CERN Accelerating science

All CERN Accelerators documents

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2018-11-17
06:40
High-Energy LHC Design / Zimmermann, Frank (CERN) ; Abelleira, Jose Luis (JAI, UK) ; Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Apyan, Armen (Yerevan Phys. Inst.) ; Arsenyev, Sergey (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Benedikt, Michael (CERN) ; Bruce, Roderik (CERN) ; Burkart, Florian (DESY) et al.
In the frame of the FCC study we are designing a 27 TeV hadron collider in the LHC tunnel, called the High Energy LHC (HE-LHC)..
2018 - 8 p. - Published in : (2018) , pp. MOPMF064
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 2, pp. 022009 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF064

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2018-11-17
06:40
Broadband Impedance of Pumping Holes and Interconnects in the FCC-hh Beamscreen / Arsenyev, Sergey (CERN) ; Schulte, Daniel (CERN)
In the proposed Future Circular Collider (FCC-hh) pumping holes and interconnects between sections of the beamscreen can be sources of unwanted broadband impedance, potentially leading to the transverse mode coupling instability (TMCI). The pumping holes pose a greater challenge to the impedance calculation due to their small contribution per hole. [...]
2018 - 5 p. - Published in : (2018) , pp. MOPMF030
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 2, pp. 022003 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF030

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2018-11-17
06:40
FCC-hh transverse impedance budget / Arsenyev, Sergey (CERN) ; Boine-Frankenheim, Oliver (Darmstadt, Tech. U. ; Darmstadt, GSI) ; Schulte, Daniel (CERN)
Contributions of different machine elements of the proposed Future Circular Collider (FCC-hh) impedance budget are calculated based on beam stability considerations. For each element (the beamscreen, the collimators, etc), effective impedances are calculated at the injection energy and at the collision energy for considered instabilities. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF029 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF029

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2018-11-17
06:40
Landau Damping Studies for the FCC: Octupole Magnets, Electron Lens and Beam-Beam Effects / Tambasco, Claudia (Ecole Polytechnique, Lausanne) ; Arsenyev, Sergey (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Rivkin, Leonid (Ecole Polytechnique, Lausanne) ; Schulte, Daniel (CERN)
Stability studies for the FCC-hh operational cycle are explored using Landau octupoles and electron lenses alone and in the presence of long-range as well as head-on beam-beam effects. Pros and cons of the various methods are compared and an optimum operational scenario to guarantee the maximum stability is proposed..
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAF074 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF074

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2018-11-17
06:40
Beam Dump Facility Target: Design Status and Beam Tests in 2018 / Lopez Sola, Edmundo (CERN) ; Aberle, Oliver (CERN) ; Avigni, Pietro (CERN) ; Bianchi, Laura (CERN) ; Busom, Josep (CERN) ; Calviani, Marco (CERN) ; Casolino, Mirkoantonio (CERN) ; Espadanal, Joao (CERN) ; Fraser, Matthew (CERN) ; Girod, Sylvain (CERN) et al.
The Beam Dump Facility (BDF) Project, currently in its design phase, is a proposed general-purpose fixed target facility at CERN, dedicated to the Search for Hidden Particles (SHiP) experiment in its initial phase. At the core of the installation resides the target/dump assembly, whose aim is to fully absorb the high intensity 400 GeV/c SPS beam and produce charmed mesons. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMG002 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG002

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2018-11-17
06:40
Lifetime and Beam Losses Studies of Partially Strip Ions in the SPS ($^{129}$Xe$^{39+}$) / Hirlaender, Simon (CERN) ; Alemany-Fernández, Reyes (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Bohl, Thomas (CERN) ; Cettour Cave, Stephane (CERN) ; Cornellis, Karel (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Krasny, Mieczyslaw (Paris U., VI-VII ; Paris, IN2P3 ; CERN) et al.
The CERN multipurpose Gamma Factory proposal relies on using Partially Stripped Ion (PSI) beams, instead of electron beams, as the drivers of its light source. If such beams could be successfully stored in the LHC ring, fluxes of the order of $10^{17}$ photons/s, in the $\gamma$-ray energy domain of $1 \leq \rm{E}_{\gamma} \leq 400$ MeV could be achieved. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-THPMF015 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPMF015

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2018-11-17
04:03
Synchrotron radiation interaction with cryosorbed layers for astrochemical investigations / Dupuy, R. (LERMA, Ivry) ; Bertin, M. (LERMA, Ivry) ; Féraud, G. (LERMA, Ivry) ; Michaut, X. (LERMA, Ivry) ; Putaud, T. (LERMA, Ivry) ; Philippe, L. (LERMA, Ivry) ; Jeseck, P. (LERMA, Ivry) ; Cimino, R. (Frascati ; Frascati) ; Baglin, V. (CERN) ; Romanzin, C. (LCP, Orsay) et al.
Photon-stimulated desorption (PSD) is a process of interest for the two seemingly unrelated topics of accelerator vacuum dynamics and astrochemistry. [...]
arXiv:1810.10392.
- 6 p.

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2018-11-16
15:29
Construction of TT10-SPS Injection Region Model and Following Aperture Studies / Mahon, Aveen (McGill University, (CA)) ; Fraser, Matthew Alexander (CERN) ; Velotti, Francesco Maria (CERN)
The main objective of this project was to model the injection region going from the transfer line TT10 into the SPS. [...]
CERN-ACC-NOTE-2018-0074.
- 2018. - 21 p.
Full text

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2018-11-16
14:11
Radiation levels in the LHC during the 2015 Pb-Pb and 2016 p-Pb run and mitigation strategy for the electronic systems during HL-LHC operation / Martinella, Corinna (University of Jyvaskyla (FI)) ; Bahamonde Castro, Cristina (Ministere des affaires etrangeres et europeennes (FR)) ; Lechner, Anton (CERN) ; Danzeca, Salvatore (CERN) ; Kadi, Yacine (CERN) ; Brugger, Markus (CERN) ; Garcia Alia, Ruben (CERN)
During the Pb-Pb and p-Pb operations of LHC, high localized beam losses can induce a risk of failure for the electronic systems installed in the tunnel. [...]
CERN-ACC-NOTE-2018-0073.
- 2018. - 13 p.

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2018-11-16
13:21
LHC Availability 2018: Technical Stop 2 to Technical Stop 3 / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period of Technical Stop 2 (TS2) to the end of standard proton physics in 2018. [...]
CERN-ACC-NOTE-2018-0072.
- 2018. - 16 p.
Full text

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