Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance

Crab cavities are a key component of the High Luminosity LHC (HL-LHC) upgrade, as they aim to mitigate the luminosity reduction induced by the crossing angle. Two superconducting crab cavities (CCs) were installed in the Super Proton Synchrotron (SPS) at CERN in 2018 to demonstrate their operation i...

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Autores principales: Triantafyllou, Natalia, Antoniou, Fanouria, Bartosik, Hannes, Baudrenghien, Philippe, Buffat, Xavier, Calaga, Rama, Mastoridis, Themis, Papaphilippou, Yannis, Wolski, Andrzej
Lenguaje:eng
Publicado: 2022
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2022-WEOZSP2
http://cds.cern.ch/record/2845897
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author Triantafyllou, Natalia
Antoniou, Fanouria
Bartosik, Hannes
Baudrenghien, Philippe
Buffat, Xavier
Calaga, Rama
Mastoridis, Themis
Papaphilippou, Yannis
Wolski, Andrzej
author_facet Triantafyllou, Natalia
Antoniou, Fanouria
Bartosik, Hannes
Baudrenghien, Philippe
Buffat, Xavier
Calaga, Rama
Mastoridis, Themis
Papaphilippou, Yannis
Wolski, Andrzej
author_sort Triantafyllou, Natalia
collection CERN
description Crab cavities are a key component of the High Luminosity LHC (HL-LHC) upgrade, as they aim to mitigate the luminosity reduction induced by the crossing angle. Two superconducting crab cavities (CCs) were installed in the Super Proton Synchrotron (SPS) at CERN in 2018 to demonstrate their operation in a proton machine for the first time. An important point to consider is the transverse emittance growth induced by noise in the CC RF system. During a first experimental campaign in 2018, the measured emittance growth was found to be a factor of 4 lower than predicted by analytical models. In this paper, the effects of transverse beam coupling impedance on emittance growth driven by CC RF noise are presented and the results of the second experimental campaign, which took place in the SPS in 2022, are discussed.
id cern-2845897
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
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spelling cern-28458972023-06-07T12:17:39Zdoi:10.18429/JACoW-IPAC2022-WEOZSP2http://cds.cern.ch/record/2845897engTriantafyllou, NataliaAntoniou, FanouriaBartosik, HannesBaudrenghien, PhilippeBuffat, XavierCalaga, RamaMastoridis, ThemisPapaphilippou, YannisWolski, AndrzejSuppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling ImpedanceAccelerators and Storage RingsCrab cavities are a key component of the High Luminosity LHC (HL-LHC) upgrade, as they aim to mitigate the luminosity reduction induced by the crossing angle. Two superconducting crab cavities (CCs) were installed in the Super Proton Synchrotron (SPS) at CERN in 2018 to demonstrate their operation in a proton machine for the first time. An important point to consider is the transverse emittance growth induced by noise in the CC RF system. During a first experimental campaign in 2018, the measured emittance growth was found to be a factor of 4 lower than predicted by analytical models. In this paper, the effects of transverse beam coupling impedance on emittance growth driven by CC RF noise are presented and the results of the second experimental campaign, which took place in the SPS in 2022, are discussed.oai:cds.cern.ch:28458972022
spellingShingle Accelerators and Storage Rings
Triantafyllou, Natalia
Antoniou, Fanouria
Bartosik, Hannes
Baudrenghien, Philippe
Buffat, Xavier
Calaga, Rama
Mastoridis, Themis
Papaphilippou, Yannis
Wolski, Andrzej
Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title_full Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title_fullStr Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title_full_unstemmed Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title_short Suppression of Crab Cavity Noise Induced Emittance Growth by Transverse Beam Coupling Impedance
title_sort suppression of crab cavity noise induced emittance growth by transverse beam coupling impedance
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2022-WEOZSP2
http://cds.cern.ch/record/2845897
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AT wolskiandrzej suppressionofcrabcavitynoiseinducedemittancegrowthbytransversebeamcouplingimpedance

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