Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters

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. Cryogenic RF tests confirmed the required perform...

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Detalles Bibliográficos
Autores principales: Verdú-Andrés, Silvia, Ben-Zvi, Ilan, Burt, Graeme, Calaga, Rama, Capatina, Ofelia, Huque, Naeem, Li, Zenghai, McEwen, Anne, Mitchell, James, Park, HyeKyoung, Powers, Tom, Ratti, Alessandro, Wu, Qiong, Xiao, Binping
Lenguaje:eng
Publicado: 2019
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2019-WEPRB098
http://cds.cern.ch/record/2693248
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author Verdú-Andrés, Silvia
Ben-Zvi, Ilan
Burt, Graeme
Calaga, Rama
Capatina, Ofelia
Huque, Naeem
Li, Zenghai
McEwen, Anne
Mitchell, James
Park, HyeKyoung
Powers, Tom
Ratti, Alessandro
Wu, Qiong
Xiao, Binping
author_facet Verdú-Andrés, Silvia
Ben-Zvi, Ilan
Burt, Graeme
Calaga, Rama
Capatina, Ofelia
Huque, Naeem
Li, Zenghai
McEwen, Anne
Mitchell, James
Park, HyeKyoung
Powers, Tom
Ratti, Alessandro
Wu, Qiong
Xiao, Binping
author_sort Verdú-Andrés, Silvia
collection CERN
description 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. Cryogenic RF tests confirmed the required performances in bare cavities, with several cavities exceeding the required voltage by more than 50%. However, the first tests of a Double-Quarter Wave (DQW) cavity with one out of three Higher-Order Mode (HOM) filters did not reach the required voltage. The present paper describes the studies and tests conducted to understand the limiting factor in the operation of a DQW cavity with HOM filters. The recipe to meet the performance specification and exceed the voltage requirement by more than 35% is discussed.
id oai-inspirehep.net-1745515
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
record_format invenio
spelling oai-inspirehep.net-17455152022-04-08T07:25:28Zdoi:10.18429/JACoW-IPAC2019-WEPRB098http://cds.cern.ch/record/2693248engVerdú-Andrés, SilviaBen-Zvi, IlanBurt, GraemeCalaga, RamaCapatina, OfeliaHuque, NaeemLi, ZenghaiMcEwen, AnneMitchell, JamesPark, HyeKyoungPowers, TomRatti, AlessandroWu, QiongXiao, BinpingCryogenic RF performance of double-quarter wave cavities equipped with HOM filtersAccelerators and Storage RingsCrab 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. Cryogenic RF tests confirmed the required performances in bare cavities, with several cavities exceeding the required voltage by more than 50%. However, the first tests of a Double-Quarter Wave (DQW) cavity with one out of three Higher-Order Mode (HOM) filters did not reach the required voltage. The present paper describes the studies and tests conducted to understand the limiting factor in the operation of a DQW cavity with HOM filters. The recipe to meet the performance specification and exceed the voltage requirement by more than 35% is discussed.CERN-ACC-2019-221oai:inspirehep.net:17455152019
spellingShingle Accelerators and Storage Rings
Verdú-Andrés, Silvia
Ben-Zvi, Ilan
Burt, Graeme
Calaga, Rama
Capatina, Ofelia
Huque, Naeem
Li, Zenghai
McEwen, Anne
Mitchell, James
Park, HyeKyoung
Powers, Tom
Ratti, Alessandro
Wu, Qiong
Xiao, Binping
Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title_full Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title_fullStr Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title_full_unstemmed Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title_short Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
title_sort cryogenic rf performance of double-quarter wave cavities equipped with hom filters
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2019-WEPRB098
http://cds.cern.ch/record/2693248
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