CERN Accelerating science

LHC

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2020-04-04
12:59
Simulation of Synchrotron Radiation for the CERN Highest-Energy Accelerators / Guillermo Canton, Gerardo (CINVESTAV Merida)
In circular accelerators at energies in the order of TeV, synchrotron radiation (SR) is very high, even in a hadron beam. SR could be regarded as an important heat load to the cryogenic system cooling the superconducting electromagnets. [...]
CERN-THESIS-2018-468.- 159 p. Fulltext: PDF; External link: Approve this document (restricted)

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2020-04-03
23:06
Simulations of electron-cloud heat load for the cold arcs of the CERN Large Hadron Collider and comparison with measured data / Maury Cuna, Georfrey Humberto Israel (CINVESTAV Merida)
The CERN Large Hadron Collider (LHC) has become a very successful discovery machine. On 4 July 2012 the discovery of a new particle was announced, a candidate to be the famous Higgs boson. [...]
CERN-THESIS-2013-496.- 57 p. Fulltext: PDF; External link: Approve this document (restricted)

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2020-04-01
07:09
Heat load profile estimates on LHC beam screens by thermal transient analysis / Bradu, B (CERN) ; Brodzinski, K (CERN) ; Delikaris, D (CERN) ; Garion, C (CERN) ; Tavian, L (CERN)
The LHC beams are producing significant dynamic heat loads on the LHC cryogenic system. These heat loads are deposited on beam screens, where they must be properly extracted with dedicated cooling loops between 4.6 K and 20 K. [...]
IOP, 2019 - 7 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012116 Fulltext: 10.1088_1757-899X_502_1_012116 - PDF; 814d76eab0f03690fb69b26083cea08d - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012116

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2020-03-21
06:03
Emittance growth from luminosity burn-off in future hadron colliders / Tomás, R (CERN) ; Keintzel, J (CERN) ; Papadopoulou, S (CERN)
Future hadron colliders aim at producing larger integrated luminosities by burning-off an increased fraction of the bunch particles. This burn-off removes particles unevenly in the bunch distribution generating an emittance growth. [...]
2020 - 9 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 031002 Fulltext: PDF;

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2020-03-20
08:36
Report from ARIES Muon Collider Workshop in Padua / Zimmermann, Frank (CERN) ; Zanetti, Marco (INFN, Padua)
Several novel concepts could help the muon collider become a reality. These concepts include parametric ionization cooling, low-emittance muon production by positron annihilation (LEMMA scheme), production of low-emittance muon or positron beams using the Gamma Factory concept, and strategies to upgrade large accelerator complexes, like the LHC or the FCC, into a highest-energy muon collider. [...]
JACOW, 2019 - 5 p. - Published in : 10.18429/JACoW-eeFACT2018-MOYBA04 Fulltext: moyba04 - PDF; 74491b38e7f06efb770c2932553e8df6 - PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.MOYBA04

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2020-03-19
07:03
FCC-ee Operation Model, Availability & Performance / Zimmermann, Frank (CERN) ; Apollonio, Andrea (CERN) ; Benedikt, Michael (CERN) ; Brunner, Olivier (CERN) ; Funakoshi, Yoshihiro (KEK, Tsukuba) ; Milardi, Catia (Frascati) ; Myers, Stephen (CERN) ; Niemi, Arto (Tampere U. of Tech.) ; Oide, Katsunobu (KEK, Tsukuba) ; Qin, Qing (Beijing, Inst. High Energy Phys.) et al.
This document discusses the machine parameters and expected luminosity performance for the proposed future circular lepton collider FCC-ee. Particular emphasis is put on availability, physics run time, and efficiency. [...]
JACOW, 2019 - 7 p. - Published in : 10.18429/JACoW-eeFACT2018-WEPAB03 Fulltext: d6c8f5321207eff74262e996e195834c - PDF; wepab03 - PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEPAB03

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2020-03-10
09:08
An Insight on the Thermal and Mechanical Numerical Evaluations for the High-Luminosity LHC Crab Cavities / Cano-Pleite, Eduardo (CERN) ; Amorim Carvalho, Alexandre (CERN) ; Artoos, Kurt (CERN) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Capelli, Teddy (CERN) ; Carra, Federico (CERN) ; Dassa, Luca (CERN) ; Garlasché, Marco (CERN) ; Leuxe, Raphael (CERN) et al.
One of the key devices of the HL-LHC project are SRF crab cavities. A cryomodule with two Double Quarter Wave (DQW) crab cavities has been successfully fabricat-ed and tested with beam at CERN whereas the Radio Frequency Dipole (RFD) crab cavities are currently on its fabrication process. [...]
2019 - 6 p. - Published in : (2019) , pp. 931-936 Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.931-936

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2020-03-10
09:08
Design of LHC Crab Cavities Based on DQW Cryomodule Test Experience / Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Calaga, Rama (CERN) ; Cano-Pleite, Eduardo (CERN) ; Leuxe, Raphael (CERN) ; Mitchell, James (Lancaster U. ; CERN)
A cryomodule with two Double-Quarter Wave (DQW) cavities was designed, built and tested with the SPS beam in 2018. Each cavity was equipped with an rf pickup antenna to monitor field amplitude and phase. [...]
SRF2019.- 2019 - 4 p. - Published in : 10.18429/JACoW-SRF2019-THP035 Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.927-930

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2020-03-10
09:08
Operation Experience with the LHC ACS RF System / Turaj, Katarzyna (CERN) ; Arnaudon, Luca (CERN) ; Baudrenghien, Philippe (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Karppinen, Mikko (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) et al.
The LHC accelerating RF system consists of two cryomodules per beam, each containing four single-cell niobium sputtered 400.8 MHz superconducting cavities working at 4.5 K and an average accelerating voltage of 2 MV. The paper summarises the experience, availability and evolution of the system within 10 years of operation. [...]
SRF2019.- 2019 - 4 p. - Published in : 10.18429/JACoW-SRF2019-THP031 Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.913-916

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2020-03-06
16:25
MD1787 - LHC TDI tune shift measurement at injection / Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Carbajo Perez, David (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Rijoff, Tatiana Libera ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN) ; Valuch, Daniel (CERN)
This report summarizes the results of the backup activity performed after cancellation of the MD1787 [...]
CERN-ACC-NOTE-2020-0015.
- 2019. - 3 p.
Full text

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