Onset of space charge effects in liquid argon ionization chambers

B. Toggerson, A. Newcomer, J. Rutherfoord, R. B. Walker

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Using a thin-gap liquid argon ionization chamber and Strontium-90 beta sources we have measured ionization currents over a wide range of gap potentials. These precision "HV plateau curves" advance the understanding of liquid argon sampling calorimeter signals, particularly at high ionization rates. The order of magnitude differences in the activities of the beta sources allow us to estimate where the ionization chamber is driven into the space-charge dominated regime.

Original languageEnglish (US)
Pages (from-to)238-245
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume608
Issue number2
DOIs
StatePublished - Sep 11 2009

Keywords

  • Liquid argon calorimetry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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