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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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RF Dipole Crab Cavity Testing for HL-LHC
/ Valverde Alonso, Nuria (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Castilla, Alejandro (CERN ; Lancaster U. (main)) ; Chiodini, Marco (CERN) ; Duval, Christophe (CERN) ; Ferreira, Leonel (CERN) ; Gourragne, Max (CERN) ; Kohler, Paul (CERN) et al.
RF Crab Cavities are an essential element of the High Luminosity LHC (HL-LHC) upgrade at CERN. Two RF dipole crab cavity used for the compensation of the horizontal crossing angle were recently manufactured and integrated into Titanium Helium tank and RF ancillaries necessary for the beam operation. [...]
2022 - 7 p.
- Published in : JACoW SRF 2021 (2022) 687-693
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.687-693
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4.
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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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6.
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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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7.
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Status of the HL-LHC Crab Cavity Tuner
/ Artoos, Kurt (CERN) ; Arnaudon, Luca (CERN) ; Calaga, Rama (CERN) ; Cano-Pleite, Eduardo (CERN) ; Capatina, Ofelia (CERN) ; Capelli, Teddy (CERN) ; Cartaxo dos Santos, Duarte (CERN) ; Garlasché, Marco (CERN) ; Glenat, David (CERN) ; Krawczyk, Artur (Cracow, INP ; CERN) et al.
The resonance frequency of the HL-LHC Double Quarter Wave (DQW) and Radio Frequency Dipole (RFD) crab cavities is set to the operating frequency of 400.79 MHz by deforming the cavities. For both types of cavities, the tuning principle foresees a symmetric mechanical deformation of parts of the cavities in vertical direction, with the tuner motor placed outside on top of the vacuum vessel. [...]
SRF2019.-
2019 - 6 p.
- Published in : 10.18429/JACoW-SRF2019-TUP081
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.648-653
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First machine development results with HL-LHC crab cavities in the SPS
/ Carver, Lee (U. Liverpool (main)) ; Alekou, Androula (U. Manchester (main)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert (U. Manchester (main)) ; Bartosik, Hannes (CERN) ; Bohl, Thomas (CERN) ; Burt, Graeme (Lancaster U. (main)) ; Calaga, Rama (CERN) ; Carlà, Michele (CERN) ; Levens, Thomas (CERN) et al.
Crab cavities are a critical component within the High Luminosity upgrade project for the Large Hadron Collider (HL-LHC). It is foreseen to use crab cavities in order to compensate the geometric luminosity reduction factor (reduction of the luminous region at the Interaction Point [IP]) due to the beam crossing angle (required for minimizing the impact of the long range beam-beam effects on the single particle beam dynamics) and increase the number of collisions per bunch crossing. [...]
CERN-ACC-2019-148.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPGW094
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW094
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Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
/ Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Ben-Zvi, Ilan (Stony Brook U. ; Brookhaven Natl. Lab.) ; Burt, Graeme (Lancaster U. ; Daresbury) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Huque, Naeem (Jefferson Lab) ; Li, Zenghai (SLAC) ; McEwen, Anne (Jefferson Lab) ; Mitchell, James (Lancaster U.) ; Park, HyeKyoung (Jefferson Lab) et al.
Crab cavities are one of the several components included in the luminosity upgrade of the Large Hadron Collider (HL-LHC). The cavities have to provide a nominal deflecting kick of 3.4 MV per cavity while the cryogenic load per cavity stays below 5 W. [...]
CERN-ACC-2019-221.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB098
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB098
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HOM Coupler Alterations for the LHC DQW Crab Cavity
/ Mitchell, James (Lancaster U. (main) ; CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Burt, Graeme (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Calaga, Rama (CERN) ; Shipman, Nicholas (Lancaster U. (main) ; CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Wu, Qiong (Brookhaven Natl. Lab.) ; Xiao, Binping (Brookhaven Natl. Lab.)
As part of the High Luminosity Large Hadron Collider (HL-LHC) project, 16 crab cavities are to be installed in the LHC in 2025. The two crab cavity designs are the Double Quarter Wave (DQW) and Radio Frequency Dipole (RFD). [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-SRF2017-MOPB079
Fulltext: PDF;
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.MOPB079
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