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Calibration of a two-phase xenon time projection chamber with a 37Ar source

  • Author(s): Boulton, EM;
  • Bernard, E;
  • Destefano, N;
  • Edwards, BNV;
  • Gai, M;
  • Hertel, SA;
  • Horn, M;
  • Larsen, NA;
  • Tennyson, BP;
  • Wahl, C;
  • McKinsey, DN
  • et al.
Abstract

We calibrate a two-phase xenon detector at 0.27 keV in the charge channel and at 2.8 keV in both the light and charge channels using a 37Ar source that is directly released into the detector. We map the light and charge yields as a function of electric drift field. For the 2.8 keV peak, we calculate the Thomas-Imel box parameter for recombination and determine its dependence on drift field. For the same peak, we achieve an energy resolution, Eσ/Emean, between 9.8% and 10.8% for 0.1 kV/cm to 2 kV/cm electric drift fields.

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