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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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Design and Vertical Tests of SPS-series Double-Quarter Wave (DQW) Cavity Prototypes for the HL-LHC Crab Cavity SystemDesign and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system
/ Verdú-Andrés, S. (Brookhaven Natl. Lab.) ; Artoos, K. (CERN) ; Belomestnykh, S. (Brookhaven Natl. Lab. ; Fermilab ; Stony Brook U.) ; Ben-Zvi, I. (Brookhaven Natl. Lab. ; Stony Brook U.) ; Boulware, C. (Unlisted, US, MI) ; Burt, G. (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Calaga, R. (CERN) ; Capatina, O. (CERN) ; Carra, F. (CERN) ; Castilla, A. (CERN) et al.
Crab crossing is essential for high-luminosity colliders. The High Luminosity Large Hadron Collider (HL-LHC) will equip one of its Interaction Points (IP1) with Double-Quarter Wave (DQW) crab cavities. [...]
arXiv:1805.08123; FERMILAB-PUB-18-207-TD.-
2018-08-13 - 3 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 082002
Fulltext: thpal146 - PDF; fermilab-pub-18-207-td - PDF; arXiv:1805.08123 - PDF; Fulltext from Publisher: openaccess_PhysRevAccelBeams.21.082002 - PDF; 10.1103_PhysRevAccelBeams.21.082002 - PDF; External link: Fermilab Library Server (fulltext available)
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3.
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Simulation and Measurements of Crab Cavity HOMs and HOM Couplers for HL-LHC
/ Mitchell, James (Lancaster U. (main) ; CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Apsimon, Robert (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Ben-Zvi, Ilan (Brookhaven Natl. Lab.) ; Burt, Graeme (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Calaga, Rama (CERN) ; Castilla, Alejandro (CERN) ; Jones, Thomas (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Macpherson, Alick (CERN) ; Powers, Tom (Jefferson Lab) ; Shipman, Nicholas (Lancaster U. (main) ; CERN ; Cockcroft Inst. Accel. Sci. Tech.) et al.
Two Superconducting Radio-Frequency (SRF) crab cavities are foreseen for the High Luminosity LHC (HL-LHC) upgrade. Preliminary beam tests of the Double Quarter Wave (DQW) crab cavity will take place in the Super Proton Synchrotron (SPS) in 2018. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-SRF2017-THPB059
Fulltext: PDF;
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.THPB059
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Trim Tuning of SPS-Series DQW Crab Cavity Prototypes
/ Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Baurac, Samuel (Adv. Design Consult., Lansing) ; Boulware, Charles (Adv. Design Consult., Lansing) ; Clemens, William (Jefferson Lab) ; Grimm, Terry (Adv. Design Consult., Lansing) ; McEwen, Anne (Jefferson Lab) ; Park, HyeKyoung (Old Dominion U. ; Jefferson Lab) ; Ratti, Alessandro (LBNL, Berkeley ; SLAC) ; Skaritka, John (Brookhaven Natl. Lab.) ; Wu, Qiong (Brookhaven Natl. Lab.) et al.
The final steps in the manufacturing of a superconducting RF cavity involve careful tuning before the final welds to match the target frequency as fabrication tolerances may introduce some frequency deviations. The target frequency is chosen based on analysis of the shifts induced by remaining processing steps including acid etching and cool down. [...]
CERN-ACC-2017-105.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPVA143
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPVA143
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DQW HOM Coupler Design for the HL-LHC
/ Mitchell, James (Lancaster U. ; CERN) ; Burt, Graeme (Lancaster U.) ; Calaga, Rama (CERN) ; Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Xiao, Binping (Brookhaven Natl. Lab.)
HOMs in the DQW crab cavity can produce large heat loads and beam instabilities as a result of the high current HL-LHC beams. The DQW crab cavity has on-cavity, coaxial HOM couplers to damp the HOMs whilst providing a stop-band response to the fundamental mode. [...]
CERN-ACC-2018-141.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAL018
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAL018
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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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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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First RF Performance Results for the DQW Crab Cavities to be Tested in the CERN SPS
/ Castilla, Alejandro (CERN) ; Ben-Zvi, Ilan (Brookhaven Natl. Lab.) ; Burt, Graeme (Lancaster U.) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Dr Schirm, Karl-Martin (CERN) ; Hernández-Chahín, Karim (CERN ; Mexico, ININ) ; Macpherson, Alick (CERN) ; Mitchell, James (Lancaster U.) ; Shipman, Nicholas (Lancaster U. ; U. Manchester (main) ; CERN) et al.
As part of the High Luminosity LHC (HL-LHC) project strategy, crab cavity correctors shall be installed around CMS and ATLAS experiments of the LHC. To accommodate the different crossing angle planes, two distinct cavity designs have been selected: the RF Dipole (RFD) and the Double Quarter Wave resonator (DQW). [...]
CERN-ACC-2017-283.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPVA095
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPVA095
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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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