Comparison between simulated and observed LHC beam backgrounds in the ATLAS experiment at E beam =4 TeV

The ATLAS collaboration

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Results of dedicated Monte Carlo simulations of beam-induced background (BIB) in the ATLAS experiment at the Large Hadron Collider (LHC) are presented and compared with data recorded in 2012. During normal physics operation this background arises mainly from scattering of the 4 TeV protons on residual gas in the beam pipe. Methods of reconstructing the BIB signals in the ATLAS detector, developed and implemented in the simulation chain based on the \textsc{Fluka} Monte Carlo simulation package, are described. The interaction rates are determined from the residual gas pressure distribution in the LHC ring in order to set an absolute scale on the predicted rates of BIB so that they can be compared quantitatively with data. Through these comparisons the origins of the BIB leading to different observables in the ATLAS detectors are analysed. The level of agreement between simulation results and BIB measurements by ATLAS in 2012 demonstrates that a good understanding of the origin of BIB has been reached.

元の言語英語
記事番号P12006
ジャーナルJournal of Instrumentation
13
発行部数12
DOI
出版物ステータス出版済み - 12 4 2018

All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Instrumentation

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