Two-phase Cryogenic Avalanche Detector with electroluminescence gap operated in argon doped with nitrogen

A. Bondar, A. Buzulutskov, A. Dolgov, V. Nosov, L. Shekhtman, E. Shemyakina, A. Sokolov

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A two-phase Cryogenic Avalanche Detector (CRAD) with electroluminescence (EL) gap, operated in argon doped with a minor (49±7 ppm) admixture of nitrogen, has been studied. The EL gap was optically read out using cryogenic PMTs located on the perimeter of the gap. We present the results of the measurements of the N2 content, detector sensitivity to X-ray-induced signals, EL gap yield and electron lifetime in the liquid. The detector sensitivity, at a drift field in liquid Ar of 0.6 kV/cm, was measured to be 9 and 16 photoelectrons recorded at the PMTs per keV of deposited energy at 23 and 88 keV respectively. Such two-phase detectors, with enhanced sensitivity to the S2 (ionization-induced) signal, are relevant in the field of argon detectors for dark matter search and low energy neutrino detection.

Original languageEnglish
Pages (from-to)206-209
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume845
DOIs
Publication statusPublished - 11 Feb 2017

Keywords

  • Argon doped with nitrogen
  • Dark matter detectors
  • Electroluminescence
  • Two-phase detectors
  • AR
  • YIELD
  • RARE-EVENT EXPERIMENTS
  • SCINTILLATION
  • SPECTRA
  • LIQUID ARGON

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