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Ursula Bassler30/05/2022, 09:30Oral presention (by invitation only)
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Philippe CHOMAZ30/05/2022, 09:40Oral presention (by invitation only)
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Fabiola Gianotti (CERN)30/05/2022, 09:50Oral presention (by invitation only)
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Eliezer Rabinovici (Weizmann Institute of Science (IL))30/05/2022, 10:05Oral presention (by invitation only)
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Florencia Canelli (University of Zurich (CH)), Dr Gregor Haefliger30/05/2022, 10:20Oral presention (by invitation only)
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Anne-Isabelle Etienvre (Université Paris-Saclay (FR))30/05/2022, 10:35Oral presention (by invitation only)
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Gregorio Bernardi (APC Paris CNRS/IN2P3)30/05/2022, 10:50
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Jean-Eric Paquet (European Commission)30/05/2022, 11:20Oral presention (by invitation only)
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Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin))30/05/2022, 11:50Oral presention (by invitation only)
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Michael Benedikt (CERN)30/05/2022, 14:00Oral presention (by invitation only)
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Frank Zimmermann (CERN), Tor Raubenheimer (SLAC National Accelerator Laboratory (US))30/05/2022, 14:30Oral presention (by invitation only)
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Matthew Philip Mccullough (CERN)30/05/2022, 15:15Oral presention (by invitation only)
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Felix Sefkow (Deutsches Elektronen-Synchrotron (DE))30/05/2022, 15:30Oral presention (by invitation only)
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Alain Blondel (Universite de Geneve (CH))30/05/2022, 15:40Oral presention (by invitation only)
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Gerardo Ganis (CERN)30/05/2022, 15:50Oral presention (by invitation only)
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Meenakshi Narain (Brown University (US))30/05/2022, 16:30Oral presention (by invitation only)
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Andrzej Siemko (CERN)30/05/2022, 17:15Oral presention (by invitation only)
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Xinchou Lou (Chinese Academy of Sciences (CN))30/05/2022, 17:40Oral presention (by invitation only)
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Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))31/05/2022, 09:00Oral presention (by invitation only)
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Janusz Gluza (University of Silesia (PL))31/05/2022, 09:00
In its basic modes, FCC-ee is a factory for Z and W bosons, the Higgs scalar, top quarks and flavoured Standard Model particles. As a consequence, with FCC-ee we will be able to test in clean and precise experimental conditions the entire spectrum of the Standard Model electroweak physics programme. On top of that, the anticipated electroweak precision studies will allow us to set up a...
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Johannes Gutleber (CERN)31/05/2022, 09:00Oral presention (by invitation only)
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Prof. Massimo Florio (University of Milan)31/05/2022, 09:05
Increasingly funders of public investment in science and technology require applicants to demonstrate the expected socio-economic returns of their projects. While the scientific case is obviously the top priority for researchers when they propose a new project, it is helpful to know why and how the funders have an interest on impact studies, and what is the potential reward for scientists to...
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31/05/2022, 09:20
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Christoph Paus (Massachusetts Inst. of Technology (US))31/05/2022, 09:22Oral presention (by invitation only)
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Ms Sirtori Emanuela (CSIL Centre for Industrial Studies)31/05/2022, 09:25
Building on international practice and previous experience in evaluating the socio-economic impacts of Big Science projects, a model to estimate the future impacts of FCC-ee has been developed. This presentation will recall the definitions of the impact pathways considered and the fundamental assumptions used to perform the analysis.
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Michael Hofer (CERN)31/05/2022, 09:30
Since the last FCC Week conference, the layout of the FCC tunnel has been further optimized to provide a more favourable placement in the Geneva Basin.
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Compared to the layout used in the Conceptual Design Report, the new tunnel layout now features a slightly smaller circumference of 91 km, but is compatible with four experimental insertions.
In this presentation, we present the latest... -
Francesco Giffoni31/05/2022, 09:35
The FCC innovation study requires an analysis to better understand the impact that FCC-ee will have on supplier companies, and the mechanisms through which the procurement relationship might generate benefits for the industry. By capitalising on previous research on (HL-)LHC, the presentation provides preliminary results of a new analysis where the economic multiplier of the FCC-ee procurement...
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Jernej Fesel Kamenik (Jozef Stefan Institute (SI))31/05/2022, 09:44Oral presention (by invitation only)
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31/05/2022, 09:50
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Tessa Charles (University of Liverpool (GB))31/05/2022, 09:50
In order to achieve its ultra-low vertical emittance (1 pm) and high luminosity (of up to $230 \times 10^{34}$~cm$^{-2}$~s$^{-1}$ per collision point), the e$^+$e$^-$ Future Circular Collider (FCC-ee) requires a well-informed alignment strategy, powerful correction methods, and good understanding of the impact of vibrations. The large ring size, high natural chromaticity, small $\beta^*$, and...
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Gabriele Piazza, Riccardo Crescenzi31/05/2022, 10:00Oral presention (by invitation only)
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Stephane Monteil (LP Clermont)31/05/2022, 10:06Oral presention (by invitation only)
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Patrick James Hunchak31/05/2022, 10:10
In order to maximize the integrated luminosity of the FCC-ee, top-up injection will be employed. The positron and electron beams will be accelerated to the collision energy in the booster ring before being injected into the collider ring where it will merge with the stored beam. Regular injection maintains an effectively constant beam current and, other than a brief period during the injection...
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31/05/2022, 10:20
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Franck Peauger (CERN)31/05/2022, 11:00Oral presention (by invitation only)
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David d'Enterria (CERN)31/05/2022, 11:00
The Future Circular Collider (FCC) is a post-LHC project aiming at direct and indirect searches for physics beyond the SM in a new 100 km tunnel at CERN. In addition, the FCC-ee offers unique possibilities for high-precision studies of the strong interaction in the clean environment provided by e+e- collisions, thanks to its broad span of center-of-mass energies ranging from the Z pole to the...
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Mauro Migliorati (Sapienza Universita e INFN, Roma I (IT))31/05/2022, 11:00
Collective effects due to the high beam intensities in FCC-ee, in particular for the Z-pole configuration, are very important for reaching the design performance. While resistive wall represents a major source of impedance for such a large machine, also other contributions, such as that of the bellows with included RF fingers, cannot be neglected. We have studied the single beam instabilities...
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Ivan Karpov (CERN)31/05/2022, 11:20Oral presention (by invitation only)
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Emanuela Carideo (Sapienza Universita e INFN, Roma I (IT))31/05/2022, 11:20
Collective effects are very important for the FCC-ee collider due to very extreme parameters, such as the high beam current. Taking into account the updated impedance model, new results of beam dynamics simulations for FCC-ee will be presented. We will analyse the longitudinal microwave instability threshold studying bunch length and energy spread versus beam current, and TMCI, transverse mode...
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Philipp Roloff (CERN)31/05/2022, 11:22Oral presention (by invitation only)
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Ali Rajabi31/05/2022, 11:35Oral presention (by invitation only)
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Linhao Zhang (Chinese Academy of Sciences (CN))31/05/2022, 11:40Oral presention (by invitation only)
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Gauthier Durieux (CERN)31/05/2022, 11:44Oral presention (by invitation only)
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Yuan Zhang (IHEP-CAS)31/05/2022, 11:55Oral presention (by invitation only)
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Anne-Marie Valente-Feliciano31/05/2022, 11:55Oral presention (by invitation only)
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Jan Eysermans (Massachusetts Inst. of Technology (US))31/05/2022, 12:06Oral presention (by invitation only)
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Claire Antoine (CEA)31/05/2022, 12:15Oral presention (by invitation only)
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Dr Fatih Yaman (Izmir Institute of Technology (IYTE))31/05/2022, 12:15
In this work, we present updates on the electron cloud build-up studies considering various sections of the FCC-ee. Additionally, we report arc dipole & drift regions using the new baseline beam parameters for four IPs. Furthermore, estimated threshold central electron densities for the single-bunch instability are included. The electron density at the center of the beam pipe for 30 ns and 32...
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Tevong You (University of Cambridge)31/05/2022, 14:00
I will motivate the BSM theory case for the FCC physics programme and give a general outline of the various scenarios it will be able to explore to an unprecedented level.
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Antoine Chance (CEA Irfu)31/05/2022, 14:00Oral presention (by invitation only)
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Guillaume Jonathan Rosaz (CERN)31/05/2022, 14:00Oral presention (by invitation only)
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Sosoho-Abasi Udongwo31/05/2022, 14:09Oral presention (by invitation only)
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Marco Garlasche (CERN)31/05/2022, 14:18SRF Programme
Current strategy and ongoing activities will be presented, in relation to R&D and preparation of production for the elliptical cavities needed by FCC
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Rebeca Gonzalez Suarez (Uppsala University (SE))31/05/2022, 14:22PE&D
Invited talk
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Paolo Craievich31/05/2022, 14:25Oral presention (by invitation only)
In this contribution we will give an overview of the status of the design of the pre-injector complex and introduce the new layout that has been proposed by the study group working in the context of the CHART collaboration. A summary of the injector parameters focusing on the most challenging ones for the different injector sub-systems will also be presented.
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Gloria Bellini (Ministere des affaires etrangeres et europeennes (FR))31/05/2022, 14:27
In the frame of the Future Circular Collider (FCC) study, CERN is modelling the copper electropolishing process. The aim is to foresee and optimise the process parameters such as cathode geometry, bath flow and temperature, and minimum potential input, namely on the 400 MHz single cell FCC type cavities and thus contributing in achieving the ultimate performance on the Nb/Cu technology. In...
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Antonio Bianchi (CERN)31/05/2022, 14:36
Since the late 80’s, CERN has pioneered development of thin film superconducting radio-frequency cavities for particle accelerators. This technology, used in LEP II, LHC and more recently in HIE-ISOLDE, presents many advantages. As a consequence, many efforts are put in place at CERN in view of its potential implementation in the FCC machines. However, niobium thin film cavities historically...
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Suchita Kulkarni (University of Graz)31/05/2022, 14:44
The two stage FCC program with electron positron and proton proton collision offers a unique opportunity to search for long lived particles in a clean electron positron environment as well as in high energy high luminosity proton proton collisions. I take an overview of the opportunities for searching for long lived particles both at FCC-ee and FCC-hh. I present several examples of motivated...
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Simona Bettoni (Paul Scherrer Institut)31/05/2022, 14:45
In this presentation, I will give an overview of the beam dynamics simulations done to optimize the design of two of the linacs in the FCC-ee injectors’ complex. The first one accelerates electrons from 200 MeV up to 1.54 GeV, and for both electrons and positrons from 1.54 GeV up to 6 GeV. In particular, I will focus on some of the possible mechanisms of single-bunch emittance degradation and...
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Carlota Pereira Carlos (FCT Fundacao para a Ciencia e a Tecnologia (PT))31/05/2022, 14:45
The Future Circular Collider (FCC) study focuses on the design and technology developments of a new research infrastructure capable of hosting the next generation of particle colliders at CERN. CERN developed significant know-how in the design and fabrication of niobium-coated copper superconducting radiofrequency (SRF) cavities for accelerators, from the Large LEP, to the LHC, and HIE-ISOLDE....
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Lorena Vega Cid (CERN)31/05/2022, 14:54
The Nb/Cu SRF cavities offer several advantages with respect to the bulk Nb cavities. However, their application has been limited due to a degradation in the performance systematically observed at high accelerating gradients. In recent years, a vast R&D campaign has been devoted to the optimization of the manufacturing process of 1.3 GHz cavities at all levels, from the production of the...
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Alexej Grudiev (CERN), Andrea Latina (CERN), Hermann Winrich Pommerenke (CERN), Jean-Yves Raguin, Mattia Schaer, Nicolas Vallis (PSI/EPFL), Paolo Craievich31/05/2022, 15:00Oral presention (by invitation only)
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Thomas Proslier31/05/2022, 15:03Oral presention (by invitation only)
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Juliette Alimena (CERN)31/05/2022, 15:06
The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular tunnel built at CERN, and will serve as the first step towards ≥ 100 TeV proton-proton collisions. In addition to an essential and unique Higgs program, it offers powerful opportunities to discover direct or...
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Stewart Leith (CERN)31/05/2022, 15:12
CERN has successfully operated a number of Nb coated Cu cavities for a number of years, most notably in the LEP, LHC and HIE ISOLDE accelerators. In order to meet the requirements for the Future Circular Collider (FCC), an increase in the quality factor of the accelerating cavities, while maintaining the operating temperature of 4.5 K, is required. Because of its lower BCS resistance and...
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Hermann Winrich Pommerenke (CERN)31/05/2022, 15:15
The linacs of the FCCee injector complex will both provide the drive beam for position production and accelerate nominal electron and positron beams up to 6 GeV. Several linacs comprise different traveling-wave structures fulfilling the beam dynamics and RF constraints. High-phase advance large-aperture structures accelerate the positron beam at low energies. All structures are rotationally...
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31/05/2022, 15:21
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Clement Helsens (CERN)31/05/2022, 16:00Oral presention (by invitation only)
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Mr Yongke Zhao (CERN & Shandong University (CN))31/05/2022, 16:00
The presentation shows a simulation and optimisation of the FCC-ee positron source using a high-temperature superconducting (HTS) solenoid as the matching device to collect positrons downstream of the target. The conventional target scheme composed of simply a single tungsten is used. The target is placed inside the bore of the HTS solenoid to improve the positron yield. The position of the...
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Zaib Un Nisa Zaib Un Nisa (CERN)31/05/2022, 16:00
The innovative concept of two-stage multi-beam Klystron has been previously proposed and studied for a 1GHz 20MW Klystron for CLIC. This technology utilizes low voltage electron beam in its first stage to reduce the overall tube length, followed by DC post acceleration in the second stage to ensure ultra-high efficiency. This topology is very practical to provide compact design at a low...
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Barbara Humann (Vienna University of Technology (AT))31/05/2022, 16:15
For an electron-positron collider like FCC-ee, the production of positrons plays a crucial role. One of the design options considered for the FCC-ee positron source employs a superconducting solenoid made of HTS coils as an adiabatic matching device. A superconducting solenoid yields a higher peak field than a conventional flux concentrator, therefore increasing the achievable positron yield....
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Valentin Volkl (CERN)31/05/2022, 16:18Oral presention (by invitation only)
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Mr Franck Peauger (CERN), Graeme Campbell Burt (Lancaster University (GB)), Marc Timmins (CERN), Mathieu Therasse (CERN), Shahnam Gorgi Zadeh (CERN), Torsten Koettig (CERN)31/05/2022, 16:25
An innovative superconducting cavity topology has been recently proposed at CERN and at Lancaster University. It integrates longitudinal slots crossing perpendicularly the RF surface. The RF current lines run along the slots, inducing no perturbation of the accelerating mode. Thanks to this approach, the cavity can be built using halves or quadrants, which is well appropriate to precise...
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Antonio De Santis31/05/2022, 16:30
The current status of the DR design will be presented with an analysis of the impact of the timing scheme of the injection and its implication on the DR injection/extraction equipment, moreover, a review of the acceptance of the DR in the longitudinal and transverse planes will be analyzed and the implication for the positron source will be addressed.
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Shahnam Gorgi Zadeh (CERN)31/05/2022, 16:35Oral presention (by invitation only)
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Kunal Gautam (Vrije Universiteit Brussel (BE))31/05/2022, 16:36
One of the main objectives of FCCee is the precise measurements of Standard Model parameters, like the couplings of the Higgs boson to the bottom and charm quarks and gluons. This requires an efficient reconstruction and identification of the hadronic final states of these processes, which entails identifying the flavour of the parton that initiated the jet, referred to as jet-flavour tagging....
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Michal Duda31/05/2022, 16:45
This work presents the concept of the HTS solenoid-based adiabatic matching device for the CHART FCCee Injector study. The first results of in-house made and tested non-insulated HTS coils are shown.
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The CHART P-cubed project at Paul Scherrer Institut is the proposed proof-of-principle experiment for the FCC-ee positron source. The main challenge for this study is capture and transport... -
Marc Timmins (CERN)31/05/2022, 16:45Oral presention (by invitation only)
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Michele Selvaggi (CERN)31/05/2022, 16:54Oral presention (by invitation only)
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Mathieu Therasse (CERN)31/05/2022, 16:55Oral presention (by invitation only)
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Rebecca Louise Ramjiawan (CERN)31/05/2022, 17:00
The current proposal for the FCC-ee injector complex includes separate linacs to accelerate the electron and positron beams to 1.54 GeV, followed by a common linac to bring the beams to 6 GeV. Electron and positron transfer lines will be needed to connect these elements. There will be a damping ring for the 1.54 GeV positrons, after which a transfer line will transport the positron beam to the...
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Torsten Koettig (CERN)31/05/2022, 17:05Oral presention (by invitation only)
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Tristan Miralles (Université Clermont Auvergne (FR))31/05/2022, 17:12Oral presention (by invitation only)
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Nicolas Vallis (PSI/EPFL)31/05/2022, 17:15
P-cubed, currently in development at PSI, is the proposed proof-of-principle experiment for the FCC-ee positron source. Capture and transport of the secondary positron beam from the production target to the damping ring are a key challenge for FCC-ee, due to large emittance and energy spread. The use of novel matching and focusing methods has been studied, such as high temperature...
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Graeme Campbell Burt (Lancaster University (GB))31/05/2022, 17:15Oral presention (by invitation only)
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31/05/2022, 17:25
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Alain Blondel (Universite de Geneve (CH))01/06/2022, 09:00EPOL (E_c.m. calibration and polarization, monochromatization)Poster (one author must be in person)
The recent measurement of the W mass by the CDF collaboration at the Tevatron in hadron collisions has created a significant buzz in the community. Quite apart from the fact that it disagrees significantly both with the Standard Model predictions and with previous measurements of this quantity, this result is remarkable by two aspects:
- the systematic error is of the same size as the...
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Massimo Giovannozzi (CERN)01/06/2022, 09:00
In this talk, I review the current status of the FCC-hh ring layout and optics studies, starting from a brief overview of the CDR status and then moving to the recent developments. I also provide an outlook for future studies and activities.
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Johannes Gutleber (CERN)01/06/2022, 09:00Oral presention (by invitation only)
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Pierre Boillon01/06/2022, 09:15
The process of placing the ring has integrated from the beginning the Avoid - Reduce - Compensate approach.
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The purpose of the presentation is to illustrate concretely how the ARC approach was implemented for the placement :
- How to avoid the main impacts?
- How to reduce the residual impacts?
- How to anticipate potential compensation needs? -
Jacqueline Keintzel (CERN)01/06/2022, 09:20
The Future Circular electron-positron Collider, FCC-ee, is designed for unprecedented precision for particle physics experiments from the Z-pole to above the top pair threshold. This demands a precise knowledge of the center-of-mass energy (ECM) and collision boosts at all four interaction points.
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Synchrotron radiation losses range from 40 MeV per turn at the Z-pole with 45.6 GeV beam energy,... -
Dr Roderik Bruce (CERN)01/06/2022, 09:25
The FCC-hh will feature both an unprecedented stored proton beam energy
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of about 8.3 GJ, more than an order of magnitude higher than the HL-LHC,
as well as superconducting magnets. This puts extreme demands on the
collimation system that should safely intercept any beam losses, since
even a tiny fraction of the beam carries enough energy to quench the
magnets or even cause damage. This... -
Luisa Ulrici (CERN)01/06/2022, 09:35Oral presention (by invitation only)
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Katsunobu Oide (High Energy Accelerator Research Organization (JP))01/06/2022, 09:40Oral presention (by invitation only)
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Guilherme Telles01/06/2022, 09:45
Inside the vacuum chamber of the FCC-hh, image currents will be induced in the beam screen due to its proximity to the particle beam. To ensure a stable beam trajectory, it is important that the surrounding material has very low surface resistance and that the magnetic field homogeneity is maintained in the central region of the vacuum chamber. To achieve this, our consortium explores the...
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Patrycja Laidouni (CERN)01/06/2022, 09:55Oral presention (by invitation only)
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Aurelien Martens (Université Paris-Saclay (FR))01/06/2022, 10:00
Precise energy calibration is a key tool for the FCC-ee physics programme and will be obtained by resonant depolarization. It requires the implementation of a Compton polarimeter with unprecedented performance. The presentation is mainly devoted to the description of the foreseen laser performance and the associated challenges.
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Wolfgang Bartmann (CERN)01/06/2022, 10:05Oral presention (by invitation only)
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Daniel Willi (Federal Office of Topography swisstopo)01/06/2022, 10:15Oral presention (by invitation only)
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Mogens Dam (University of Copenhagen (DK))01/06/2022, 11:00Oral presention (by invitation only)
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John Andrew Osborne (CERN)01/06/2022, 11:00Oral presention (by invitation only)
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Jeremie Bauche (CERN)01/06/2022, 11:00
Coupled aperture magnet designs have been proposed for the dipole and quadrupole of the FCC-ee collider during the CDR phase. They are characterized by a high energy efficiency but the aperture coupling brings additional challenges to achieve the field quality requirements, in particular for the quadrupole when an active system is added to trim the field to the energy saw-tooth generated by...
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Andrea Moscariello (University of Geneva)01/06/2022, 11:30Oral presention (by invitation only)
For the design of FCC trajectory, a full understanding of the subsurface geology that will be crossed by both the tunnel and the access shafts is required. For this purpose a detailed knowledge of the regional distribution of rock mass composition and structural elements as well as the hydrogeological characteristics of the area should be achieved and summarised in a full-scale 3D geological...
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Andre Sailer (CERN)01/06/2022, 11:30
To consolidate the physics case for the FCCee, complete detector concepts are necessary to estimate the expected physics performance in view of the beam and background environments. The CLD detector concept offers the possibility to study background and physics events in full simulation with sophisticated particle flow clustering algorithms. This presentation will describe the CLD detector...
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Cedric Garion (CERN)01/06/2022, 11:30
The Future Circular Collider study program comprises several machine concepts for the future of high-energy particle physics. In particular, a twin-ring e-e+ collider capable to run at beam energies between 45.6 and 182.5 GeV is proposed as a first phase. The design of its two 100-km ring vacuum system has to deal with low-energy (45.6 GeV) high-current (1390 mA) version as well as the...
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Paolo Giacomelli (Universita e INFN, Bologna (IT))01/06/2022, 11:50
The future circular electron-positron collider (FCCee) is receiving much attention in the context of the FCC Feasibility Study currently in progress in preparation for the next EU strategy update. We present IDEA, a detector concept optimized for FCCee and composed of a vertex detector based on DMAPS, a very light drift chamber, a silicon wrapper, a dual readout calorimeter outside a thin 2...
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Davide Aguglia (CERN)01/06/2022, 12:00
Power converters are needed to supply all magnets and RF systems for the FCC-ee and FCC-hh. This needs to consider the required accelerator controllability and precision, as well as the electrical AC network power quality. The design procedure needs to minimise the total investment and operational costs (losses, availability, etc.). Aspects such as losses in underground areas, power converters...
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Timothy Paul Watson (CERN)01/06/2022, 12:00Oral presention (by invitation only)
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Martin Aleksa (CERN)01/06/2022, 12:10Oral presention (by invitation only)
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Rogelio Tomas Garcia (CERN)01/06/2022, 14:00Oral presention (by invitation only)
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Andrea Perez Fernandez (CERN)01/06/2022, 14:00Oral presention (by invitation only)
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Nicolas Morange (Université Paris-Saclay (FR))01/06/2022, 14:00Oral presention (by invitation only)
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Eva Montbarbon (Centre National de la Recherche Scientifique (FR))01/06/2022, 14:20
Very high luminosities at the production poles (z,w,h,t) of FCC-ee are planned at the four Interaction Points (IP); thus very low beta star values are required at the IP, implying the use of very strong quadrupoles. Concurrently, LAPP work has underlined the strong correlation between the vibrations of the quadrupoles due to ground motion amplified by the dynamics of the cryostat in cantilever...
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Auguste Guillaume Besson (Centre National de la Recherche Scientifique (FR))01/06/2022, 14:22Oral presention (by invitation only)
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Emmanuel Tsesmelis (CERN)01/06/2022, 14:30Oral presention (by invitation only)
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Georg Gassner (SLAC National Accelerator Laboratory)01/06/2022, 14:40
This presentation will briefly talk about error propagation in alignment networks in tunnels. It will also give a summary of alignment experiences that were reported at the FCC-ee optics tuning and alignment mini-workshop. Finally the presentation will show some results from SLAC in particular and the importance of alternate measurement methods added to conventional laser tracker and leveling...
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Wolfgang Friedrich Lohmann (Deutsches Elektronen-Synchrotron (DE))01/06/2022, 14:44
A design is presented for the instrumentation of the very forward region in future detectors at e+e- collider to perform a fast estimate and precise measurement of the luminosity, to improve the hermeticity and mask the central tracking detectors from backscattered particles. Two compact calorimeters are foreseen, LumiCal and BeamCal. Both are designed as sandwich calorimeters with very thin...
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John Hammersley01/06/2022, 15:00Oral presention (by invitation only)
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Simone Liuzzo (ESRF)01/06/2022, 15:05
The presentation will show the techniques developed to perform commissioning-like simulations for the ESRF-EBS upgrade. In particular alignment specifications are updated respect to the past. Instead of specifying girder-to-girder errors, simulated surveys of the storage ring were used, providing a more complete and simple to use information. Also, the relative impact of different magnet...
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Jacques Lefrancois (Université Paris-Saclay (FR))01/06/2022, 15:06Oral presention (by invitation only)
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Sebastien Guillaume, Sébastien Guillaume01/06/2022, 16:00Oral presention (by invitation only)
In short, Geodesy deals with two main topics. (1) The determination of the position of (all) objects on the Earth or in its vicinity. (2) The determination of the gravity field and its geometry. Since the beginning of mankind those tasks serve science and society. The first scientific question concerned the shape of the Earth, and the first societal application concerned the rational...
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Felix Simon Carlier (EPFL), Tatiana Pieloni (EPF Lausanne)01/06/2022, 16:00Oral presention (by invitation only)
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Peter Kicsiny (EPFL)01/06/2022, 16:15
The aim for the highest luminosities with the FCC-ee poses several constraints on the choice of the machine parameters. Unprecedented conditions are foreseen during beam-beam collisions which are expected to give rise to previously unseen dynamical mechanisms. The exploration and understanding of these effects as well as the identification of optimal working points are of crucial importance...
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Mr Adrian Ryf01/06/2022, 16:18
Building the FCC tunnel will require outstanding engineering expertise from all domains involved. Several anticipated challenges will be comparable only to those encountered during the construction of the longest existing tunnels like the Gotthard Base Tunnel put into operation in 2016. With its length of 57 km it is still the longest railroad tunnel in the world. Its length, the complex...
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Riccardo De Maria (CERN)01/06/2022, 16:30
The talk presents the status of MAD-X code and recent developments related in particular to FCC-ee studies.
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Julia Azumi Koch (ETHZ - Inst. Geodesy and Photogrammetry)01/06/2022, 16:36
For the construction and maintenance of large-scale infrastructure such as the Gotthard Base Tunnel or the CERN-FCC, it is vital to take into account the influence of the varying gravity field, because most geodetic measurements are referring to the local plumb lines and equipotential surfaces, deviating from purely geometrical positioning by e.g. GNSS.
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The so-called Geoid, an equipotential... -
Andrey Abramov (CERN)01/06/2022, 16:45
A conceptual design for a collimation system in the FCC-ee is currently under preparation. The current focus is the design of a betatron and off-momentum collimation system, housed in a single insertion. The latest collimation configuration under study is presented. The development of collimation simulation frameworks for the FCC-ee is covered. The frameworks are based on a coupling between a...
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Matej Varga01/06/2022, 16:54
The presentation will discuss the reasons why coordinate reference systems (CRSs) are needed for building and operating FCC. It will briefly summarize CERN's coordinate reference systems' diversity and historical heritage as well as the characteristics of the optimal coordinate reference system for the FCC. Additionally, key aspects for the implementation of the reference systems through...
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Leon Van Riesen-Haupt (CERN)01/06/2022, 17:00Oral presention (by invitation only)
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Benjamin Weyer (CERN)01/06/2022, 17:12
Building the FCC tunnel and installing each component of the machine at the intended location will be a challenging task relying notably on the quality and accuracy of the geodetic infrastructure. Before that, methods, tools and software must be developed to respond to the needs of the different parties taking part in the FCC feasibility studies.
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This presentation will first cover the... -
Helmut Burkhardt (Albert Ludwigs Universitaet Freiburg (DE))01/06/2022, 17:15Oral presention (by invitation only)
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Sarah Louise Williams (University of Cambridge (GB))01/06/2022, 17:30Oral presention (by invitation only)
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Caldwell Darwin (IIT)02/06/2022, 09:00
The world (both natural and man-made) is a complex, unstructured, cluttered and dynamically changing environment, in which humans and animals move across varying terrain (towns/cities, industrial infrastructures, countryside, forest, mountains, etc.) easily changing their gait, behaviours and motions, while performing simple and complex tasks involving coordination of the arms, body and legs....
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Yi Wu (EPFL - Ecole Polytechnique Federale Lausanne (CH))02/06/2022, 09:00Oral presention (by invitation only)
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Klaus Hanke (CERN)02/06/2022, 09:00
The base line for the RF system of FCC-ee is a combination of 400 and 800 MHz systems operating at 4.5 and 2 K respectively. The system is designed to evolve for the different working points of the machine. Taking into account constraints from beam physics, placement and infrastructure, we have identified two straight sections to house the cryomodules. This presentation outlines the...
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Ivan Koop (Budker Institute of Nuclear Physics (RU))02/06/2022, 09:20EPOL (E_c.m. calibration and polarization, monochromatization)Oral presention (by invitation only)
Two possible scenarios for measuring the frequency of spin precession in FCC-ee storage rings at the threshold of the birth of Z and WW-pairs are discussed. One of the scenarios involves the use of the well-known method of Resonant Depolarization of pilot bunches of the pre-polarized particles. While in the second approach it is proposed to use a powerful short-pulse RF magnet (flipper) to...
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Eloise Matheson (CERN)02/06/2022, 09:25
At CERN we heavily use robots for inspection, maintenance and repair tasks throughout our accelerator complex, facing challenges of hazardous environments, cluttered areas, changing conditions and limited communication channels. To support these activities, we invest in research and development in novel fields of hardware, sensors, vision, navigation, manipulation, communication and machine...
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Dr Fani Valchkova-Georgieva02/06/2022, 09:30
The Future Circular Electron–Positron Collider (FCC-ee) will be 91 km long and operate in a top-up mode where new beams are continuously injected into the collider. For this purpose, the collider tunnel will also house a 91 km long booster accelerator. During its life cycle, the FCC-ee will operate with different energies to study Z, W, and H bosons and the top quark. The Future Circular...
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Alain Blondel (Universite de Geneve (CH)), Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))02/06/2022, 09:40Oral presention (by invitation only)
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Kevin SUBRIN (Nantes Université)02/06/2022, 09:45
While the manufacturing industry is strongly engaged in robotization, the construction field is still facing important scientific and technical challenges in this area. Indeed, this sector requires that robots work in large spaces, in accurate ways, on very varied activities where know-how must be adapted to complex environments. Therefore, we present several industrial studies that Nantes...
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Angeles Faus-Golfe (IJClab IN2P3 CNRS-Université Paris-Saclay (FR)), Frank Zimmermann (CERN), Pantaleo Raimondi02/06/2022, 10:00Oral presention (by invitation only)
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Laurent Delprat (CERN)02/06/2022, 10:00
Now entering its phase II, the FCC Study capitalizes on the work of the Conceptual Design Report to refine its results, to serve as input for the next ESPP Update in 2026/2027.
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Considering recent adjustments that have been made to the accelerator conceptual design, the architecture of the cryogenic systems for both FCC-ee and -hh machines is currently under revision and shall be... -
Violeta Redondo Gallego (UPM)02/06/2022, 10:05
The most relevant challenges of telerobotics technologies for the coming years are precise manipulation in semi-structured environments, high levels of tightening torque, and reduced execution time. Also, an iterative design of remote handling processes is necessary to comply with maintenance requirements properly. Other aspects to consider are operator training and robot recovery strategies,...
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Manuela Boscolo (INFN e Laboratori Nazionali di Frascati (IT))02/06/2022, 11:00
The design of the interaction region of the positron-electron future circular collider must comply with various important constraints, imposed by high beam energy, high luminosity, need for polarization, and crossing scheme. An overview of the MDI design will be presented with a picture of the recent updates in the layout and ongoing studies. The status of the MDI activity will be summarised...
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Markus Hüning (DESY)02/06/2022, 11:00Oral presention (by invitation only)
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Jean-Paul Burnet (CERN)02/06/2022, 11:00Oral presention (by invitation only)
The FCC-ee will be the largest accelerator ever built with kilometers of different accelerator devices. The identification of the main loads is crucial for designing the electricity infrastructure and for evaluating its energy consumption. An update of the FCC power demand is ongoing with the evaluation of its annual energy consumption depending on the machine configurations. The next step is...
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Mogens Dam (University of Copenhagen (DK))02/06/2022, 11:20Oral presention (by invitation only)
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Andreas Schloegelhofer (Technische Universitaet Wien (AT))02/06/2022, 11:25
The beam parameters of FCC-ee with its high-intensity beams and large dynamic range lead to exceptional requirements for beam instrumentation devices. For high energy lepton machines, the detection of synchrotron radiation for the measurement of bunch length has been common practice in the past. However, given the exceptional size of FCC-ee, extracting synchrotron light comes with technical...
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Mario Parodi (CERN)02/06/2022, 11:30
The electrical infrastructure for the Future Circular Collider will be composed by a multi-layer transmission and distribution network covering all the power needs of the accelerator.
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The study for the network considers as main inputs the known users’ requirements and the target load figures of FCC-ee, the power availability of the electrical grid of the surrounding area and its long-term... -
Francesco Fransesini02/06/2022, 11:40Oral presention (by invitation only)
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Mr Alexander Krainer (CERN)02/06/2022, 11:45
Currently a semi-passive beam dilution system is foreseen for the FCC-ee beam dumping system. This system utilizes passive beam diluters (spoilers) made from carbon-based materials. To test the performance of these spoilers, an experiment was carried out in November 2021 at CERNs HiRadMat Facility with scaled prototypes of the proposed spoiler design. By using special beam optics to mimic the...
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Guillermo Peon (CERN)02/06/2022, 12:00
The eight point configuration of the FCC together with the more precise definition of the RF areas are relevant input which modifies important factors of the cooling and ventilation baseline design. This presentation will describe the main challenges and present the current CV baseline parameters. It will also analyse the cooling infrastructure modification needed to pass from FCC-ee to FCC-hh...
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Stanislas Grabon (Centre National de la Recherche Scientifique (FR))02/06/2022, 12:00
This presentation is about the modelling process for vibrations estimations used at LAPP (Annecy's particle physics laboratory) for the FCC project. The main goal of this work is to be able to predict the magnets displacements knowing only the ground displacements. The presentation explains the connection between mechanical calculations and optics studies. It also describes the different steps...
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Federico Carra (CERN)02/06/2022, 12:05
The construction of a mock-up of an arc half-cell of the FCC e+e- collider and booster is proposed, with the goal investigate the aspects related to integration, assembly, transport and maintenance of its components. As a first step, in the next months, it is necessary to develop an optimum overall integration solution for the arc, taking into account all the abovementioned constraints on top...
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Leonard Watrelot (CNAM - Conservatoire National des Arts et Métiers (FR))02/06/2022, 12:15Oral presention (by invitation only)
The precise alignment and monitoring of the FCC-ee MDI is mandatory in order to reach the designed luminosity. Though, the extremely elegant but also complex MDI design raises some tough challenges.
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This presentation will underline the different challenges and explain why they represent difficulties for the design of an alignment and monitoring system. Subjects such as design, technology,... -
m Koratzinos (Massachusetts Inst. of Technology (US))02/06/2022, 14:00Oral presention (by invitation only)
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Cristiana Colloca (CERN)02/06/2022, 14:00Oral presention (by invitation only)
Logistic of equipment and personnel is a major aspect during the assembly, installation but also operation of the future FCC. The transport and handling tools and means need to be studied in details, in an early phase, in order to control the associated costs as well as the duration of interventions.
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The presentation will give an overview on the requirements for the special vehicles... -
Dr Michael Schmidt (Fraunhofer Institute for Material Flow and Logistics)02/06/2022, 14:20Oral presention (by invitation only)
Fraunhofer-IML has analyzed several logistics and handling aspects during the FCC Conceptual Design phase. As part of the feasibility study phase, the key accelerator parameters are being redefined and the existing basic concepts for logistics and material handling vehicles will thus be reviewed and developed in more detail. Within this phase, the studies will focus on three main areas of...
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John Seeman02/06/2022, 14:20Oral presention (by invitation only)
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Andrea Ciarma (CERN)02/06/2022, 14:35
A status update on the beam induced backgrounds studies in the FCC-ee MDI region is presented. Currently under study are the optimisation of the Synchrotron Radiation (SR) shieldings, and background in the detector caused by Incoherent Pair Production (ICP) and beam particles lost during tracking. The turnkey software Key4HEP is being used to track the background particles in the CLD detector...
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Thomas Otto (CERN)02/06/2022, 14:45
The Future Circular Collider is an accelerator research facility with unprecedented dimensions, located in a tunnel with 91 km circumference in a depth of around 200 metres underground. Safety hazards such as ionising radiation, fire, cryogenic gas releases, and oxygen deficiency paired with complicated emergency access and evacuation require solutions for risk mitigation already embedded in...
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Kevin Daniel Joel Andre (CERN)02/06/2022, 14:55
The interaction region for the Future Circular Collider FCC-ee at 182.5 GeV is a sensitive section of the accelerator. The synchrotron radiation produced in the surrounding environmnent of the detector can result in background or damages to the hardware. The studies will present the deposited synchrotron radiation power from the magnetic elements included in the interaction region as well as...
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Marco Calviani (CERN)02/06/2022, 15:10Oral presention (by invitation only)
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Oriol Rios (CERN)02/06/2022, 15:10
The FCC underground infrastructure presents important challenges in terms of human intervention and evacuation in case of an emergency. Both, time and distances required to get to or evacuate areas far from access shafts are large. Employing robots can mitigate the risk linked to this infrastructure.
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Thus, usage of robots are an inherent part of the global FCC safety concept. Their main... -
Jérôme Bucalossi (CEA IRFM (institute of research on fusion using magnetic confinement)), Jérôme Bucalossi02/06/2022, 16:00Oral presention (by invitation only)
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Berrie Giebels (CNRS IN2P3)02/06/2022, 16:30Oral presention (by invitation only)
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Patricia Roussel Chomaz02/06/2022, 17:00Oral presention (by invitation only)
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Giovanni Guerrieri (Universita e INFN Trieste (IT))02/06/2022, 17:50
Global fits to electroweak precision data, comparing the measured values of different quantities with the SM predictions, provide important checks of the SM consistency and sensitivity to beyond-the-SM (BSM) effects. The two most sensitive determinations of $\sin^2 \theta_{\rm eff}^{\rm lep}$, from the LEP measurement of $A_{0,b}^{FB}$ and the SLD measurement of $A_\ell$,
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are in... -
32. Strange jet tagging at the FCC-ee using a transformer NN architecture and K short reconstructionEduardo Ploerer (University of Zurich (CH))02/06/2022, 17:51
The successful identification of strange quark jets at the FCC-ee would enable the study of a multitude of largely unexplored processes, including the first ever study of Z->ss production, rare Higgs boson decays and the strange Yukawa coupling, CKM matrix elements via W decays, and BSM physics scenarios such as FCNCs. Due to the challenging nature of distinguishing these medium-mass quarks,...
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Kunal Gautam (Vrije Universiteit Brussel (BE))02/06/2022, 17:53
Numerous studies and measurements planned at the FCC-ee rely on efficient and accurate jet flavour tagging algorithms, which in turn heavily rely on secondary vertex reconstruction as b and c jets contain long-lived hadrons that decay hundreds of microns from the collision point. At the same time, vertex reconstruction is also an important tool to test the performance of different vertex...
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Jacques Lefrancois (IJClab)02/06/2022, 17:54
GRAiNITE Studies
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Presentation of a new type of sampling ECAL calorimeter. It is of the Shaslik type with WLS fibers, but instead of lead and scintillator plates, it uses a mixture of crystal scintillator grains and heavy liquid. According to Geant 4 studies, the finer sampling allows to reach a resolution < 2%/sqrt(E) A sample of ZnWO4 grains obtained by “spontaneous” flux method... -
Claudio Caputo (Universite Catholique de Louvain (UCL) (BE))02/06/2022, 17:55
The Higgs boson trilinear and quartic self-couplings are directly related to the shape of the Higgs potential; measuring them with precision is extremely important, as they provide invaluable information on the electroweak symmetry breaking and the electroweak phase transition.
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\In this paper, we perform a detailed analysis of double Higgs boson production, through the gluon-gluon fusion... -
Armin Ilg (University of Zurich)02/06/2022, 17:56
A plethora of measurements at the FCC-ee crucially depend on efficient flavour tagging and precise flight distance measurements. To achieve this, the innermost piece of the FCC-ee detectors, the vertex detector, has to precisely locate the collision vertices, while adding only a minimal amount of material to the detector.
The proposed reduction of the beam pipe radius at the FCC-ee from...
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Prof. Stanislaw Jadach02/06/2022, 17:57
KKMCee version 5.0 Monte Carlo event generator is for lepton and quark pair production for the high energy electron-positron annihilation process. It is the most sophisticated event generator for such processes. Its entire source code is now re-written in the modern C++ language (to be included in the FCCee software soon). It reproduces all features of the older KKMC code in Fortran 77....
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Dr Francesco Giovanni Celiberto (ECT*/FBK Trento & INFN-TIFPA)02/06/2022, 17:58
Recent analyses on high-energy inclusive Higgs-boson rates in proton collisions via the gluon fusion channel, matched with the state of-the-art fixed-order N$^3$LO accuracy, have shown that the impact of high-energy resummation corrections reaches 10\% at the FCC nominal energies. This supports the statement that electroweak physics at 100 TeV is expected to receive relevant contributions from...
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Ms Yoxara Sánchez Villamizar (IIP & DFTE - Federal University of Rio Grande do Norte (UFRN))02/06/2022, 17:59
In this work, we derive lower mass bounds on the $Z^\prime$ gauge boson based on the dilepton data from LHC with 13 TeV of center-of-mass energy, and forecast the sensitivity of the High-Luminosity-LHC with $L=3000 fb^{-1}$, the High-Energy LHC with $\sqrt{s}=27$~TeV, and also at the Future Circular Collider with $\sqrt{s}=100$~TeV. We take into account the presence of exotic and invisible...
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Prof. Maciej Chorowski (Wroclaw University of Science and Technology)02/06/2022, 18:00
The cool-down and cryostating of the FCC superconducting magnets requires transport and distribution of large quantities of cryogens over distance up to 10 km. It significantly exceeds the experience gained from the existing Big Science helium cryogenic systems. To limit the pressure drop and the distribution header diameters, cryogens could be distributed at high pressure up to 50 bar. Such...
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Micha Reißig02/06/2022, 18:02
The Karlsruhe Research Accelerator (KARA) at KIT was the first synchrotron to successfully implement near-field electro-optical (EO) beam diagnostics to conduct turn-by-turn bunch profile measurements. In the scope of the FCC Innovation Study (FCCIS), this beam diagnostics concept is under investigation as a tool for the future electron-positron collider FCC-ee to measure center-of-charge and...
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Mattia Soldani (Università degli Studi dell'Insubria & INFN Milano Bicocca)02/06/2022, 18:04
The design of future lepton colliders, which would push the beam intensity frontier significatively forward with respect to the current state of the art, paves the way to novel technological challenges. In particular, the need for very high positron yield in the linear (ILC and CLIC) or circular (FCC-ee, CEPC) colliders requires that innovative approaches to the positron production are...
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Nikki Tagdulang, Patrick Krkotic02/06/2022, 18:06
High temperature superconductors-coated conductors (HTS-CC) with its significantly low surface impedance at low temperature (below superconducting critical temperature Tc) are being considered a good alternative to Cu as coatings for the beam screen of the hadron-hadron future circular collider (FCC-hh). In particular, rare-earth barium cuprates (REBCO-CC) are excellent candidates considering...
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Jacqueline Keintzel (CERN)02/06/2022, 18:08
Within the framework of the Future Circular Collider Feasibility Study, the design of the electron-positron collider FCC-ee is optimised. Polarized low intensity pilot bunches are foreseen at the first energy stages to determine the beam energy, and thus sufficient level of polarization must be achieved which can be limited by alignment and optics errors. Additionally, strong synchrotron...
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Victor Caudan02/06/2022, 18:10
The ability to know the beam energy extremely precisely is a fundamental asset for any storage ring lepton collider such as the FCC-ee. Since the energy is fundamentally related to the spin tune, measuring the spin precession frequency determines the energy; the method requires that the beams be polarized. We present here first simulations for a simplified lepton storage ring with 100 m...
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Oleksandr HRYHORENKO (CNRS/IN2P3/IJCLab), Bouchra Ourahmoune (CNRS/IN2P3/IJCLab)02/06/2022, 18:12
Over the years, it has been observed for cavities in operation in accelerators, a continuous degradation of their performance with the appearance or reinforcement of the parasitic field emission phenomenon. This phenomenon, caused by surface pollution promoting the emission and acceleration of electrons by electromagnetic fields, causes the generation of ionizing X radiations. This poses...
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Guillaume Simon (Université Paris-Saclay (FR))02/06/2022, 18:14
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Nikos Nikolopoulos (Université Paris-Saclay (FR))02/06/2022, 18:16
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Angeles Faus-Golfe (IJClab IN2P3 CNRS-Université Paris-Saclay (FR))02/06/2022, 18:18
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Oleksandr HRYHORENKO02/06/2022, 18:20
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Fahad ALHARTHI02/06/2022, 18:22
The escalating interest of the future lepton colliders with high luminosity, draws the attention to the crucial role of the positron sources. One of these colliders is the FCC-ee. Two main positron production schemes (Conventional and Hybrid) are considered for the FCC-ee, will be discussed briefly here. The work is in progress for the development of positron generation and tracking model...
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Guy Wormser (LAL Orsay)02/06/2022, 19:00Oral presention (by invitation only)
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Ursula Bassler02/06/2022, 19:05Oral presention (by invitation only)
La physique des particules explore l’infiniment petit et permet d’élucider l’évolution de l’Univers depuis ses origines. Bien que la compréhension actuelle, résumé « dans le modèle standard », donne une description avec une précision époustouflante des phénomènes observés, des questions restent ouvertes : le rôle du boson de Higgs, l’asymétrie matière antimatière, la compréhension de la...
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Didier Claude Contardo (Centre National de la Recherche Scientifique (FR))02/06/2022, 19:30Oral presention (by invitation only)
capables de résister à des taux d’irradiation sans précédant. Elles devront aussi traiter des flux de données gigantesques, dont il faudra maîtriser la complexité pour extraire des signaux de physique bien dissimulés ou extrêmement rares.
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Nous évoquerons les nouveaux paradigmes proposés pour atteindre ces objectifs. Quelques exemples de développements techniques nécessaires, depuis la... -
Pierre Vedrine (Université Paris-Saclay (FR))02/06/2022, 19:55Oral presention (by invitation only)
Le futur collisionneur circulaire (FCC) est conçu pour être la prochaine génération de collisionneur de particules à haute performance, qui prendra le relais du LHC, lorsque la phase de haute luminosité (HL-LHC) de cette machine arrivera à son terme, vers 2040.
La mission du FCC sera de repousser les frontières d'énergie et d'intensité des collisionneurs de particules, dans le but...
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Jacqueline Keintzel (CERN)03/06/2022, 09:00Oral presention (by invitation only)
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Barbara Humann (Vienna University of Technology (AT))03/06/2022, 09:55Oral presention (by invitation only)
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Frank Gerigk (CERN)03/06/2022, 10:20Oral presention (by invitation only)
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Klaus Hanke (CERN)03/06/2022, 10:35Oral presention (by invitation only)
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Timothy Paul Watson (CERN)03/06/2022, 11:25Oral presention (by invitation only)
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Patrick Janot (CERN)03/06/2022, 11:45Oral presention (by invitation only)
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Frank Zimmermann (CERN)03/06/2022, 12:15Oral presention (by invitation only)
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Georg Gassner (SLAC National Accelerator Laboratory)Oral presention (by invitation only)
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Dr Joffre Gutierrez Royo (ICMAB - CSIC)
Since the late 1960s, superconductors are employed as materials for radio-frequency (RF) cavities because of its operation at higher acceleration voltage gradient and lower AC power demand than comparable normal conducting alternatives. In this field, elemental Nb is the most widely used material owing to its highest critical temperature Tc and highest RF critical field Hsh among the elemental...
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Marco Garlasche (CERN)Oral presention (by invitation only)
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Dr Auguste Guillaume Besson (Centre National de la Recherche Scientifique (FR))
The physics programme of FCCee requires a particularly high performance vertex detector, where spatial resolution and material budget prevail over radiation tolerance and read-out speed. As of today, CMOS pixel sensors provide promising
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perspectives of detection performances matching this requirement ranking. Two CMOS technologies are currently developed for this purpose. Their potential will...
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