Measurement of single electron emission in two-phase xenon

B. Edwards, H. M. Araujo, V. Chepel, D. Cline, T. Durkin, J. Gao, C. Ghag, E. V. Korolkova, V. N. Lebedenko, A. Lindote, M. I. Lope, R. Luscher, A. St. J. Murphy, F. Neves, W. Ooi, J. Pinto da Cunha, R. M. Preece, G. Salinas, C. Silva, V. N. SolovovN. J. T. Smith, P. F. Smith, T. J. Sumner, C. Thorne, R. J. Walker, H. Wang, J. T. White, F. L. H. Wolfs, Alex Murphy

Research output: Contribution to journalArticlepeer-review

Abstract

We present the first measurements of the electroluminescence response to the emission of single electrons in a two-phase noble gas detector. Single ionization electrons generated in liquid xenon are detected in a thin gas layer during the 31-day background run of the ZEPLIN-II experiment, a two-phase xenon detector for WIMP dark matter searches. Both the pressure dependence and magnitude of the single electron response are in agreement with previous measurements of electroluminescence yield in xenon. We discuss different photoionization processes as possible cause for the sample of single electrons studied in this work. This observation may have implications for the design and operation of future large-scale two-phase systems. (C) 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)54-57
Number of pages4
JournalAstroparticle Physics
Volume30
Issue number2
DOIs
Publication statusPublished - Sep 2008

Keywords

  • ZEPLIN-II
  • Liquid xenon
  • Electroluminescence
  • Radiation detectors
  • DARK-MATTER DETECTION
  • LIQUID ARGON
  • SOLID XENON
  • DETECTOR
  • LUMINESCENCE
  • SCATTERING
  • EXCITONS
  • KRYPTON
  • PHASE
  • FIELD

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