FCC Week 2017

Session

FCC-hh machine design

30 May 2017, 08:30

"Pavillon"

Conveners

FCC-hh machine design: Review: design (1)

• Roy Aleksan

FCC-hh machine design: Review: design (2)

• Francesco Cerutti (CERN)

FCC-hh machine design: Review: Beam performance and specifications

• Mauro Migliorati (Sapienza Universita e INFN, Roma I (IT))

FCC-hh machine design: Review: Injectors

• Peter-Jurgen Spiller

FCC-hh machine design: SppC and selected topics

• Angeles Faus-Golfe (Univ. of Valencia and CSIC (ES))

FCC-hh machine design: Selected topics

• Oliver Boine-Frankenheim (TU Darmstadt)

35. Parameters and layout

Daniel Schulte (CERN)

30/05/2017, 08:30

36. Arc design and lattice integration

Dr Antoine Chance (CEA Irfu)

30/05/2017, 08:45

The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the three options considered for the next generation accelerator in high-energy physics as recommended by the European Strategy Group. The layout of FCC-hh has been optimized to a more compact design following recommendations from civil engineering aspects. The updates on the first order and second order optics of the ring will be...

37. Experimental insertions

Andrei Seryi (University of Oxford (GB))

30/05/2017, 09:10

38. Injections and extraction insertions and dump lines

Florian Burkart (CERN)

30/05/2017, 09:35

Safely extracting and absorbing the 50 TeV proton beams of the FCC-hh collider will be a major challenge. In the new baseline concept one straight section of 2.8 km length is dedicated to the beam dumping system. The beam dumping system will fast-extract the beam and transport it to an external absorber. The high stored beam energy of about 8.5 GJ per beam means that machine protection...

39. Betatron collimation system insertions

Andy Sven Langner (CERN)

30/05/2017, 10:30

40. Energy collimation system insertions

Dr Angeles Faus-Golfe (Univ. of Valencia and CSIC (ES))

30/05/2017, 10:52

41. Longitudinal dynamics and RF requirements

Elena Shaposhnikova (CERN)

30/05/2017, 11:14

42. Ion considerations

Michaela Schaumann (CERN)

30/05/2017, 11:36

The hadron collider studied in the future circular collider (FCC) project could operate with protons and lead nuclei in similar modes to the LHC. Considering the current baseline assumptions for the proton-proton program, this paper updates and extends previous studies investigating the potential performance in lead-lead and proton-lead collisions. Beam parameter and luminosity evolution, as...

43. Dynamic aperture and alignment

Barbara Dalena (CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))

30/05/2017, 13:30

In the hadron machine option, proposed in the context of the Future Circular Colliders (FCC) study, the first evaluation of dipole field quality, based on the Nb3Sn technology has shown a Dynamic Aperture at injection above the LHC target value. In this paper the effect of field imperfections on the dynamic aperture, using the updated lattice design, is presented. Tolerances on the main...

44. Impedances and electron cloud

Oliver Boine-Frankenheim (TU Darmstadt)

30/05/2017, 13:55

This presentation summarizes the recent activities on beam instabilities, impedances and electron clouds within the EuroCirCol Workpackage 2.4.

45. Beam‐beam effects

Tatiana Pieloni (EPF Lausanne)

30/05/2017, 14:15

46. Instrumentation overview and challenges

Laurette Ponce (CERN)

30/05/2017, 14:35

47. LHC as 3.3 TeV HEB

Wolfgang Bartmann (CERN)

30/05/2017, 15:30

The transfer and injection of the high brightness 3.3 TeV proton beams from the High Energy Booster (HEB) to the FCC presents several interesting challenges. In the new baseline concept one straight section of 1.4 km length is dedicated to house one injection system and a side-experiment. Due to the limited amount of space, a special injection and collision optics were designed and optimized...

48. scSPS as 1.3 TeV HEB

Florian Burkart (CERN)

30/05/2017, 15:55

A new SPS with significantly higher extraction energy than the present 450 GeV is of interest for several CERN projects presently under study. Firstly, for the Future Circular Collider for hadrons (FCC-hh) the tunnels of SPS, LHC and the 100 km collider will be available to house a High Energy Booster (HEB). Replacing the SPS by a superconducting single aperture, low complexity accelerator...

49. 3.3 TeV beam injection into combined experimental and injection FCC machine insertions

Michael Hofer (Vienna University of Technology (AT))

30/05/2017, 16:15

The layout of the FCC-hh has recently been modified due to civil engineering requirements. Whereas in the previous baseline layout the low luminosity experiments were situated in dedicated straight sections, the new version combines injection and experiment in the same insertion keeping the straight section length constant. We present first optics designs for these insertions together with the...

50. Impact of injection energy on collider design

Dr Antoine Chance (CEA Irfu)

30/05/2017, 16:35

149. SppC study progress

Jingyu Tang (Institute of High Energy Physics, CAS)

31/05/2017, 08:30

150. SppC collimation study

Jianquan Yang (Institute of High Energy Physics (CN))

31/05/2017, 08:55

In LHC, the limiting locations in terms of losses on cold magnets are the dispersion suppressors downstream of the transverse collimation insertion. These losses are due to the protons experiencing single diffractive interactions in the primary collimators. How to solve this problem is very important for future proton-proton collider, such as FCC and SPPC. An effective method which arranges...

151. Use of electron lenses in FCC-hh

Vladimir Shiltsev (Fermilab)

31/05/2017, 09:15

High intensity and high brightness beams in FCC pose significant challenges due to coherent instabilities and beam collimation. Usual ways to control the instabilities, such as nonlinear octupole magnets, beam feedback dampers, employment of chromatic effects as well as standard types of the "hard-material" collimators become less effective at the ultimate FCC-hh beam paramters. We briefly...

152. Implications of 5 ns bunch spacing for the injector chain

Elena Shaposhnikova (CERN)

31/05/2017, 09:35

153. Correction schemes for the interaction region of FCC-hh

Emilia Cruz Alaniz (University of Oxford JAI)

31/05/2017, 10:30

The interaction region is an important and challenging part of the design of any accelerator. An important aspect of this design is the compensation of the errors in the interaction region, necessary not only to control de orbit deviation but also to ensure the long term stability of the beam. Several errors are expected to be found in the lattice; this study contemplates only errors in the...

154. Exploring the triplet parameter space to optimise the final focus of the FCC

Leon Van Riesen-Haupt

31/05/2017, 10:40

One of the main challenges when designing final focus systems of particle accelerators is maximising the beam stay clear in the strong quadrupole magnets of the inner triplet. Moreover it is desirable to keep the quadrupoles in the inner triplet as short as possible for space and costs reasons but also to reduce chromaticity and simplify corrections schemes. An algorithm that explores the...

155. Cross-talk simulations between FCC-hh experimental interaction regions

Haroon Rafique (University of Manchester/Cockcroft Institute)

31/05/2017, 10:50

Debris from 50 TeV proton-proton collisions at the main interaction point in the FCC-hh may contribute to the background in the subsequent detector. This cross-talk is of possible concern for the FCC-hh due to the high luminosity and energy of the collider. Monte Carlo simulations with FLUKA have been performed using a full length model of the tunnel between the adjacent points A and B, in...

156. Simulation of the FCC-hh double crystal-based collimation system

Alexei Sytov (Universita di Ferrara & INFN (IT))

31/05/2017, 11:00

"The FCC-hh collimation system must be designed to prevent quench of superconducting magnets. However, preliminary simulations [1] demonstrate the estimated cleaning inefficiency to be 2 orders less than required. In order to considerably reduce it, we propose a preliminary setup of a double crystal-based collimation system [2].
The main advantage of the double crystal-based collimation,...

157. Dispersion suppressor protection

Mr Alexander Krainer (CERN)

31/05/2017, 11:10

The superconducting magnets in the Dispersion suppressors at the end of the straight sections are the main location for beam losses in cold magnets in the LHC. For the FCC this poses a problem due to the much higher beam energies. The losses in these regions mainly come from off-momentum particles due to proton-proton collisions in the experimental areas, and single-diffractive effects from...

158. Alignment and beam-based correction

David Jean Henri Boutin (CEA)

31/05/2017, 11:20

The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the three 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. Studies are ongoing about the evaluation of the various magnets mechanical errors and field errors tolerances in the arc sections of FCC-hh, as well as an...

159. Importance of the surface resistivity for the impedance model

Sergey Arsenyev (CERN)

31/05/2017, 11:30

Transverse mode coupling instability (TMCI) can limit the maximum achievable bunch intensity in the FCC-hh. Impedance due to the resistive walls of the beamscreen makes a significant contribution to the TMCI, especially at the injection energy. The proposed laser treatment of the beamscreen surface for e-cloud mitigation might increase the impedance to a level unacceptable from the beam...

160. Landau damping of intra-bunch oscillations

Vladimir Kornilov (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

31/05/2017, 11:40

Octupole magnets are foreseen in the FCC-hh lattice as a passive mitigation of the transverse collective instabilities. The incoherent betatron tune spread due to octupoles provides Landau damping of the unstable bunch modes. The previous studies for FCC, and estimations for LHC, have considered only the rigid bunch modes. The higher-order modes cause intra-bunch oscillations, which are...

161. FCC-hh electron cloud

Lotta Mether (Ecole Polytechnique Federale de Lausanne (CH))

31/05/2017, 11:50