfaces are the baseline design...
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Arturs Ivanovs (Riga Technical University (LV))10/04/2018, 17:00STP
Likewise LHC, FCC tunnel should be carefully supervised to ensure safety of personnel. Nevertheless, in case of an accident, in order to increase success of the mission and reduce risks for rescue team, it will be crucial for firefighters to collect as much information as possible about the location of victims inside tunnel before entering the unsafe zone. Due to the large size of FCC, rapid...
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Martin Novak10/04/2018, 17:00STP
The SuShi septum project aims to realize a high-field, compact septum magnet using a superconducting shield to create a zero-field region within a strong magnetic field. One of the candidate materials is MgB2, a cheap and easy-to-handle material. A first prototype has been tested in a spare corrector magnet (MCBY) of the LHC. Experimental results of this test will be presented and compared to...
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Ignasi Bellafont10/04/2018, 17:00EuroCirCol
The vacuum chamber of the FCC-hh will have to cope with unprecedented levels of synchrotron radiation power, dealing simultaneously with tighter impedance and magnet aperture requirements. Given that the high radiation power and photon flux will release larger amounts of gas into the system, new solutions for designing the beam-screen geometry and estimating the effective pumping speed and...
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Staszek Jadach (Polish Academy of Sciences (PL))10/04/2018, 17:00FCC-ee Phy/Exp
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Mithlesh Kumar (PSI - Paul Scherrer Institut)10/04/2018, 17:00Magnets
High field accelerators magnets will require coil grading, and thus low resistance joints (splices), in order to increase the magnetic field and decrease magnet cost. These joints must have low resistance (<1 nΩ) and reasonably good mechanical strength. Three techniques have been initially considered by the Applied Superconductivity group of the Swiss Plasma Center for the preparation of...
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Haluk Denizli (Abant Izzet Baysal University)10/04/2018, 17:00Physics
We analysed anomalous top FCNC couplings via the production of single top quark in association with a photon at 100 TeV centre of mass energy. In our analysis, we consider the invariant mass distributions of reconstructing top quark mass; one lepton and missing energy transfer reconstructing W, and one b-tagged jet for lvb𝛾 final state, and one b-tagged jet and two other jets reconstructing W...
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Ildar Abdyukhanov (VNIINM (Bochvar Institute))10/04/2018, 17:00Magnets
In this study we consider the results of development and production low temperature superconductors on base of Nb3Sn by the “internal tin” method with critical current density more than 2450 A/mm2. The obtained superconductors of 1.0 to 0.7 mm in diameter of different layouts have been subjected to reaction by various regimes for the formation of the superconducting compound, and then their...
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David d'Enterria (CERN)10/04/2018, 17:00FCC-ee Phy/Exp
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Mr Marco Alan Valdivia Garcia (Universidad de Guanajuato (MX))10/04/2018, 17:00FCC-ee ACC
"In the collisions of proposed future circular colliders, like FCCee and CEPC, the beamstrahlung...
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Jiani Gao (Paul Scherrer Institut)10/04/2018, 17:00Magnets
An innovative high-field superconducting dipole magnet of Canted-Cosine-Theta (CCT) type has been proposed for Future Circular Collider (FCC) design. The unique mechanical structure intercepts the accumulated forces lowering the stress on the windings. Nevertheless, the former itself also becomes a barrier for heat to quickly propagate in case of a quench. To succeed in the CCT-type magnet...
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Reza Valizadeh (STFC Daresbury Laboratory)10/04/2018, 17:00EuroCirCol
Developing a surface with low Secondary Electron Yield (SEY) is one of the principal methods of mitigating the beam-induced electron multipacting and electron cloud in high-energy charged particle accelerators. Since the wall material, surface chemistry, topography and electron energy are the parameters that influence the SEY, common mitigation mechanisms are based on engineering the above...
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Patrick Krkotić (ALBA)10/04/2018, 17:00STP
The baseline design of the FCC-hh beam screen is based on an octagonal shaped stainless-steel tube coated in its interior with copper. The surface impedance of the beam screen has a strong impact on the beam stability. In the foreseen operating temperature range from 40 K to 60 K the intended coating might not guarantee an impedance sufficiently low for a stable beam. This motivates the...
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Tobias Tydecks (CERN)10/04/2018, 17:00FCC-ee ACC
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Oliver Fischer (Unibas)10/04/2018, 17:00FCC-ee Phy/Exp
"Right-handed or, equivalently, sterile neutrinos are among the most attractive extensions of the SM to generate the light neutrino masses observed in neutrino oscillation experiments.
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When the right-handed neutrinos are subject to a ""lepton number""-like symmetry they can have masses around the electroweak scale and potentially large Yukawa couplings, which makes them testable at the... -
Linhao Zhang (IHEP)10/04/2018, 17:00FCC-hh ACC
After the discovery of Higgs boson in LHC of CERN, Chinese scientists immediately proposed a plan to build next generation colliders -- CEPC&SPPC. SPPC (Super Proton Proton Collider) is the second phase of this project to explore new physics beyond the standard model. The key design goal for SPPC is to reach 75 TeV in center of mass energy with a circumference of 100 km. As an important part...
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Eliana La Francesca (LNF-INFN Frascati (Rome) , Italy)10/04/2018, 17:00EuroCirCol
In the Highest Energy Proton Circular Collider ever designed, FCC-hh, a large production of Synchrotron Radiation (SR) is expected. This SR causes heat load on the accelerator walls, photon stimulated desorption, production of secondary electrons, beam instability, etc. Thus, it is very important to have an experimental characterization of optical properties of technical surfaces, in...
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Luisa Spallino (LNF-INFN)10/04/2018, 17:00EuroCirCol
One of the many important parameters to be studied and fixed in the design of the FCC-hh is the operational temperature (T) at which the foreseen beam screen should operate. Such choice will necessarily be a compromise between the desire to reduce cooling costs (keeping it at as close as possible to room T) and to have a minimal wall resistivity (keeping it at as low as possible Ts). The...
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Song Jin10/04/2018, 17:00STP
A 650MHz 5cell waveguide HOM Cavity was fabricated at IHEP. Due to the waveguide structure, the cavity will be a good candidate for high HOM power machines. In this paper, we will report progress of the cavity fabrication, and preparation for post-treatment and vertical test. Lessons we learnt during process will also be discussed. Some new fabrication procedures will also be presented.
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Jiman Kim (Kiswire Advanced Technology Ltd)10/04/2018, 17:00Magnets
Nb3Sn wire is the proposed type II superconductor to be used as the superconducting dipole magnet in Future Circular Collider (FCC) for its superior superconducting properties at high magnetic field (16T). Heat treatment and phase formation of Nb3Sn internal tin superconductors are quite complicated due to the need to convert low melting temperature tin-rich phases to high temperature...
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Francesco Grancagnolo (Universita & INFN Pisa (IT))10/04/2018, 17:00FCC-ee Phy/Exp
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Dr Giovanni Bencivenni (INFN e Laboratori Nazionali di Frascati (IT))10/04/2018, 17:00FCC-hh Phy/Exp
The μ-RWELL has been conceived as a compact, simple and robust Micro-Pattern Gaseous Detector for large area HEP applications in a harsh environment. The detector amplification stage is realized with a polyimide foil micro-patterned with a blind-hole matrix embedded through a thin DLC resistive layer in the readout PCB. The introduction of this layer, mitigating the transition from streamer to...
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Nicolo Foppiani (Harvard University), Patrizia Azzi (INFN Padova (IT))10/04/2018, 17:00FCC-ee Phy/Exp
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Paolo Azzurri (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P)10/04/2018, 17:00FCC-ee Phy/Exp
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Stephane Monteil (Université Clermont Auvergne (FR))10/04/2018, 17:00FCC-ee Phy/Exp
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Patrizia Azzi (INFN Padova (IT))10/04/2018, 17:00FCC-ee Phy/Exp
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Naomi Van der Kolk (Universiteit Utrecht)10/04/2018, 17:00FCC-ee Phy/Exp
The latest expected sensitivities for the search of flavor changing neutral current processes in top events at the FCC-ee collider run at 365 GeV will be presented in this poster.
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Giuseppe Montenero10/04/2018, 17:00Magnets
The Canted-Cosine-Theta (CCT) PSI magnet program aims at demonstrating that the CCT technology has the potential for the development of 16 T dipole magnets, required for the “near” future of circular colliders. The first step in this direction is the implementation of a Nb3Sn 1-m-long, 2-layer CCT single-aperture dipole model, referred to as Canted Dipole One (CD1) which is designed to achieve...
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Marian Luckhof (Hamburg University (DE))10/04/2018, 17:00FCC-ee Phy/Exp
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Alain Blondel (Universite de Geneve (CH))10/04/2018, 17:00FCC-ee Phy/Exp
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Ruta Sirvinskaite (STFC)10/04/2018, 17:00EuroCirCol
Due to its advantages such as evenly distributed pumping speed, low thermal outgassing and low photon and electron stimulated desorption yields, the non-evaporable getter (NEG) coating has been used in particle accelerators for years. Even though quaternary Ti-Zr-Hf-V coating deposited from an allow wire has been found to have the lowest desorption yields, highest sticking probability and...
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Jorge de Blas (Universita e INFN, Padova (IT))10/04/2018, 17:00FCC-ee Phy/Exp
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Stan Bentvelsen (Nikhef National institute for subatomic physics (NL))10/04/2018, 20:00
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Jo van den Brand10/04/2018, 20:15
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Ivo Van Vulpen (Nikhef National institute for subatomic physics (NL))10/04/2018, 20:55
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Bob Van Eijk (Nikhef National institute for subatomic physics (NL))10/04/2018, 21:35
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John Andrew Osborne (CERN)11/04/2018, 08:30
This presentation covers the development of the design of the civil infrastructure required for the FCC-hh, FCC-ee and FCC-eh machines. This includes the refinement of the design of specific structures, such as the experimental and junction caverns, as well as major design updates, for example, the inclusion of an inclined access tunnel. The feasibility and expected construction techniques of...
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Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))11/04/2018, 08:30FCC-ee ACC
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Max Klein (University of Liverpool (GB))11/04/2018, 08:30Physics
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Dr Daniel Barna (Hungarian Academy of Sciences (HU))11/04/2018, 08:30
A bulk superconducting magnetic shield can create the sharp transition between the high-field and no-field zones of septum magnets. This technique promises to reach significantly higher fields than what is possible with current technology, without compromising compactness. The experimental results with three different shield materials will be presented and compared. Simulation results...
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Bernhard Auchmann (CERN)11/04/2018, 08:30EuroCirCol
We present the status of the Canted-Cosine-Theta (CCT) design of an FCC-hh / HE-LHC dipole, its magnetic and mechanical properties, as well as its protectability. We will develop on the strengths and challenges of this design and lay out the R&D plan at Paul Scherrer Institute to address the challenges, together with first practical results.
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Vittorio Parma (CERN)11/04/2018, 08:50EuroCirCol
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Alejandro Sanz Ull (Eindhoven Technical University (NL))11/04/2018, 08:50
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Katsunobu Oide (High Energy Accelerator Research Organization (JP))11/04/2018, 08:50FCC-ee ACC
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Andrea Dainese (INFN - Padova (IT))11/04/2018, 08:50Physics
This presentation will review the projected accelerator performance and the physics opportunities for a heavy-ion programme at FCC-hh [1]. In addition, the status of the FCC-hh detector design studies will be discussed.
Operating FCC-hh with heavy-ion beams would provide Pb-Pb and p-Pb collisions at center of mass energy of 39 and 63 TeV per NN pair, respectively. Current estimates indicate...
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Mark Jones (CERN)11/04/2018, 08:55
Geodesy and the associated geodetic infrastructure are essential to all the CERN Survey team activities, and much of it is necessary for the civil engineering teams for new projects too –albeit to a lower precision. The reference systems and the materialisation of those systems, the theoretical location of the new installations in those systems, and fieldwork control installations must all be...
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Tiina-Mari Salmi (Tampere University of Technology, Finland)11/04/2018, 09:05EuroCirCol
One of the aspects studied during the design of the 16 T Nb3Sn dipole magnets was their safety during quenches occurring in magnet operation and testing. To ensure that the foreseen quench protection technologies can limit the magnet temperatures and voltages to safe values, several criteria related to quench protection were included in the magnet design. As the magnet designs matured,...
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Tessa Charles (University of Melbourne (AU))11/04/2018, 09:10FCC-ee ACC
The 100 km FCC-ee e+/e- circular collider requires luminosities in the order of 10^35 cm^-2 s^-1 and very low emittances of 1nm for eps_x and 2pm for eps_y. In order to reach these requirements, extreme focusing of the beam is needed in the interaction regions, leading to a vertical beta function of 2mm at the IP. These challenges make the FCC-ee design particularly susceptible to...
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Riccardo Torre (CERN)11/04/2018, 09:10Physics
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Kei SUGITA (GSI)11/04/2018, 09:10
Challenging requirements are set for the FCC extraction septum magnets.
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A scaled up LHC-like beam dump system or a massless architecture are not applicable in terms of maximum field, space reservation and power consumption.
The truncated cosine-theta septa configuration with a target field of 4 T has been proposed to address these requirements maintaining the reliability and availability of... -
Dominique Missiaen (CERN)11/04/2018, 09:15
"The CERN Survey team is involved at all stages of the construction of a new particle accelerator and its experimental detectors. From very early, when the geodetic aspects are quite important to determine the location of the structure and the preparation of the civil engineering works, up to the final alignment of the components, the Survey team is involved in all activities necessary to...
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Tobias Tydecks (CERN)11/04/2018, 09:25FCC-ee ACC
FCC-ee will be a precision measurement tool for Z, W, H and t physics with expected luminosities of 2.07 × 10^36 cm−2 s−1 at the Z-pole and 1.3 × 10^34 cm−2 s−1 at the tt ̄ threshold. In order to achieve the foreseen luminosities, a vertical β* of 1 mm to 2 mm is mandatory. Dynamic aperture and frequency maps for the 97.75 km machine are studied. Furthermore, effects of machine misalignments...
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Mike Barnes (CERN)11/04/2018, 09:30
Fast-switching, high voltage, pulse generator topologies, such as the semiconductor based Marx generator, are being actively pursued for possible replacement of thyratrons and PFLs in existing kicker systems. Such topologies are required for the FCC injection kicker system. In this talk the design of a prototype solid state Marx generator, using new SiC MOSFET devices, is presented. The layout...
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Marco Prioli (CERN)11/04/2018, 09:30EuroCirCol
Within the FCC project, the EuroCirCol Work Package 5 is dedicated to the design of 16 T Nb3Sn superconducting dipole magnets. Three main aspects are considered during the design phase, i.e. the optimization of the electromagnetic performance of the dipole magnets, their mechanical structure and quench protection design. Various numerical models have been built for their analysis, employing...
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Andrea Wulzer (CERN)11/04/2018, 09:35Physics
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Andreas Nettstraeter (FIML Dortmund)11/04/2018, 09:35
Logistics is of great importance for the construction, assembly and operation of the FCC. During the planning, construction and assembly of LHC, logistics already proved to be one of ten key factors. For the planning of FCC several logistics aspects were analysed or discussed:
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1. Supply strategies for FCC cryo-units;
2. Locations for the storage, assembly and testing facilities;
3. Transport... -
Daniel Schoerling (CERN)11/04/2018, 09:45EuroCirCol
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Susana Izquierdo Bermudez (CERN)11/04/2018, 10:30EuroCirCol
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Mike Barnes (CERN)11/04/2018, 10:30
A fast, highly reliable, injection kicker system is required for FCC injection: the system must not limit accelerator performance. Important considerations in the design of such a system are machine protection constraints, collider filling factor and hence rise and fall times of the kicker magnet field. Fast rise time kicker magnets are generally ferrite loaded transmission line type magnets...
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Markus Klute (Massachusetts Inst. of Technology (US))11/04/2018, 10:30Physics
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Manuela Boscolo (INFN e Laboratori Nazionali di Frascati (IT))11/04/2018, 10:30FCC-ee ACC
The wide range of beam energies of the FCC-ee accelerator presents unique challenges to the interaction region. An update of this design will be discussed with emphasis on the basic choices and its mechanical constraints. A first 3d mechanical design of the IR will be presented addressing some open questions.
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Laurent Jean Tavian (CERN)11/04/2018, 10:30EASItrain
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Nicolas Magnin (CERN)11/04/2018, 10:50
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Dr Francesco Collamati (INFN Roma I (IT))11/04/2018, 10:55FCC-ee ACC
Beam-gas induced background has been studied for the MDI region of the FCC-ee at all the operating running energies. Beam loss maps with characterization of the lost particles and full analysis is perfomed with MDISim. Vacuum requirement in the upstream region before the IR and the IR itself is presented. The loss particles can eventually be tracked in the geant4 detector model and luminosity...
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Roberto Tenchini (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P)11/04/2018, 10:55Physics
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Francois Millet11/04/2018, 10:55EASItrain
A 100 TeV hadron collider in a 100 km long tunnel is selected as the baseline of the overall infrastructure for the present FCC study. The cooling requirements for FCC-hh cryogenic system are challenging with a very large refrigeration capacity (100 kW equivalent at 4.5 K) up to 3 to 4 times larger than the present state-of-the-art and a non-conventional thermal load distribution with very...
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Alexander Zlobin (Fermilab)11/04/2018, 11:00EuroCirCol
US Magnet Development Program (MDP) is developing a 15 T Nb3Sn dipole demonstrator for a post-LHC pp Collider. The magnet design is based on 60-mm aperture 4-layer shell-type coils, graded between the inner and outer layers to maximize the magnet performance. An innovative mechanical structure based on aluminum IC-clamps and a thick stainless steel skin was developed to preload brittle Nb3Sn...
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David Woog (CERN)11/04/2018, 11:10
In order to achieve a highly reliable and modular kicker system for the FCC injection, a semiconductor-based inductive adder (IA) pulse generator is being developed. To achieve the required high voltage and current, the IA consists of series-connected 1:1 pulse transformers (layers). The appropriate number of secondary windings are connected in series to generate the required voltage at the...
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Evgeny Levichev (Budker Institute of Nuclear Physics (RU))11/04/2018, 11:15FCC-ee ACC
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Steffen Kloeppel (TU Dresden)11/04/2018, 11:20EASItrain
The mixed refrigerant turbo Brayton cycle with neon and helium was initially designed to cool the beam screens of the FCC in a temperature range from 40 K to 60 K. The current cryogenic design of this cycle for the FCC-hh can use refrigeration above 25 K for other purposes as well, e.g. for the cool-down of the magnets, thus saving large amounts of LN2 required otherwise, or transient...
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Christian Schwanenberger (Deutsches Elektronen-Synchrotron (DE))11/04/2018, 11:20Physics
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Alexander Ryazanov11/04/2018, 11:30
The effect of irradiation of fast particles on the radiation resistance and behavior of collimators and superconductor materials for magnets is very important and serious task for Future Circular Collider (FCC). The energies of fast protons in FCC will be up to 100 TeV and it is much higher comparing with LHC proton beam, where energy is up to 7 TeV. Other very important point for fast...
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Shlomo Caspi (Lawrence Berkeley national laboratory USA)11/04/2018, 11:30EuroCirCol
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Dima El Khechen (CERN)11/04/2018, 11:35FCC-ee ACC
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Jorge de Blas (INFN-Padova)11/04/2018, 11:40Physics
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Laurent Jean Tavian (CERN)11/04/2018, 11:40EASItrain
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Etienne Rochepault (Université Paris-Saclay (FR))11/04/2018, 11:45EuroCirCol
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Mauro Nonis (CERN)11/04/2018, 13:30
New inputs from different actors have triggered modifications in the design of the cooling and ventilation infrastructure for the FCC. In this presentation, the new parameters and constraints will be shown as well as the current technical proposals to fulfil the new and the still-valid previous requirements. Among other topics, the author will focus, in particular, on the ventilation of the...
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Eleonora Belli (Sapienza Universita e INFN, Roma I (IT))11/04/2018, 13:30FCC-ee ACC
FCC-ee is a high luminosity lepton collider designed to cover the beam energy range from the Z pole (45.6 GeV) to the top pair threshold (175 GeV). One of the major issues for this machine is represented by collective effects due to electromagnetic fields generated by the interaction of the beam with the vacuum chamber, which could produce instabilities and limit the machine performance. This...
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Filip Moortgat (CERN)11/04/2018, 13:30FCC-hh Phy/Exp
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Soren Prestemon (LBNL)11/04/2018, 13:30Magnets
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Lotta Mether (EPFL - Ecole Polytechnique Federale Lausanne (CH))11/04/2018, 13:50FCC-ee ACC
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Michele Selvaggi (CERN)11/04/2018, 13:50FCC-hh Phy/Exp
The future circular hadron-hadron collider FCC-hh is expected to produce collisions at the unrivaled center of mass energy of sqrt(s) = 100 TeV and to deliver an integrated luminosity of few tens of ab-1. As a result, billions of Higgs bosons will be produced. Having at disposal such humongous samples opens a wide range of possibilities in the realm of precision Higgs measurements. The Top...
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Qingjin XU (IHEP)11/04/2018, 13:50Magnets
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Davide Bozzini (CERN)11/04/2018, 13:55
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Dr Alexander Novokhatski (SLAC National Accelerator Laboratory)11/04/2018, 14:05FCC-ee ACC
We analyze effects of the Higher Order Modes (HOM) heating in the FCC ee Interaction Region (IR). Interacting beams excite electromagnetic waves in the complicated geometry of the beam chamber. We discuss a possibility to design a chamber with a minimum RF impedance and suggest using HOM absorbers in the IR to capture the main part of the excited electromagnetic waves.
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Pierluigi Bruzzone (EPFL-SPC)11/04/2018, 14:10Magnets
For space and cost reasons, the Nb3Sn accelerator magnets for FCC should be graded. The joint between the two conductor grades should be conveniently done before the heat treatment (wind-and-react joints) for a compact design, without fragile protrusions from the winding packs. In collaboration between CERN and the Swiss Plasma Center (SPC) an R&D program is carried out to develop reliable,...
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Thomas Hohn (Graz University of Technology (AT))11/04/2018, 14:20
Power quality is today a primary concern for the operation of CERN’s particle accelerators, and its importance will even increase for the FCC. Nowadays, transient voltage dips, generally coming from the 400 kV network, frequently cause undesired stops of the accelerators and, consequently, are a major contributor for accelerator downtime. Due to its much larger extent, the FCC will be exposed...
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Dr Giacomo Ortona (Centre National de la Recherche Scientifique (FR))11/04/2018, 14:20FCC-hh Phy/Exp
An important test of the Standard Model (SM) electroweak symmetry breaking sector is the measurement of the Higgs self-interactions. Sensitivity to the Higgs self-coupling for mH = 125 GeV is evaluated through the measurement of the non-resonant di-Higgs production final states. The considered decay channels are HH→ bb\gamma\gamma, 4b+jet, bb\tau\tau, and bbVV, where V=W and Z. For the...
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Alessandro Drago (INFN)11/04/2018, 14:25FCC-ee ACC
The bunch by bunch feedback systems for FCC-ee shall be designed on the basis of the experience developed working on the lepton circular colliders in the last two decades. Along the past years a common way to approach these systems has been carried on for PEP-II, KEKB, DAFNE, and, later, for SuperB and SuperKEKB. Nevertheless the advance of the technology as well as the very high performance...
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Friedrich Lackner (CERN)11/04/2018, 14:30Magnets
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Masamitsu Aiba (Paul Scherrer Institut (CH))11/04/2018, 14:40FCC-ee ACC
FCC-ee collider rings necessitate top-up injection due to the short luminosity lifetime. Previous studies revealed that the conventional and multipole-kicker injection schemes are applicable. The designs of the injection straight section based on these schemes have been elaborated and will be presented. Further investigations, including feasibility of injection devices, filling scheme, failure...
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Volker Mertens (CERN)11/04/2018, 14:40
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Alexander Kovalenko (Joint Institute for Nuclear Research)11/04/2018, 14:45Magnets
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Andreas Papaefstathiou (University of Amsterdam (NL))11/04/2018, 14:45FCC-hh Phy/Exp
Investigating the physics of the top quark at the Future Circular hadron-hadron Collider (FCC-hh) is a very exciting prospect. Considering that at the FCC-hh the QCD top-quark production cross section will be 40 times larger than in the LHC, there is a lot of potential for unveiling possible connections with Beyond-the-Standard Model phenomena. In this talk we will discuss the sensitivity of...
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Prof. Yifang Wang (IHEP, CAS)11/04/2018, 15:30FCC-ee ACC
In this talk CEPC CDR design status with timeline will be presented which includes parameters, beam-beam simulation, collidering ring lattice design, dynamic apertures, booster design, SCRF system design for both collider ring and booster, linac injector design, MDI design, power consumption, site selections, etc. As for CEPC R&D status and plan for TDR will be presented also. Other issues...
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Elisabeth Renner (Vienna University of Technology (AT))11/04/2018, 15:30FCC-hh INJ
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Clement Helsens (CERN)11/04/2018, 15:30FCC-hh Phy/Exp
"The feasibility of a future proton-proton collider (FCC-hh), with center of mass energies up to 100 TeV and unprecedented luminosity is currently being studied.
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By delivering an integrated luminosity of few tens of ab-1, such a machine will provide an outstanding discovery potential for new physics, far beyond the reach of high luminosity or high energy LHC. In this talk we will discuss... -
Arto Niemi (CERN)11/04/2018, 15:30
This contribution presents FCC-hh operational schedule, turnaround cycle and availability goals. To maximize the physics output, the plan is to limit considerably the reserved time for maintenance and commissioning in the FCC schedule. The possibility of performing the annual maintenance stop in two months is discussed. FCC is designed to achieve about 50 % physics efficiency, which implies a...
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Daniel Schoerling (CERN)11/04/2018, 15:30Magnets
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Clement Lorin (Université Paris-Saclay (FR))11/04/2018, 15:45Magnets
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Yiwei Wang11/04/2018, 15:50FCC-ee ACC
CEPC is the future Circular Electron and Positron Collider proposed by China to mainly study the Higgs boson. This paper will present the bean optics design of the collider ring for the concept design report. The compatible beam optics for W and Z mode will be presented as well.
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Andrea Apollonio (CERN)11/04/2018, 15:55
This contribution will present the conclusions from the availability studies for the Future Circular Collider and the estimated performance in terms of luminosity production. A final assessment of availability budgets for individual system will be given, providing guidelines to support system design in the future. Emphasis will be put on the recommendations for further studies and R&D in the...
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Attilio Milanese (CERN)11/04/2018, 15:55FCC-hh INJ
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Alexandre Mehdi Louzguiti (CERN)11/04/2018, 16:00Magnets
The Future Circular Collider (FCC) will require 696 double aperture lattice sextupoles, 9336 single aperture sextupole corrector magnets and 480 double aperture octupoles. The tunnel length and the overall integrated field of the main dipoles have to be kept constant so that the FCC can both reach the specified centre of mass collision energy and fit into the Geneva basin. Considering these...
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Loukas Gouskos (Univ. of California Santa Barbara (US))11/04/2018, 16:00FCC-hh Phy/Exp
A proton-proton collider at 100 TeV center-of-mass energy opens up new territory at the energy frontier. Measurements in this energy regime would allow us to test the structure of the Standard Model (SM) with unprecedented precision, as well as enable searches for physics beyond the SM (BSM) involving very massive particles. One of the most appealing BSM theories is supersymmetry (SUSY). The...
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Meng Cai (Institute of High Energy Physics)11/04/2018, 16:05FCC-ee ACC
Circular Electron-Positron Collider (CEPC) is a 100 km ring e+ e- collider for a Higgs factory. The injector of CEPC is composed of linac and booster. The linac is a normal conducting S-band linac with frequency in 2856.75 MHz and provide electron and positron beam at an energy up to 10 GeV with bunch charge larger than 1.5 nC and repetition frequency in 100 Hz. The linac design will be...
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Toru Ogitsu11/04/2018, 16:15Magnets
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Dr Angelo Infantino (CERN - EN/STI-FDA)11/04/2018, 16:15
In the past years, a considerable amount of work has been performed in Radiation-to-Electronics (R2E) field for LHC. The CERN’s R2E-project is currently involved in the study of the critical areas for electronics for FCC. Indeed, FCC will require a significant amount of electronic components in the accelerator tunnel and in the side galleries to control and monitor different systems, e.g....
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Ryu Sawada (University of Tokyo (JP))11/04/2018, 16:20FCC-hh Phy/Exp
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11/04/2018, 16:20FCC-hh INJ
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m Koratzinos (Massachusetts Inst. of Technology (US))11/04/2018, 16:20FCC-ee ACC
The requirements for the Final Focus Quadrupoles of FCC-ee are very stringent in terms of field quality and compactness of the design. We are happy to report that we have a design based on the Canted Cosine Theta concept that fullfills all requirements: Very compact design (distance of magnetic centres of the two quadrupoles at the tip 66mm), excellent field quality (less than 0.1units in all...
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Stefania Farinon (INFN e Universita Genova (IT))11/04/2018, 16:30Magnets
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Markus Widorski (CERN)11/04/2018, 16:35
The studies for the Future Circular Collider have converged to a baseline layout and to technical concepts, as the foundation for the conceptual design report. Radiation Protection studies have accompanied the definitions of the civil engineering layout and engineering choices in the different parts of the FCC study. We will present the results of the studies performed for the radiation...
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Ilkay Turk Cakir (Istanbul Aydin University)11/04/2018, 16:35FCC-hh Phy/Exp
Possible extensions of the Higgs sector can be searched for a wide range of parameter space in the high energy proton-proton collisions. We have studied the charged Higgs boson single production within the framework of two Higgs doublet model in the proton-proton collisions at the FCC-hh collider. The production of charged Higgs boson through pp->H±X process is explored in the mass range 0.5...
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Toshiyuki Mitsuhashi (KEK)11/04/2018, 16:35FCC-ee ACC
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Yuancun Nie (CERN)11/04/2018, 16:40FCC-hh INJ
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Vadim Kashikhin (Fermilab)11/04/2018, 16:45Magnets
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Prof. Chris van den Broeck (NIKHEF)11/04/2018, 17:30
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Prof. Els Koffeman (University of Amsterdam)11/04/2018, 17:55
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Prof. Peter Christianen (High Magnetic Field Laboratory, Radboud University Nijmegen)11/04/2018, 18:20
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Dr Marc Dhallé (University of Twente)11/04/2018, 18:45
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Armen Apyan12/04/2018, 08:30
High energy upgrade is foreseen for LHC in the future. At the High-Energy LHC (HE-LHC), the proton beam energy is increased to an upgrade value of 13.5 TeV. The dedicated beam dump per ring must absorb 1.3 GJ energy carried by the proton beam and concentrated in the small region around the beam axis. Beam dilution system is foreseen in order to reduce maximum deposited energy density to an...
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Erwin Roland Bielert (Univ. Illinois at Urbana Champaign (US))12/04/2018, 08:30FCC-hh Phy/Exp
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Oliver Bruning (CERN)12/04/2018, 08:30FCC-eh
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Yannis Papaphilippou (CERN)12/04/2018, 08:30FCC-ee INJ
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Andre Henriques (CERN)12/04/2018, 08:30
In the process of defining project alternatives for the cross section of the tunnel, safety aspects are an important factor. However, because of the unique nature of this infrastructure, the prescriptive requirements specified in the applicable legislative references often appear inappropriate. For some specific risks, identified in a hazard register, a set of standard best practices are not...
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Elisabeth Renner (Vienna University of Technology (AT))12/04/2018, 08:50
To safely and reliably extract the high energy FCC-hh beam is a challenge for the extraction and dilution kicker system and has a major impact on the design. A high segmentation is proposed for both the extraction and the dilution kicker magnets to reduce the impact of one erratic module and to enable operation with less than nominal kick strength. The main challenge for the extraction kicker...
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Zbynek Drasal (CERN)12/04/2018, 08:50FCC-hh Phy/Exp
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John Andrew Osborne (CERN)12/04/2018, 08:55FCC-eh
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Oriol Rios Rubiras (CERN)12/04/2018, 08:55
The fire safety assessment for the FCC tunnel has been carried by means of Performance Based Design (PBD) analysis. Following this methodology, the FCC baseline design was challenged with different accidental fire scenarios representing credible fires in the underground tunnel structure to quantify the effectiveness of the foreseen fire protection measures. The safety goals for Life,...
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Salim Ogur (CERN)12/04/2018, 08:55FCC-ee INJ
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Tessa Charles (University of Melbourne (AU))12/04/2018, 09:10FCC-ee INJ
Coherent Synchrotron Radiation (CSR) encountered in the FCC-ee injector bunch compressor can lead to transverse emittance dilution, undoing some of emittance reduction from the damping ring. The bunch compressor is required to reduce the RMS bunch length from 5 mm to 0.5 mm, prior to injection into the linac. This is achieved through a dogleg comprised of two triple-bend achromats (TBA)...
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Anton Lechner (CERN)12/04/2018, 09:10
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Estel Perez Codina (CERN)12/04/2018, 09:10FCC-hh Phy/Exp
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Roman Martin (CERN)12/04/2018, 09:15FCC-eh
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Silvia Alejandra Arias Osuna12/04/2018, 09:20
Evacuation is one of the biggest challenges for the fire safety design for the Future Circular Collider (FCC). The configuration of the accelerator, where the distance to the nearest exit to the surface might be up to several kilometers, requires an evacuation design that ensures the occupants move away from the location of the fire, even if they do not know where it is located. An evacuation...
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Anna Zaborowska (CERN)12/04/2018, 09:25FCC-hh Phy/Exp
"Calorimetry with liquid argon as the active medium has been chosen as the baseline technology for large parts of the FCC-hh calorimeters. This includes the barrel electromagnetic (EM) calorimeter, the endcap EM and hadronic calorimeter and the forward calorimeter. These calorimeters have to meet the requirements of high radiation hardness and must be able to deal with a very high number of...
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Ozgur Etisken (Ankara University (TR))12/04/2018, 09:25FCC-ee INJ
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Walid Kaabi (CNRS-IN2P3)12/04/2018, 09:35FCC-eh
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Bastian Harer (CERN)12/04/2018, 09:40FCC-ee INJ
The FCC-ee booster synchrotron is a 97.75 km long full energy injector performing continuous top-up injection, since the beam lifetime of the collider is very short because of beamstrahlung and radiative Bhabha scattering.
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This talk presents the two optics foreseen to obtain similar emittances as in the collider at different operation modes. Particular emphasis is put on the investigation of... -
Silvia Alejandra Arias Osuna12/04/2018, 09:45
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William James Fawcett (Universite de Geneve (CH))12/04/2018, 09:45FCC-hh Phy/Exp
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Tony Price (University of Birmingham (GB))12/04/2018, 10:30FCC-hh Phy/Exp
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Dorothea Fonnesu (CERN)12/04/2018, 10:30EASItrain
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Uta Klein (University of Liverpool (GB))12/04/2018, 10:30FCC-eh
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Angelo Infantino (CERN - EN/STI-FDA)12/04/2018, 10:30
FCC will require a significant amount of electronic components in the accelerator tunnel and in the side galleries to control and monitor different systems, e.g. power converters, QPS, interlocks, etc. An “a priori” evaluation of the radiation environment, the technology that would be required, the failure rate and the possible mitigation actions become strategic for the design, the future...
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Eliana Gianfelice-Wendt (Fermi National Accelerator Lab. (US))12/04/2018, 10:30FCC-ee ACC
For precise beam energy measurements at 45 and 80 GeV
the use of resonant depolarization
has been suggested for FCC e+e-.The principle behind resonant depolarization is that a
vertically polarized beam excited through an oscillating horizontal magnetic field
gets depolarized when the excitation frequency is in a given relationship with the beam
energy.The studies of the possibility of...
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Aisha Saba12/04/2018, 10:40EASItrain
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Nickolai Muchnoi, Николай Мучной12/04/2018, 10:45FCC-ee ACC
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Ruben Garcia Alia (CERN)12/04/2018, 10:48
Radiation effects on electronics pose a serious threat to the operation of a high-energy hadron accelerator such as the present LHC and future FCC-hh machines. In particular, Single Event Effects (SEEs) are the result of the interaction of a single particle with the sensitive volume of a component that compromise its operation and can even result in its permanent destruction in the case of...
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Monica D'Onofrio (University of Liverpool (GB))12/04/2018, 10:50FCC-eh
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Dmitry Tikhonov (Helmholtz-Zentrum Berlin für Materialien und Energie)12/04/2018, 10:50EASItrain
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Coralie Neubuser (CERN)12/04/2018, 10:50FCC-hh Phy/Exp
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Jean Francois Croteau12/04/2018, 11:00EASItrain
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Dr Anton Bogomyagkov (Budker Institute of Nuclear Physics (RU))12/04/2018, 11:00FCC-ee ACC
The goal of beam energy calibration is to define central mass energy at the interaction point (IP). The most accurate method is resonant depolarization technique with relative error of 1 ppm in single beam energy calibration. The whole procedure consists of measurement of spin precession frequency, and calculations of beam energy averaged over circumference, beam energy at IP and central mass...
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Giulio Borghello (Universita degli Studi di Udine (IT))12/04/2018, 11:06
Particle detectors for high-energy physics applications can contain billions of MOS transistors, each of them prone to possible radiation-induced failures. The Future Circular Collider represents an unprecedented challenge to the radiation hardness of CMOS technology, with an estimated total ionizing dose (TID) from 10 to 500 times higher than the already very high TID expected to be reached...
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Vanessa Garcia Diaz12/04/2018, 11:10EASItrain
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Hubert Kroha (Max-Planck-Institut fur Physik (DE))12/04/2018, 11:10FCC-hh Phy/Exp
The design of a muon detector and first-level muon trigger system for the FCC-hh baseline experiment is presented. Drift-tube chambers operated with Ar:CO2 (93:7) gas mixture at 3 bar provide a robust and cost effective solution for precise track point and angle measurement over large areas (about 1200 square meters) with the required resolution of better than 50 µm and 70 µrad, respectively....
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Tobias Tydecks (CERN)12/04/2018, 11:15FCC-ee ACC
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Orhan Cakir (Ankara University (TR))12/04/2018, 11:15FCC-eh
The top quark flavor changing neutral current (FCNC) processes are extremely suppressed within the standard model (SM), however they could be enhanced in a new physics model beyond the SM. The top quark FCNC interactions would be a good test of new physics at present and future colliders. For a wide framework of these models, these interactions can be described by the effective Lagrangian. In...
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Stewart Bristow Leith12/04/2018, 11:20EASItrain
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Georgi Gorine (EPFL - Ecole Polytechnique Federale Lausanne (CH))12/04/2018, 11:24
Current solid-state devices for radiation measurement are not capable of integrating the radiation levels expected in certain sectors of the FCC tunnel (tens of KGy with >1015 particles/cm2) and even more in the experiments of the FCC (tens of MGy, with >1017 particles/cm2). In order to overcome these measurement limitations, we have focused our research on metal nanolayers, as a solution for...
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Ivan Koop (BINP)12/04/2018, 11:30FCC-ee ACC
Both future 100 km in circumference electron-positron colliders CEPC and FCC-ee want know beams energies with the extreme precision of 1-2 ppm. This can be done only with the help of the well-known resonant depolarization technique. Still, some beam parameters of these machines, like energy spread and radiative damping decrements, becomes so high near or above 80 GeV per beam, that it is...
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Simone Bologna (University of Bristol (GB))12/04/2018, 11:30FCC-hh Phy/Exp
Data acquisition has always been a significant challenge at a hadron collider. The combination of high luminosity and finely segmented detectors yields data rates that far exceed what can be stored permanently. The problem has traditionally been solved using a trigger system, that performs event selection online. In many cases, the trigger system has relied on dedicated detectors, or detectors...
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Peter Kostka (University of Liverpool (GB))12/04/2018, 11:35FCC-eh
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Federico Roncarolo (CERN)12/04/2018, 11:42
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Alain Blondel (Universite de Geneve (CH))12/04/2018, 11:45FCC-ee ACC
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Cedric Garion (CERN)12/04/2018, 13:30
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Philippe Lebrun (European Scientific Institute (FR))12/04/2018, 13:30EASItrain
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Ivan Karpov (CERN)12/04/2018, 13:30EuroCirCol
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Frank Zimmermann (CERN)12/04/2018, 13:30HE-LHC
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Clement Helsens (CERN)12/04/2018, 13:30Common detector
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Niloufar Alipour Tehrani (CERN)12/04/2018, 13:40Common detector
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Johannes Gnilsen12/04/2018, 13:45EASItrain
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Rogelio Tomas Garcia (CERN)12/04/2018, 13:48HE-LHC
Doubling the energy reach of the LHC by upgrading magnets with niobium-tin technology challenges optics design in several aspects. The machine layout and transverse dimensions have to fit in the existing tunnel. The larger energy swing together with features from the new niobium-tin technology deteriorate magnetic field quality, affecting both the linear and non-linear beam dynamics. A large...
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Toms Torims (Riga Technical University)12/04/2018, 13:50
Additive manufacturing technology and its applications steadily grew from the niche product to the multipurpose manufacturing solution, which today is being applied in many fields of mechanical engineering and machine building technologies. In particular laser cladding proved its high efficiency, precision and economic benefits in repair sectors of aerospace, automotive and ship repair...
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Oliver Boine-Frankenheim (TU Darmstadt)12/04/2018, 13:50EuroCirCol
The impedance model together with the status of electron cloud simulations for FCC-hh will be presented. Thresholds for transverse coupled bunch instabilities, for mode coupling instabilities and the requirements for Landau damping in FCC-hh will be discussed and compared to LHC.
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12/04/2018, 14:00EASItrain
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Valentin Volkl (University of Innsbruck (AT))12/04/2018, 14:00Common detector
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Leon Van Riesen-Haupt12/04/2018, 14:06HE-LHC
The High Energy LHC (HE-LHC) is one option for a next generation hadron collider explored in the FCC-hh programme. The core concept of the HE-LHC is to install FCC-hh technology magnets in the LHC tunnel. The higher beam rigidity and the increased radiation debris, however, impose severe challenges on the design of the triplet for the low beta insertions. In order to achieve 25 cm beta*...
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Sergey Arsenyev (CERN)12/04/2018, 14:10EuroCirCol
In comparison to the LHC beamscreen, the FCC beamscreen is more compact, has much larger pumping holes for achieving high vacuum, and incorporates a surface treatment for electron cloud mitigation. All of these factors can dramatically increase coupling impedance of the beamscreen. The impact on the coupled bunch and the single bunch instabilities is analysed. The necessary pumping hole...
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Mario Di Castro (CERN)12/04/2018, 14:10
Intelligent robotic systems are becoming essential for inspection and measurements in harsh environments, such as the European Organization for Nuclear Research accelerators complex. Aiming at increasing safety and machine availability, robots can help to perform repetitive or dangerous tasks, reducing the risk of personnel exposure to radiation and the time for interventions. In this work, a...
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Alice Moros12/04/2018, 14:15EASItrain
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Julia Hrdinka (Vienna University of Technology (AT))12/04/2018, 14:20Common detector
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Brennan Goddard (CERN)12/04/2018, 14:24HE-LHC
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Jani Paavo Olavi Komppula (CERN)12/04/2018, 14:25EuroCirCol
Transverse feedback systems are used for injection oscillation damping and transverse coupled bunch instability mitigation. The FCC-hh sets new challenges in comparison to the LHC due to the more rigid beam during the injection and the faster coupled bunch instability growth rate, which mitigation relies increasingly on the transverse feedback system. In this presentation, the performances of...
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Francois Millet12/04/2018, 14:30
The preliminary conceptual design of FCC-hh refrigerators was proposed in the framework of an international collaboration and confirmed through the industrial engineering studies undergoing with the cryogenic world-leader industries. Proposed cryoplants (10 cooling units of 100kW equivalent at 4.5K) are based on advanced refrigeration process cycles with very large capacity precooling stages...
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Mattia Ortino (TU Wien (Vienna))12/04/2018, 14:30EASItrain
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Colin Bernet (IPNL/CNRS (Lyon))12/04/2018, 14:40Common detector
Particle flow combines the information from all subdetectors for an optimal reconstruction of all particles in the final state of the collision: charged hadrons, photons, neutral hadrons, electrons, and muons. This technique demonstrated superior performance in past and present experiments, both in ee and pp collisions (ALEPH, CMS), and is now envisioned for future collider experiments. The...
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Jacqueline Keintzel (Vienna University of Technology (AT))12/04/2018, 14:42HE-LHC
Design of the HE-LHC, which will reach approximately twice the centre of mass energy of the LHC, in an already existing tunnel is challenging for optics design.
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To efficiently generate lattices with different parameters, strong effort has been put in developing an automatic lattice generation application. By focusing on two different arc options, namely 18 or 23 cells per arc, merits are... -
Lotta Mether (EPFL - Ecole Polytechnique Federale Lausanne (CH))12/04/2018, 14:45EuroCirCol
Electron clouds can cause several unwanted effects, in particular beam instabilities, emittance growth and tune shifts, as well as additional heat load on the cryogenic system and vacuum degradation. These effects can most efficiently be mitigated by suppressing the formation of electron clouds. In this contribution we present the required conditions for sufficient electron cloud suppression...
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Marco Prioli (CERN)12/04/2018, 15:30
For the FCC-hh study, 100 TeV is the target center of mass energy. This ambitious target can be reached by means of a 16 T dipole field and a 100 km long accelerator circumference. The target performances of dipole magnets, together with the unprecedented size of the accelerator, poses a number of challenges as, among others, machine integration and protection.
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In particular, long strings of... -
Matteo Centis Vignali (CERN)12/04/2018, 15:30Common detector
This talk summarizes the results and activities of the RD50 collaboration in the development of silicon detectors for hadron colliders. The focus of the collaboration is the improvement of the detectors' radiation hardness, with an emphasis on high-luminosity LHC applications. The radiation damage mechanisms of silicon detectors are introduced, together with the activities to develop models...
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Daria Astapovych (TU Darmstadt)12/04/2018, 15:30EuroCirCol
Electron clouds pose an intensity and luminosity limitation for proton beams in LHC and its upgrades.
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The limitations are due to electron cloud induced heat loads, instabilities and also incoherent beam intensity effects. At present, electron cloud induced effects are well controlled in LHC using different counter-measures, like for example coatings and bunch filling pattern, together with... -
Andrea Vitrano12/04/2018, 15:30EASItrain
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Jose Abelleira (JAI Oxford)12/04/2018, 15:30HE-LHC
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Tatiana Pieloni (EPF Lausanne)12/04/2018, 15:45EuroCirCol
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Jakub Tkaczuk12/04/2018, 15:45EASItrain
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Matthew Paul Crouch (CERN)12/04/2018, 15:48HE-LHC
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Tomasz Podzorny (CERN)12/04/2018, 15:50
Quench protection systems are an indispensable asset for the safety and integrity of the components of the FCC superconducting circuits. This contribution focuses on the quench detection (QDS) system. A design study for the QDS proposes main processing units located outside the FCC tunnel and interconnected with high-speed data links to intelligent sensors with reduced complexity and hence...
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Linn Kretzschmar (WU Vienna)12/04/2018, 16:00EASItrain
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Michael Campbell (CERN)12/04/2018, 16:00Common detector
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Vasilios Karaventzas (CERN)12/04/2018, 16:05
An alternative energy extraction system of the FCC superconducting circuits capable of energy recuperation is proposed. This system is suggested to comprise a converter module, which by controlling the extraction voltage across the magnet chain will determine the energy extracted and transferred to a temporary storage unit, before being re-used e.g. for the following energy ramp. The...
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Michael Hofer (Vienna University of Technology (AT))12/04/2018, 16:06HE-LHC
As part of the Future Circular Collider (FCC) study, a high energy upgrade of the LHC (HE-LHC) is studied. Putting this accelerator with twice the center of mass energy in the existing LHC-tunnel relies on the 16 T dipoles developed for the FCC-hh. Using recent field quality tables of these niobium-tin magnets, the dynamic aperture for different injection energies and two lattices is...
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Claudia Tambasco (EPFL - Ecole Polytechnique Federale Lausanne (CH))12/04/2018, 16:10EuroCirCol
In proton colliders, Landau octupoles are used to provide the necessary Landau damping of transverse coherent beam instabilities driven by the impedance. During the operational cycle the tune spread provided by the Landau octupoles may be modified when in presence of beam-beam interactions. Transverse beam stability studies for the FCC-hh operational cycle will be explored using Landau...
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Sofiya Savelyeva (TU Dresden (DE))12/04/2018, 16:15EASItrain
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Yuancun Nie (CERN)12/04/2018, 16:20
With a machine protection system similar to the Large Hadron Collider (LHC), the Future Circular Collider (FCC) would require up to three turns’ to dump the beam synchronously after detection of a failure. The reaction time of the machine protection system can be reduced by several strategies. The time for failure detection can become shorter with faster hardware and beam monitors, e.g. using...
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David Amorim (CERN / Universite Grenoble-Alpes (FR))12/04/2018, 16:24HE-LHC
A first version of the HE-LHC impedance was derived from the LHC and HL-LHC impedance models. In these models, two main sources of impedance are considered: the beam screen and the collimation system. The proposed injection energies were evaluated with respect to impedance and transverse beam stability. Because of the tighter physical gaps in the collimators at top energy (13.5 TeV), the...
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Paolo Giacomelli (INFN Sezione di Bologna)12/04/2018, 16:30Common detector
The Muon system of a FCC detector, both for the leptonic as well as for the hadronic collider, will have to cover an area of several thousands of square meters and possess accurate time and coordinate resolutions in order to provide a precise momentum resolution. The muon detector will also need to provide a standalone muon trigger, bunch crossing identification and be able to match muons...
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Maxime Pierre Podeur12/04/2018, 16:30EASItrain
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Francisco Rafael Blanquez Delgado (CERN)12/04/2018, 16:40
For the success of the FCC, one of the key aspects is the energy efficiency. In particular, the magnet powering could represent an enormous power consumption from the AC network, therefore achieving an optimised and efficient design for all power converters is a primary concern.
In this presentation, the main concepts and requirements for the power converters for the dipole magnets of the FCC...
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Lotta Mether (EPFL - Ecole Polytechnique Federale Lausanne (CH))12/04/2018, 16:42HE-LHC
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Evgeny Levichev (Budker Institute of Nuclear Physics (RU))13/04/2018, 08:30FCC-ee ACC
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Barbara Dalena (Université Paris-Saclay (FR))13/04/2018, 08:50FCC-hh ACC
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Leon Van Riesen-Haupt13/04/2018, 09:10HE-LHC
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Joanna Louise Stanyard (CERN)13/04/2018, 09:30I&O
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Jose Miguel Jimenez (CERN)13/04/2018, 09:45STP
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Daniel Schoerling (CERN)13/04/2018, 10:00Magnets
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Erk Jensen (CERN)13/04/2018, 10:15SRF
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Patrizia Azzi (INFN Padova (IT))13/04/2018, 11:00FCC-ee Phy/Exp
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Michele Selvaggi (CERN)13/04/2018, 11:20FCC-hh Phy/Exp
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Uta Klein (University of Liverpool (GB))13/04/2018, 11:40FCC-eh
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Michael Benedikt (CERN)13/04/2018, 12:00
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Cristian Pira (LNL-INFN)SRF
A key challenge for the next accelerators is the cost reduction. Bulk niobium cavities performances are closer to their theoretical limits and an alternative technology is mandatory. Niobium thin film copper cavities are the most explored solution, but the Q-slope problem, characteristic of these resonators, limits the applications where high accelerating fields are requested.
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In this work an... -
Francesco Cerutti (CERN)
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Klaus Schlenga (Bruker EST)EASItrain
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EuroCirCol
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Elisabeth Renner (Vienna University of Technology (AT))FCC-hh INJ
The design of the FCC-hh extraction systems is driven by the challenge to safely extract the 50 TeV proton beam. The new baseline for the beam dump system design foresees a fast single plane extraction realized by a highly segmented kicker system and a combination of SuShi (Superconducting Shield) and superconducting Cosine-Theta septa. In the dumpline a focusing structure is included to...
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Elisabeth Renner (Vienna University of Technology (AT))EuroCirCol
Due to the high energy of the injected FCC-hh proton beam (1.3 or 3.3 TeV) a detailed evaluation of the injection design regarding potential failure cases is of major importance. Further attention has to be given to the fact that the injection is – as in LHC - located upstream of the side experiments.
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Resulting design and hardware specifications for the extraction from the High Energy... -
Teresa Puig (ICMAB)EuroCirCol
The baseline design of the FCC-hh beam screen is based on an octagonal shaped stainless steel tube coated in its interior with copper. The surface impedance of the beam screen has a strong impact on the beam stability. In the foreseen operating temperature range between 40 K and 60 K the intended coating might not guarantee an impedance sufficiently low for a stable beam. This motivates the...
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