Scintillation and ionization ratio of liquid argon for electronic and nuclear recoils at drift-fields up to 3 kV/cm

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2 Citations (Scopus)

Abstract

A two-phase argon detector has high discrimination power between electron recoil and nuclear recoil events based on the pulse shape discrimination and the ionization/scintillation ratio (S2/S1). This character is very suitable for the dark matter search to establish the low background experiment. However, the basic properties of S2/S1 of argon are not well known, as compared with xenon. We report the evaluation of S2/S1 properties with a two-phase detector at drift-fields of 0.2–3.0 kV/cm. Finally, the discrimination power against electron recoil background of S2/S1 is discussed.

Original languageEnglish
Pages (from-to)22-25
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume910
DOIs
Publication statusPublished - 2018 Dec 1

Keywords

  • Argon
  • Dark matter
  • Particle identification
  • Time projection camber
  • Two-phase detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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