CERN Accelerating science

Accelerator Physics

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2018-12-07
10:50
Dynamic aperture studies for HL-LHC V1.0 / Cai, Yunhai ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Nosochkov, Yuri (SLAC National Accelerator Laboratory (US)) ; Van Der Veken, Frederik (University of Malta (MT))
Intense efforts have been devoted to the detailed study of the dynamic aperture of the HL-LHC V1.0 optics and layout version, without beam-beam effects, for several configurations, differing by optical properties or properties of the field quality of the new magnets for HL-LHC [...]
CERN-ACC-2018-0054.
- 2018. - 42 p.

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2018-12-05
06:11
Identification and Removal of SPS Aperture Limitations / Kain, Verena (CERN) ; Alemany-Fernández, Reyes (CERN) ; Bartosik, Hannes (CERN) ; Cettour Cave, Stephane (CERN) ; Cornelis, Karel (CERN) ; Cruikshank, Paul (CERN) ; Ferreira Somoza, Jose (CERN) ; Goddard, Brennan (CERN) ; Pasquino, Chiara (CERN)
The CERN SPS (Super Proton Synchrotron) serves as LHC injector and provides beam for the North Area fixed target experiments. Since the 2016 run automated local aperture scans have been performed with the main focus on the vertical plane where limitations typically arise due to the flat vacuum chambers in most SPS elements. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF021 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF021

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2018-12-05
06:10
Upgrade of the CERN SPS Beam Position Measurement System / Wendt, Manfred (CERN) ; Barros Marin, Manoel (CERN) ; Boccardi, Andrea (CERN) ; Bogey, Thierry (CERN) ; Degl'Innocenti, Irene (CERN) ; Kain, Verena (CERN) ; Moran Guizan, Carla (CERN) ; Topaloudis, Athanasios (CERN)
The CERN Super Proton Synchrotron (SPS) is a fast cycling hadron accelerator delivering protons with momenta of up to 450 GeV/c for the Large Hadron Collider (LHC), fixed target experiments and other users such as the AWAKE plasma acceleration experiment, and also used to accelerate heavy ions. This paper presents the upgrade initiative for the SPS beam position measurement system in the frame of the CERN LHC Injector Upgrade (LIU) project. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPAF085 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAF085

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2018-12-05
04:14
Effect of Crab cavity HOMs on the coupled-bunch stability of HL-LHC / Antipov, Sergey (CERN) ; Biancacci, Nicolo (CERN) ; Komppula, Jani (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Burov, A. (Fermilab)
High frequency High Order Modes can significantly affect the coupled-bunch stability in a circular accelerator. [...]
arXiv:1812.00659.
- 10 p.
Fulltext

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2018-12-04
06:43
Status of the FCC-ee Top-Up Booster Synchrotron / Härer, Bastian (CERN) ; Holzer, Bernhard (CERN) ; Papaphilippou, Yannis (CERN) ; Tydecks, Tobias (CERN)
This contribution presents the status of the top-up booster synchrotron for the FCC electron-positron collider FCC-ee, which is a 100 km electron-positron collider being designed for precision studies and rare decay observations in the range of 90 to 365 GeV centre-of-mass energy. In order to keep the luminosity at a level of the order of 10³⁵ cm⁻²s⁻¹ continuous top-up injection is required, because of the short beam lifetime of less than one hour. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF059 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF059

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2018-12-04
06:43
FCC-ee Dynamic Aperture Studies and Frequency Map Analysis / Tydecks, Tobias (CERN) ; Aumon, Sandra (CERN) ; Charles, Tessa (CERN) ; Härer, Bastian (CERN) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (CERN) ; Papaphilippou, Yannis (CERN) ; Wenninger, Jorg (CERN)
The FCC-ee Lepton Collider will provide e⁺e⁻ collisions in the beam energy range of 45.6 GeV to 182.5 GeV. FCC-ee will be a precision measurement tool for Z, W, H and t physics with expected luminosities of 2.07× 10³⁶ cm⁻² s⁻¹ at the Z-pole and 1.3 × 10³⁴ cm⁻² s⁻¹ at the tt⁻ threshold. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF057 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF057

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2018-12-04
06:43
Comparison of Different Transverse Emittance Measurement Techniques in the Proton Synchrotron Booster / Di Giovanni, Gian Piero (CERN) ; Albright, Simon (CERN) ; Forte, Vincenzo (CERN) ; Fraser, Matthew (CERN) ; Guidoboni, Greta (EBG MedAustron GmbH) ; Mikulec, Bettina (CERN) ; Roncarolo, Federico (CERN) ; Santamaría García, Andrea (CERN)
The measurement of the transverse emittance in an accelerator is a crucial parameter to evaluate the performance of the machine and to understand beam dynamics processes. In recent years, controlling and understanding the emittance became particularly relevant in the Proton Synchrotron Booster (PSB) at CERN as part of the LHC Injectors Upgrade (LIU). [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF054
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF054

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2018-12-04
06:43
Beam Dynamics Simulations for Operating a Robinson Wiggler at the MLS / Li, Ji (Helmholtz-Zentrum, Berlin) ; Feikes, Joerg (Helmholtz-Zentrum, Berlin) ; Ries, Markus (Helmholtz-Zentrum, Berlin) ; Tydecks, Tobias (CERN)
A Robinson wiggler is planned to be installed in the storage ring of the Metrology Light Source (the MLS). The Robison wiggler (RW) is a device consisting of a chain of combined-function magnets (CFMs), intended to manipulate the damping partition numbers and thus adjust the longitudinal emittance. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAF086 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF086

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2018-11-28
07:11
Examination of RF Signal Processing for Cavity BPMs / Nadenau, Johannes
Accelerators for charged particles, e.g [...]
CERN-THESIS-2018-266 - 93 p.

Fulltext
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2018-11-23
11:19
Refining the HL-LHC Operational Settings with Inputs From Dynamic Aperture Simulations: A Progress Report / Karastathis, Nikolaos (CERN) ; De Maria, Riccardo (CERN) ; Fartoukh, Stephane (CERN) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN)
Recent Dynamic Aperture (DA) simulations aimed at providing guidance for the latest updates of the operational scenario for the High Luminosity upgrade of the LHC. The impact of the increased chromaticity and octupole current has been assessed considering the latest updates of the optics. [...]
2018 - 6 p. - Published in : (2018) , pp. MOPMF041
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 2, pp. 022005 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF041

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