Author: Triantafyllou, N.
Paper Title Page
TUPAB256 Investigation of Damping Effects of the Crab Cavity Noise Induced Emittance Growth 2054
 
  • N. Triantafyllou, L.R. Carver, A. Wolski
    The University of Liverpool, Liverpool, United Kingdom
  • F. Antoniou, H. Bartosik, P. Baudrenghien, X. Buffat, R. Calaga, Y. Papaphilippou, N. Triantafyllou
    CERN, Meyrin, Switzerland
  • L.R. Carver
    ESRF, Grenoble, France
  • T. Mastoridis
    CalPoly, San Luis Obispo, California, USA
  
  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.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB256  
About • paper received ※ 18 May 2021       paper accepted ※ 18 June 2021       issue date ※ 23 August 2021  
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