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2023-02-07
17:53
High Energy LHC Machine Options in the LHC Tunnel / Bottura, Luca (CERN) ; Zimmermann, Frank (CERN)
The LHC infrastructure, i.e. [...]
CERN-ACC-2023-0001. - 2023. - 20 p.

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2023-02-03
13:05
Study of collisional losses in the Large Hadron Collider for Pb-Pb and p-Pb operation / Frasca, Alessandro
During about one month per operational year, the Large Hadron Collider (LHC) at CERN works as a heavy-ion collider [...]
CERN-THESIS-2022-294 - 156 p.


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2023-01-27
14:13
The Effect of Ground Motion on the LHC and HL--LHC Beam Orbit / Schaumann, Michaela ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Corsini, Roberto (CERN) ; Guinchard, Michael (CERN) ; Scislo, Lukasz Grzegorz (Tadeusz Kosciuszko Cracow University of technology (PL)) ; Wenninger, Jorg (CERN)
The High Luminosity Large Hadron Collider (HL--LHC) will require unprecedented orbit stability at the low-beta experiments, ATLAS and CMS [...]
CERN-ACC-NOTE-2022-0076. - 2022. - 32 p.
Full text

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2023-01-26
08:28
An LHCb Vertex Locator (VELO) for 2030s / Gkougkousis, Evangelos Leonidas
The Upgrade II of the LHCb detector, foreseen for 2031, will operate at an instantaneous luminosity of 1.5 x 10$^{34}$ cm$^{-2}$s$^{-1}$, accumulating a sample of more than 300 fb$^{-1}$. [...]
arXiv:2301.10495. -
Fulltext

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2023-01-14
06:10
HOM Couplers and RF Antennas for HL-LHC Crab Cavities: Developments for Manufacturing / Barrière, Simon (CERN) ; Atieh, Said (CERN) ; Bulat, Bartosz (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Demazière, Thomas (CERN) ; Favre, Gilles (CERN) ; Gallifa Terricabras, Adrià (CERN) ; Garlasché, Marco (CERN) et al.
Superconducting RF crab cavities are being manufactured as part of the High-Luminosity LHC project at CERN. Amongst its related ancillaries, radiofrequency HOM (High Order Modes) couplers and field antennas are essential for reaching nominal performance during operation with high energy beams, as they monitor and control the electromagnetic fields in the cavities. [...]
2022 - 5 p. - Published in : JACoW SRF 2021 (2022) 303-307 Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.303-307

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2023-01-14
06:09
Degradation and Recovery of the LHC RF Cryomodule Performance Using the Helium Processing Technique / Turaj, Katarzyna (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) ; Therasse, Mathieu (CERN) ; Venturini Delsolaro, Walter (CERN)
The LHC RF cryomodule "Asia" suffered an accidental influx of about 0.5 l of tunnel air during the leak checks of the pumping manifolds. The resulting risk of particle contamination was difficult to assess, and could not be excluded with certainty. [...]
2022 - 5 p. - Published in : JACoW SRF 2021 (2022) 746-750 Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.746-750

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2023-01-11
06:09
Fortune Telling or Physics Prediction? Deep Learning for On-Line Kicker Temperature Forecasting / Velotti, Francesco (CERN) ; Barnes, Michael (CERN) ; Goddard, Brennan (CERN) ; Revuelta, Irene (CERN)
The injection kicker system MKP of the Super Proton Synchrotron SPS at CERN is composed of 4 kicker tanks. The MKP-L tank provides additional kick needed to inject 26 GeV Large Hadron Collider LHC 25 ns type beams. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 957-960 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.957-960

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2023-01-11
06:09
Prospects to Apply Machine Learning to Optimize the Operation of the Crystal Collimation System at the LHC / D'Andrea, Marco (CERN) ; Azzopardi, Gabriella (CERN) ; Di Castro, Mario (CERN) ; Matheson, Eloise (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Ricci, Gianmarco (CERN ; U. Rome La Sapienza (main)) ; Valentino, Gianluca (CERN ; Malta U.)
Crystal collimation relies on the use of bent crystals to coherently deflect halo particles onto dedicated collimator absorbers. This scheme is planned to be used at the LHC to improve the betatron cleaning efficiency with high-intensity ion beams. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1362-1365 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1362-1365

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2023-01-11
06:09
Experimental Demonstration of Machine Learning Application in LHC Optics Commissioning / Fol, Elena (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Dilly, Joschua (CERN) ; Hofer, Michael (CERN) ; Keintzel, Jacqueline (CERN) ; Le Garrec, Mael (CERN) ; Maclean, Ewen (CERN) ; Persson, Tobias (CERN) ; Soubelet, Felix (CERN) et al.
Recently, we conducted successful studies on the suitability of machine learning (ML) methods for optics measurements and corrections, incorporating novel ML-based methods for local optics corrections and reconstruction of optics functions. After performing extensive verifications on simulations and past measurement data, the newly developed techniques became operational in the LHC commissioning 2022. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 359-362 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.359-362

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2023-01-11
06:09
Matching Studies Between the CERN PSB and PS Using Turn-by-Turn Beam Profile Acquisitions with a Residual Beam Gas Ionisation Monitor / Fraser, Matthew (CERN) ; Coly, Marcel (CERN) ; Guerrero, Ana (CERN) ; Huschauer, Alexander (CERN) ; Jensen, Steen (CERN) ; Levasseur, Swann (CERN) ; Roncarolo, Federico (CERN) ; Rossi, Adriana (CERN) ; Sandberg, Hampus (CERN) ; Storey, James (CERN)
In the framework of the LHC Injectors Upgrade project, the Beam Gas Ionisation (BGI) profile monitors installed in the Proton Synchrotron (PS) were fitted with a gas injection system capable of boosting the signal rate high enough to capture single turn acquisitions immediately after injection. This contribution reports on the studies carried out during the beam commissioning of the BGI system in a turn-by-turn matching monitor mode for its eventual implementation in an optimisation framework to preserve emittance during transfer between the PS Booster and PS. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 2161-2164 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2161-2164

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Utvalda samlingar:
High Luminosity Large Hadron Collider (HL-LHC) (1,071)
HiLumi LHC (264)