Author: Banerjee, D.
Paper Title Page
SUPAG05 Muon Background Studies for Beam Dump Operation of the K12 Beam Line at CERN 93
 
  • M.S. Rosenthal, D. Banerjee, J. Bernhard, M. Brugger, N. Charitonidis, B. Döbrich, L. Gatignon, A. Gerbershagen, E. Montbarbon, B. Rae, M.W.U. Van Dijk
    CERN, Geneva, Switzerland
  • T. Spadaro
    INFN/LNF, Frascati, Italy
  
  In the scope of the Physics Be­yond Col­lid­ers study at CERN a fu­ture op­er­a­tion of the NA62 ex­per­i­ment in beam dump mode is dis­cussed, en­abling the search for dark sec­tor par­ti­cles, e.g. heavy neu­tral lep­tons, dark pho­tons and ax­ions. For this pur­pose, the 400 GeV/c pri­mary pro­ton beam, ex­tracted from the SPS, will be dumped on a mas­sive dump col­li­ma­tor lo­cated in the front end of the K12 beam line. Muons orig­i­nat­ing from in­ter­ac­tions and de­cays form a po­ten­tial back­ground for this kind of ex­per­i­ment. To re­duce this back­ground, mag­netic sweep­ing within the beam line is em­ployed. In this con­tri­bu­tion, the muon pro­duc­tion and trans­port has been in­ves­ti­gated with the sim­u­la­tion frame­work G4beam­line. The high com­pu­ta­tional ex­pense of the muon pro­duc­tion has been re­duced by im­ple­ment­ing sam­pling meth­ods and pa­ram­e­triza­tions to es­ti­mate the amount of high-en­ergy muons and ef­fi­ciently study op­ti­miza­tions of the mag­netic field con­fig­u­ra­tion. These meth­ods have been bench­marked with mea­sured data, show­ing a good qual­i­ta­tive agree­ment. Fi­nally, first stud­ies to re­duce the muon back­ground by adapt­ing the mag­netic field con­fig­u­ra­tion are pre­sented, promis­ing a po­ten­tial back­ground re­duc­tion by a fac­tor four.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-SUPAG05  
About • paper received ※ 19 October 2018       paper accepted ※ 28 January 2019       issue date ※ 26 January 2019  
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