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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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2.
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Design of a compact superconducting crab-cavity for LHC using Nb-on-Cu-coating technique
/ Grudiev, Alexej (CERN) ; Atieh, Said (CERN) ; Calaga, Rama (CERN) ; Calatroni, Sergio (CERN) ; Capatina, Ofelia (CERN) ; Carra, Federico (CERN) ; Favre, Gilles (CERN) ; Ferreira, Leonel (CERN) ; Poncet, Jean-Francois (CERN) ; Richard, Thibaut (CERN) et al.
The design of a compact superconducting crab-cavity for LHC using Nb-on-Cu-coating technique is presented. The cavity shape is based on the ridged waveguide resonator with wide open apertures to provide access to the inner surface of the cavity for coating. [...]
2015 - 5 p.
- Published in : 10.18429/JACoW-SRF2015-THPB048
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.THPB048
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3.
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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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RF Performance Results of RF Double Quarter Wave Resonators for LHC High Luminosity Project
/ Turaj, Katarzyna (CERN) ; Bastard, Jeremy (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Castilla, Alejandro (CERN ; Jefferson Lab) ; Chiodini, Marco (CERN) ; Duval, Christophe (CERN) ; Edwards, Amelia (CERN ; Lancaster U.) ; Ferreira, Leonel (CERN) et al.
The LHC High Luminosity (HL-LHC) project includes, among other key items, the installation of superconducting crab cavities in the LHC machine. The Double Quarter Wave (DQW) crab cavity will be utilised to compensate for the effects of the vertical crossing angle [...]
2023 - 7 p.
- Published in : JACoW SRF 2023 (2023) 925-928
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.925-928
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5.
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Layout and machine optimisation for the SPL at CERN
/ Gerigk, F (CERN) ; Arnau, G (CERN) ; Atieh, S (CERN) ; Calatroni, S (CERN) ; Calaga, R (CERN) ; Capatina, O (CERN) ; Ciapala, E (CERN) ; Eshraqi, M (CERN) ; Ferreira, L (CERN) ; Garoby, R (CERN) et al.
During the past 2 years the Superconducting Proton Linac (SPL) study has grown into an international collaboration with the goal of optimising the architecture of a pulsed superconducting (SC) high-power proton linac. This effort includes the study and prototyping of major technical components, such as SC high-gradient cavities, power couplers, the RF distribution system, HOM couplers, cryo-modules, focusing elements, etc. [...]
CERN-ATS-2010-208.-
Geneva : CERN, 2010 - 3 p.
Fulltext: PDF; Published version from LINAC10: PDF;
In : 25th Linear Accelerator Conference, Tsukuba, Japan, 12 - 17 Sep 2010, pp.THP004
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6.
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Thermal losses in couplers and ports of a SPS Double-Quarter Wave Crab Cavity
/ Verdú-Andrés, Silvia (RIKEN BNL) ; Belomestnykh, Sergey (RIKEN BNL ; SUNY, Stony Brook) ; Burt, Graeme (Lancaster U.) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Carra, Federico (CERN ; INFM, Turin) ; Jones, Thomas (Daresbury) ; Li, Zenghai (SLAC) ; Wu, Qiong (RIKEN BNL) ; Xiao, Binping (RIKEN BNL) et al.
The Double-Quarter Wave Crab Cavity for beam tests at SPS will be equipped with a Fundamental Power Coupler (FPC), three HOM filters and one pickup. FPC and HOM couplers are located in high magnetic field region and have a hook shape. [...]
2015 - 3 p.
- Published in : 10.18429/JACoW-SRF2015-THPB052
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.THPB052
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7.
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State of the Art of Niobium Machining for SRF Applications
/ Naisson, Pierre (CERN) ; Atieh, Said (CERN) ; Dumont, Floriant (Lab. Hubert Curien, St. Etienne) ; Fabre, Dorian (Lab. Hubert Curien, St. Etienne) ; Scibor, Karol (CERN) ; Trubacova, Pavlina (CERN) ; Valiorgue, Frederic (Lab. Hubert Curien, St. Etienne)
Niobium is a demanding material to be machined. Its low hardness, high melting temperature and abrasivity leads to poor cutting condition, and surface quality and shape accuracy could be difficult to achieve, especially for complex shapes such as HOM antennas. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-SRF2019-MOP061
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.210-213
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9.
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LHC Crab Cavity Coupler Test Boxes
/ Mitchell, James (Lancaster U.) ; Apsimon, Robert (Lancaster U.) ; Burt, Graeme (Lancaster U.) ; Calaga, Rama (CERN) ; Macpherson, Alick (CERN) ; Montesinos, Eric (CERN) ; Silva, Subashini (Old Dominion U.) ; Tutte, Adam (Lancaster U.) ; Xiao, Binping (RIKEN BNL)
The LHC double quarter wave (DQW) crab cavities have two different types of Higher Order Mode (HOM) couplers in addition to a fundamental power coupler (FPC). The FPC requires conditioning, so to achieve this we have designed a radio-frequency (RF) quarter wave resonator to provide high transmission between two opposing FPCs. [...]
CERN-ACC-2016-226.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPMB058
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPMB058
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10.
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Assembly of the DQW Crab Cavity Cryomodule for SPS Test
/ Garlaschè, Marco (CERN) ; Artoos, Kurt (CERN) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Capelli, Teddy (CERN) ; El Kbiri, Nordine (CERN ; Altead) ; Krawczyk, Artur (Cracow, INP) ; Lombard, Didier (CERN) ; Marcillac, Pierre-Francois (CERN ; Groupement KA, Heidelberg) ; Minginette, Pierre (CERN) et al.
RF Crab Cavities are an essential part of the High Luminosity Upgrade of the LHC accelerating complex. Two concepts of such superconducting systems are being developed: the Double Quarter Wave (DQW) and the RF Dipole (RFD). [...]
CERN-ACC-2018-136.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPMF078
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF078
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