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Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; Abolins, M; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H; Abreu, R ...
Published in: Journal of Instrumentation
May 20, 2016
Published version (DOI)

This paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of the beam vacuum are revisited. Ghost charge evolution over 2012 and its role for backgrounds are evaluated. New methods to monitor ghost charge with beam-gas rates are presented and observations of LHC abort gap population by ghost charge are discussed in detail. Fake jets from colliding bunches and from ghost charge are analysed with improved methods, showing that ghost charge in individual radio-frequency buckets of the LHC can be resolved. Some results of two short periods of dedicated cosmic-ray background data-taking are shown; in particular cosmic-ray muon induced fake jet rates are compared to Monte Carlo simulations and to the fake jet rates from beam background. A thorough analysis of a particular LHC fill, where abnormally high background was observed, is presented. Correlations between backgrounds and beam intensity losses in special fills with very high β∗ are studied.

Duke Scholars

Ayana T. Arce
Author Ayana T. Arce Physics
Alfred T. Goshaw
Author Alfred T. Goshaw Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
Mark C. Kruse
Author Mark C. Kruse Physics
Seog Oh
Author Seog Oh Physics
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Published In

Journal of Instrumentation

DOI

10.1088/1748-0221/11/05/P05013

EISSN

1748-0221

Publication Date

May 20, 2016

Volume

11

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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MLA
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Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., … Arnold, H. (2016). Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period. Journal of Instrumentation, 11(5). https://doi.org/10.1088/1748-0221/11/05/P05013
Aad, G., B. Abbott, J. Abdallah, O. Abdinov, B. Abeloos, R. Aben, M. Abolins, et al. “Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period.” Journal of Instrumentation 11, no. 5 (May 20, 2016). https://doi.org/10.1088/1748-0221/11/05/P05013.
Aad G, Abbott B, Abdallah J, Abdinov O, Abeloos B, Aben R, et al. Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period. Journal of Instrumentation. 2016 May 20;11(5).
Aad, G., et al. “Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period.” Journal of Instrumentation, vol. 11, no. 5, May 2016. Scopus, doi:10.1088/1748-0221/11/05/P05013.
Aad G, Abbott B, Abdallah J, Abdinov O, Abeloos B, Aben R, Abolins M, AbouZeid OS, Abraham NL, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Affolder AA, Agatonovic-Jovin T, Agricola J, Aguilar-Saavedra JA, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexopoulos T, Alhroob M, Aliev M, Alimonti G, Alison J, Alkire SP, Allbrooke BMM, Allen BW, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Alvarez Gonzalez B, Álvarez Piqueras D, Alviggi MG, Amadio BT, Amako K, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amram N, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anders JK, Anderson KJ, Andreazza A, Andrei V, Angelidakis S, Angelozzi I, Anger P, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aperio Bella L, Arabidze G, Arai Y, Araque JP, Arce ATH, Arduh FA, Arduini G, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Armitage LJ, Arnaez O, Arnold H. Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period. Journal of Instrumentation. 2016 May 20;11(5).
Journal cover image

Published In

Journal of Instrumentation

DOI

10.1088/1748-0221/11/05/P05013

EISSN

1748-0221

Publication Date

May 20, 2016

Volume

11

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences