Author: Galluccio, F.
Paper Title Page
WEPAB023 Crystal Collimation of 20 MJ Heavy-Ion Beams at the HL-LHC 2644
 
  • M. D’Andrea, R. Bruce, M. Di Castro, I. Lamas Garcia, A. Masi, D. Mirarchi, S. Redaelli, R. Rossi, B. Salvachua, W. Scandale
    CERN, Meyrin, Switzerland
  • F. Galluccio
    INFN-Napoli, Napoli, Italy
  • L.J. Nevay
    Royal Holloway, University of London, Surrey, United Kingdom
 
  The con­cept of crys­tal col­li­ma­tion at the Large Hadron Col­lider (LHC) re­lies on the use of bent crys­tals that can de­flect halo par­ti­cles by a much larger angle than the stan­dard multi-stage col­li­ma­tion sys­tem. Fol­low­ing an ex­ten­sive cam­paign of stud­ies and per­for­mance val­i­da­tions, a num­ber of crys­tal col­li­ma­tion tests with Pb ion beams were per­formed in 2018 at en­er­gies up to 6.37 Z TeV. This paper de­scribes the pro­ce­dure and out­comes of these tests, the most im­por­tant of which being the demon­stra­tion of the ca­pa­bil­ity of crys­tal col­li­ma­tion to im­prove the clean­ing ef­fi­ciency of the ma­chine. These re­sults led to the in­clu­sion of crys­tal col­li­ma­tion into the LHC base­line for op­er­a­tion with ion beams in Run 3 as well as for the HL-LHC era. A first set of op­er­a­tional set­tings was de­fined.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB023  
About • paper received ※ 19 May 2021       paper accepted ※ 23 June 2021       issue date ※ 27 August 2021  
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