Luminosity limits for liquid argon calorimetry

J. Rutherfoord, R. B. Walker

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

We have irradiated liquid argon ionization chambers with betas using high-activity Strontium-90 sources. The radiation environment is comparable to that in the liquid argon calorimeters which are part of the ATLAS detector installed at CERN's Large Hadron Collider. We measure the ionization current over a wide range of applied potential for two different source activities and for three different chamber gaps. These studies provide operating experience at exceptionally high ionization rates. We can operate these chambers either in the normal mode or in the space-charge limited regime and thereby determine the transition point between the two. From the transition point we indirectly extract the positive argon ion mobility.

Original languageEnglish (US)
Article number012016
JournalJournal of Physics: Conference Series
Volume404
Issue number1
DOIs
StatePublished - Jan 1 2012
Event15th International Conference on Calorimetry in High Energy Physics, CALOR 2012 - Santa Fe, NM, United States
Duration: Jun 4 2012Jun 8 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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