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Modeling the Low Level RF Response on the Beam during Crab Cavity Quench

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Abstract

The High Lu­mi­nos­ity Up­grade for the LHC (HL-LHC) re­lies on crab cav­i­ties to com­pen­sate for the lu­mi­nos­ity re­duc­tion due to the cross­ing angle of the col­lid­ing bunches at the in­ter­ac­tion points. In this paper we pre­sent the sim­u­la­tion stud­ies of cav­ity quenches and the im­pact on the beam. The cav­ity volt­age and phase dur­ing the quench is de­ter­mined from a sim­u­la­tion in Mat­lab and used to de­ter­mine the im­pact on the beam from track­ing sim­u­la­tions in Six­Track. The re­sults of this study are im­por­tant for de­ter­min­ing the re­quired ma­chine pro­tec­tion and in­ter­lock sys­tems for HL-LHC.