Author: Schaumann, M.
Paper Title Page
MOPAB005 Studies for an LHC Pilot Run with Oxygen Beams 53
 
  • R. Bruce, R. Alemany-Fernández, H. Bartosik, M.A. Jebramcik, J.M. Jowett, M. Schaumann
    CERN, Geneva, Switzerland
 
  Mo­ti­vated by the study of col­lec­tive ef­fects in small sys­tems with oxy­gen-oxy­gen (O-O) col­li­sions, and im­prove­ments to the un­der­stand­ing of high-en­ergy cos­mic ray in­ter­ac­tions from pro­ton-oxy­gen (p-O) col­li­sions, a short LHC oxy­gen run dur­ing Run 3 has been pro­posed. This ar­ti­cle pre­sents es­ti­mates for the ob­tain­able lu­mi­nos­ity per­for­mance in these two run­ning modes based on sim­u­la­tions of a typ­i­cal fill. The re­quested in­te­grated lu­mi­nos­ity, pro­jected beam con­di­tions, data-tak­ing and com­mis­sion­ing times are con­sid­ered and a run­ning sce­nario is pro­posed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB005  
About • paper received ※ 17 May 2021       paper accepted ※ 25 May 2021       issue date ※ 19 August 2021  
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MOPAB023 Experimental Test of a New Method to Verify Retraction Margins Between Dump Absorbers and Tertiary Collimators at the LHC 115
 
  • C. Wiesner, W. Bartmann, C. Bracco, R. Bruce, J. Molson, M. Schaumann, C. Staufenbiel, J.A. Uythoven, M. Valette, J. Wenninger, D. Wollmann, M. Zerlauth
    CERN, Meyrin, Switzerland
 
  The pro­tec­tion of the ter­tiary col­li­ma­tors (TCTs) and the LHC triplet aper­ture in case of a so-called asyn­chro­nous beam dump re­lies on the cor­rect re­trac­tion be­tween the TCTs and the dump re­gion ab­sorbers. A new method to val­i­date this re­trac­tion has been pro­posed, and a proof-of-prin­ci­ple ex­per­i­ment was per­formed at the LHC. The method uses a long orbit bump to mimic the change of the beam tra­jec­tory caused by an asyn­chro­nous fir­ing of the ex­trac­tion kick­ers. It can, thus, be per­formed with cir­cu­lat­ing beam. This paper re­ports on the per­formed beam mea­sure­ments, com­pares them with ex­pec­ta­tions and dis­cusses the po­ten­tial ben­e­fits of the new method for ma­chine pro­tec­tion.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB023  
About • paper received ※ 19 May 2021       paper accepted ※ 25 August 2021       issue date ※ 24 August 2021  
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