CERN Accelerating science

CERN Published Articles

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2019-04-24
06:12
Analysis and Operational Feedback of the New High-Energy Beam Dump in the CERN SPS / Perillo-Marcone, Antonio (CERN) ; Calviani, Marco (CERN) ; Illan Fiastre, Ricardo (CERN) ; Rios Rodriguez, Paula (CERN) ; Romagnoli, Giulia (CERN)
The CERN Super Proton Synchrotron (SPS) high-energy internal dump (TIDVG) is used to intercept beam dumps from 10².2 to 450 GeV. An inspection in 2013 revealed significant beam induced damage to the aluminium absorbing block, resulting in operational limitations to minimize the risk of reproducing this phenomenon. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMG003 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG003

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2019-04-24
06:12
Engineering Design and Prototyping of the New LIU PS Internal Beam Dumps / Romagnoli, Giulia (CERN) ; Briz Monago, Jose (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Cotte, Denis (CERN) ; Coutron, Yannick (CERN) ; Esala, Jaakko (CERN) ; Grenier-Boley, Edouard (CERN) ; Hansen, Jan (CERN) ; Huschauer, Alexander (CERN) et al.
For the LHC Injectors Upgrade (LIU) at CERN, the two Proton Synchrotron (PS) internal dumps are being re- designed and upgraded to cope with the future high intensity beams. The dumps are installed as active elements in the lattice, in straight sections between the main bending mag- nets. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMG001 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG001

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2019-04-24
06:12
Upgrade of the CMS Experimental Beam Vacuum During LS2 / Sestak, Josef (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chiggiato, Paolo (CERN) ; Di Paolo, Chiara (CERN)
Starting from December 2018, the Large Hadron Collider (LHC) is going to interrupt its physic operations for more than two years within the period called second long shutdown (LS2). The Compact Muon Solenoid (CMS) experiment will undergo the biggest upgrade of its experimental beam vacuum system since the first operations in 2008. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF090 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF090

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2019-04-24
06:12
LHC Injectors Upgrade Project: Outlook of the Modifications to the Super Proton Synchrotron (SPS) Vacuum System and Impact on the Operation of the Carbon-Coated Vacuum Chambers / Pasquino, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chiggiato, Paolo (CERN) ; Cruikshank, Paul (CERN) ; Farricker, Aaron (CERN) ; Harrison, Anthony (CERN) ; Perez Espinos, Jaime (CERN) ; Somoza, Jose (CERN) ; Taborelli, Mauro (CERN) ; Vollinger, Christine (CERN) et al.
Aiming at doubling the beam intensity and reducing the beam emittance [1], significant modifications of the LHC injector chain will take place during Long Shutdown 2 (LS2), starting from 2019. The LIU project (LHC Injector Upgrade) [2], in the specific, touches Linac4, the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS), the Super Proton Synchrotron (SPS). [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF087 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF087

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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
Impact of Superconducting Magnet Protection Equipment on the Circulating Beam in HL-LHC / Valette, Matthieu (CERN) ; Bortot, Lorenzo (CERN) ; Fernandez Navarro, Alejandro (CERN) ; Lindstrom, Bjorn (CERN) ; Mentink, Matthijs (CERN) ; Ravaioli, Emmanuele (CERN) ; Schmidt, Ruediger (CERN) ; Stubberud, Edvard (CERN) ; Verweij, Arjan (CERN) ; Wollmann, Daniel (CERN)
The new superconducting quadrupole and dipole magnets for the High Luminosity LHC (HL-LHC) will rely on quench heaters or Coupling-Loss Induced Quench (CLIQ) units or a combination of both to protect the magnet coils in case of a quench. After the detection of a quench, the quench heater power supplies will discharge currents of several hundreds of amperes into the quench heater strips glued to the coils, and the CLIQ units will discharge an oscillating current in the order of 1~kA directly into the coils. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-THPAF062 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF062

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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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2019-04-19
09:36
Availability of the TiN Coating-Free Ceramic in the STF-type Power Coupler for ILC / Yamamoto, Yasuchika (KEK, Tsukuba) ; Irikura, Masao (TETD, Otawara) ; Ishibashi, Makoto (TETD, Otawara) ; Julie, Charles (CERN) ; Kako, Eiji (KEK, Tsukuba) ; Matsumoto, Toshihiro (KEK, Tsukuba) ; Michizono, Shinichiro (KEK, Tsukuba) ; Montesinos, Eric (CERN) ; Yamamoto, Akira (KEK, Tsukuba) ; Yasutake, Hiroto (TETD, Otawara)
In the Superconducting RF Test Facility (STF) in KEK, the research and development for the power coupler with the TiN coating-free ceramic has been done from 2014. In 2016, the high power test at the test bench was stopped due to the worse vacuum level by the unusual heating around the RF window with the TiN coating-free ceramic and the coaxial tapered section, which was caused by the enormous emission of the secondary electrons from the ceramic. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-WEPML053 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPML053

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