Investigation of Damping Effects of the Crab Cavity Noise Induced Emittance Growth

Crab cavities will be installed at the two main interaction points (IP1 and IP5) of the High Luminosity LHC (HL-LHC) in order to minimize the geometric reduction of the luminosity due to the crossing angle. Two prototype crab cavities have been installed into the SPS machine and were tested with a p...

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Detalles Bibliográficos
Autores principales: Triantafyllou, Natalia, Antoniou, Fanouria, Bartosik, Hannes, Baudrenghien, Philippe, Buffat, Xavier, Calaga, Rama, Carver, Lee R, Mastoridis, Themis, Papaphilippou, Yannis, Wolski, Andrzej
Lenguaje:eng
Publicado: JACoW 2021
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2021-TUPAB256
http://cds.cern.ch/record/2811864
Descripción
Sumario:Crab cavities will be installed at the two main interaction points (IP1 and IP5) of the High Luminosity LHC (HL-LHC) in order to minimize the geometric reduction of the luminosity due to the crossing angle. Two prototype crab cavities have been installed into the SPS machine and were tested with a proton beam in 2018, to study the expected emittance growth induced by RF noise. The measured emittance growth was found to be a factor 2-3 lower than predicted from the available analytical and computational models. Damping mechanisms from the transverse impedance, which is not included in the available theories, are studied as a possible explanation for the observed discrepancy.

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