2018-02-21 12:14 |
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2018-01-25 13:18 |
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2017-12-21 09:43 |
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2017-10-18 06:37 |
Improved Protection of the Warm Magnets of the LHC Betatron Cleaning Insertion
/ Bahamonde Castro, Cristina (CERN) ; Cerutti, Francesco (CERN) ; Fessia, Paolo (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Skordis, Eleftherios (U. Liverpool (main) ; CERN)
After the High Luminosity (HL) upgrade in 2024-2026, the LHC is anticipated to increase its integrated luminosity by a factor of 10 beyond its original design value of 300 fb-1. In preparation for this, several improvements to the equipment will already be implemented during the next Long Shutdown (LS2) starting in 2019. [...]
CERN-ACC-2017-120.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB004
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB004
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2017-10-18 06:36 |
Studies on Luminous Region, Pile-up and Performance for HL-LHC Scenarios
/ Medina Medrano, Luis (CERN ; Unlisted, MX) ; Arduini, Gianluigi (CERN) ; Tomás, Rogelio (CERN)
Studies on luminous region and pile-up density are of great interest for the experiments at the future High Luminosity LHC (HL-LHC) in order to optimize the detector performance. The evolution of these parameters at the two main interaction points of the HL-LHC along optimum physics fills is studied for the baseline and alternative operational scenarios with the latest set of parameters, including a refined description of the longitudinal bunch profile. [...]
CERN-ACC-2017-135.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK089
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK089
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2017-10-18 06:36 |
HL-LHC Alignment Requirements and Associated Solutions
/ Mainaud Durand, Helene (CERN) ; Bartolome-Jimenez, Sonia (CERN) ; Dijoud, Thibault (CERN) ; Duquenne, Mathieu (ESGT, Le Mans) ; Herty, Andreas (CERN) ; Rude, Vivien (ESGT, Le Mans) ; Sosin, Mateusz (CERN)
To increase by more than 10 times the luminosity reach w.r.t the first 10 years of the LHC lifetime, the HL-LHC project will replace nearly 1.2 km of the accelerator during the Long Shutdown 3 scheduled in 2024 [1][2][3]. This paper presents the HL-LHC alignment and internal metrology requirements of all the new components to be installed, from the magnet components to the beam instrumentation and vacuum devices. [...]
CERN-ACC-2017-138.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK085
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK085
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2017-10-18 06:36 |
Radiation Levels at the LHC: 2012, 2015 and 2016 Proton Physics Operations in View of HL-LHC requirements
/ Martinella, Corinna (CERN) ; Brugger, Markus (CERN) ; Danzeca, Salvatore (CERN) ; Garcia Alia, Ruben (CERN) ; Kadi, Yacine (CERN) ; Stein, Oliver (CERN) ; Xu, Chen (CERN)
The variety of beam losses produced in the Large Hadron Collider (LHC) creates a mixed and complex radiation field. During 2012, 2015 and 2016, Beam Loss Monitors and RadMons were used to monitor the inte-grated dose and the High Energy Hadrons fluence in order to anticipate the electronics degradation and inves-tigate the cause of failures. [...]
CERN-ACC-2017-142.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA015
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA015
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2017-10-18 06:36 |
Lessons Learnt from the 2016 LHC Run and Prospects for HL-LHC Availability
/ Apollonio, Andrea (CERN) ; Rey Orozko, Odei (CERN) ; Schmidt, Ruediger (CERN) ; Valette, Matthieu (CERN) ; Wollmann, Daniel (CERN) ; Zerlauth, Markus (CERN)
The LHC exhibited unprecedented availability during the 2016 proton run, producing about 40 fb-1 of integrated luminosity, surpassing the sum of production during the 4 previous years. This was achieved while running steadily with a peak luminosity above the design target of 1034 cm- 2s^{−1}. [...]
CERN-ACC-2017-145.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA006
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA006
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2017-10-18 06:36 |
Measurement of Beta-Beating Due to Strong Head-on Beam-Beam Interactions in the LHC
/ Gonçalves Jorge, Patrik (Ecole Polytechnique, Lausanne) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Carlier, Felix (CERN) ; Coello de Portugal, Jaime Maria (CERN) ; Fol, Elena (CERN) ; Medina Medrano, Luis (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN) ; Wegscheider, Andreas (CERN)
The LHC operation relies on a good knowledge of the optics, usually corrected in absence of beam-beam interactions. In a near future, both the LHC and the HL-LHC will need to cope with large head-on beam-beam parameters, the impact on the optics needs to be understood and, if necessary, corrected. [...]
CERN-ACC-2017-151.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA030
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA030
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2017-10-18 06:36 |
Observations of Emittance Growth in the Presence of External Noise in the LHC
/ Buffat, Xavier (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tambasco, Claudia (Ecole Polytechnique, Lausanne ; CERN) ; Valuch, Daniel (CERN)
Dedicated experiments were perfomed in the LHC to study the impact of noise on colliding high brightness beams. The results are compared to theoretical models and multiparticle tracking simulations. [...]
CERN-ACC-2017-152.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA029
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA029
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