| Paper |
Title |
Page |
| MOPMP002 |
Linac and Damping Ring Designs for the FCC-ee |
420 |
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- S. Ogur, K. Oide, Y. Papaphilippou, L. Rinolfi, F. Zimmermann
CERN, Geneva, Switzerland
- A.M. Barnyakov, A.E. Levichev, P.V. Martyshkin, D.A. Nikiforov
BINP SB RAS, Novosibirsk, Russia
- I. Chaikovska, R. Chehab
LAL, Orsay, France
- K. Furukawa, N. Iida, T. Kamitani, F. Miyahara, K. Oide
KEK, Ibaraki, Japan
- E.V. Ozcan
Bogazici University, Bebek / Istanbul, Turkey
- S.M. Polozov
MEPhI, Moscow, Russia
- L. Rinolfi
ESI, Archamps, France
- F. Yaman
IZTECH, Izmir, Turkey
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We report the design of the pre-injector chain for the Future Circular e+ e− Collider (FCC-ee) system. The electron beam from a low-emittance RF gun is accelerated by an S-band linac up to 6 GeV. A damping ring at 1.54 GeV is required for emittance cooling of the positron beam. The intermediate energy step from the exit of the S-band linac at 6 GeV to the 20 GeV injection energy of the top-up booster can be provided by the modified Super Proton Synchrotron (SPS), serving as a pre-booster ring (PBR). An alternative option to reach 20 GeV energy would be to extend the S-band linac with a C- or X-band linac. An overall cost optimisation will determine the choice of the final configuration. Beam loss and emittance dilution in the linac due to space charge effects, wakefields, and misalignment of accelerator components can be mitigated by RF phasing and orbit steering. Start-to-end simulations examine the beam transport through the linac up to either 6 GeV or 20 GeV. The results indicate large design margins. Simulations of the beam dynamics in the damping ring (DR) demonstrate a sufficiently large momentum acceptance. Effects of intrabeam scattering and electron cloud instability in the DR are also studied.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-MOPMP002
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| About • |
paper received ※ 13 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019 |
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| WEYYPLM3 |
First Results of the Compensation of the Beam-Beam Effect with DC Wires in the LHC |
2262 |
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- G. Sterbini, D. Amorim, H. Bartosik, A. Bertarelli, R. Bruce, X. Buffat, F. Carra, L.R. Carver, G. Cattenoz, E. Effinger, S.D. Fartoukh, N. Fuster-Martínez, M. Gąsior, M. Gonzalez-Berges, A.A. Gorzawski, G.H. Hemelsoet, M. Hostettler, G. Iadarola, O.R. Jones, N. Karastathis, S. Kostoglou, I. Lamas Garcia, T.E. Levens, L.E. Medina Medrano, D. Mirarchi, J. Olexa, S. Papadopoulou, Y. Papaphilippou, D. Pellegrini, M. Pojer, L. Ponce, A. Poyet, S. Redaelli, A. Rossi, B. Salvachua, H. Schmickler, F. Schmidt, K. Skoufaris, M. Solfaroli, R. Tomás, G. Trad, D. Valuch, C. Xu, C. Zamantzas, P. Zisopoulos
CERN, Geneva, Switzerland
- D. Amorim
Grenoble-INP Phelma, Grenoble, France
- M. Fitterer, A. Valishev
Fermilab, Batavia, Illinois, USA
- D. Kaltchev
TRIUMF, Vancouver, Canada
- S. Kostoglou
National Technical University of Athens, Zografou, Greece
- A.E. Levichev
BINP SB RAS, Novosibirsk, Russia
- A. Poyet
Université Grenoble Alpes, Grenoble, France
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The compensation of the long-range beam-beam interactions using DC wires is presently under study as an option for enhancing the machine performance in the frame of the High-Luminosity LHC project (HL-LHC). The original idea dates back more than 15 years. After the installation of four wire prototypes in the LHC in 2018, a successful experimental campaign was performed during the last months. The experimental setup and the main results are reported in this paper.
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Slides WEYYPLM3 [6.371 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEYYPLM3
|
|
| About • |
paper received ※ 06 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
|
| Export • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
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