CERN Accelerating science

Accelerator Physics

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2019-04-19
09:36
Accurate and Efficient Tracking in Electromagnetic Quadrupoles / Pugnat, Thomas (IRFU, Saclay) ; Bonaventura, Luca (Milan, Polytech.) ; Dalena, Barbara (IRFU, Saclay) ; De Maria, Riccardo (CERN) ; Molson, James (CERN) ; Simona, Abele (Milan, Polytech.)
Accelerator physics needs advanced modeling and simulation techniques, in particular for beam stability studies. A deeper understanding of the effects of magnetic fields nonlinearities will greatly help in the improvement of future colliders design and performance. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAK004 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK004

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2019-04-19
09:36
Updated Model of the Resistive Wall Impedance for the Main Ring of J-PARC / Yee-Rendón, Bruce (KEK, Tsukuba) ; Chin, Yong Ho (KEK, Tsukuba) ; Kuboki, Hironori (KEK, Tsukuba) ; Schenk, Michael (CERN) ; Toyama, Takeshi (KEK, Tsukuba)
The resistive wall impedance is one of the major contributors of the impedance in the Main Ring of J-PARC. The present model assumes round chambers of stainless steel with perfect magnet boundary conditions for its surroundings. [...]
2018 - 3 p. - Published in : (2018) , pp. THPAK002
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 6, pp. 062009 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK002

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2019-04-19
09:36
A Benchmark Study of a High Order Symplectic Integration Method With Only Positive Steps / Skoufaris, Kyriacos (CERN ; Crete U.) ; Laskar, Jacques (Paris Observ.) ; Papaphilippou, Yannis (CERN) ; Skokos, Charalampos (Cape Town U.)
The symplectic integrators CSABA & CSBAB are used in order to calculate single particles dynamics in accelerators and storage rings. These integrators include only forward drift steps while being highly accurate. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAF060 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF060

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2019-04-19
09:36
Performance Optimisation of Turn-by-Turn Beam Position Monitor Data Harmonic Analysis / Malina, Lukas (CERN ; U. Oslo (main)) ; Coello de Portugal, Jaime Maria (CERN) ; Dilly, Joschua (CERN) ; Skowroński, Piotr (CERN) ; Tomás, Rogelio (CERN) ; Toplis, Matthew (CERN)
Nowadays, turn-by-turn beam position monitor data is increasingly utilized in many accelerators, as it allows for fast and simultaneous measurement of various optics parameters. The accurate harmonic analysis of turn-by-turn data costs beam time when needed online. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAF045 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF045

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2019-04-17
07:03
Single Bunch Instabilities in FCC-ee / Belli, Eleonora (CERN) ; Castorina, Giovanni (INFN, Rome) ; Migliorati, Mauro (INFN, Rome) ; Rumolo, Giovanni (CERN) ; Spataro, Bruno (Frascati) ; Zobov, Mikhail (Frascati)
FCC-ee is a high luminosity lepton collider with a centre-of-mass energy from 91 to 365 GeV. Due to the machine parameters and pipe dimensions, collective effects due to electromagnetic fields produced by the interaction of the beam with the vacuum chamber can be one of the main limitations to the machine performance. [...]
IPAC-2018-THPAK052.- 2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAK052 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.3336-3339

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2019-04-17
07:03
Studies of Longitudinal Dynamics in the Micro-Bunching Instability Using Machine Learning / Boltz, Tobias (KIT, Karlsruhe) ; Brosi, Miriam (KIT, Karlsruhe) ; Bründermann, Erik (KIT, Karlsruhe) ; Müller, Anke-Susanne (KIT, Karlsruhe) ; Schwarz, Markus (CERN) ; Schönfeldt, Patrik (KIT, Karlsruhe) ; Yan, Minjie (KIT, Karlsruhe)
The operation of synchrotron light sources with short electron bunches increases the emitted CSR power in the THz frequency range. However, the spatial compression leads to complex longitudinal dynamics, causing the formation of micro-structures in the longitudinal bunch profiles. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-THPAK030 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK030

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2019-04-16
09:15
Design of the New Proton Synchrotron Booster Absorber Scraper (PSBAS) in the Framework of the Large Hadron Collider Injection Upgrade (LIU) Project / Teofili, Lorenzo (U. Rome La Sapienza (main) ; CERN ; INFN, Rome) ; Briz Monago, Jose (CERN) ; Calviani, Marco (CERN) ; Chritin, Nicolas (CERN) ; Esala, Jaakko (CERN) ; Gilardoni, Simone (CERN) ; Lamas Garcia, Inigo (CERN) ; Maestre, Jorge (CERN) ; Migliorati, Mauro (U. Rome La Sapienza (main) ; CERN ; INFN, Rome) ; Polzin, Tobias (CERN) et al.
The Large Hadron Collider (LHC) Injector Upgrade (LIU) Project at CERN calls for increasing beam intensity for the LHC accelerator chain. Some machine components will not survive the new beam characteristics and need to be rebuilt for the new challenging scenario. [...]
2018 - 4 p. - Published in : (2018) , pp. THPAK091
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 8, pp. 082027 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK091

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2019-04-13
06:00
Assessment of Linear and Non-Linear Optics Errors due to Beam-Beam with Multipoles for the High Luminosity LHC / Medina Medrano, Luis (Guanajuato U. ; CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN)
Study of the head-on and long-range beam-beam effects in the High Luminosity LHC (HL-LHC) is of interest to evaluate their potential impact on performance (in the form of luminosity imbalance) and machine operation (collimator system), and, depending on their magnitude, correction schemes might be necessary to minimize them. In this work, both the β-beating at zero amplitude and its amplitude-dependence are computed for the current HL-LHC baseline optics and parameters, as well as the amplitude detuning, at the main interaction points and collimators. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAK135 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK135

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2019-04-12
06:24
Dosimetry Mapping of Mixed-Field Radiation Environment Through Combined Distributed Optical Fiber Sensing and FLUKA Simulation / Di Francesca, Diego (CERN) ; Infantino, Angelo (CERN) ; Li Vecchi, Gaetano (CERN ; Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Girard, Sylvain (Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Alessi, Antonino (Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Kadi, Yacine (CERN) ; Brugger, Markus (CERN)
Distributed optical fiber (OF) radiation sensing is a technique recently adopted at CERN for the monitoring of radiation dose levels in the proton synchrotron (PS) booster and in the PS. In this paper, we present the progress made on our previous work by benchmarking the rich information contained in the spatially distributed OF dose measurement with the radiation levels simulated with the FLUKA Monte Carlo code. [...]
2018 - 7 p. - Published in : IEEE Trans. Nucl. Sci. 66 (2019) 299-305

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2019-04-10
08:58
Beam Optics Simulations and Thermal Shielding for the AEGIS Antihydrogen Experiment / Lehner, Sebastian
The AEGIS (Antimatter Experiments: Gravity, Interferometry, Spectroscopy) experi-ment at CERN’s Antiproton Decelerator aims at a direct measurement of the gravita-tional interaction of antihydrogen [...]
CERN-THESIS-2014-465 -

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