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Open Access Publications from the University of California

Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber

  • Author(s): Edwards, BNV
  • Bernard, E
  • Boulton, EM
  • Destefano, N
  • Gai, M
  • Horn, M
  • Larsen, N
  • Tennyson, B
  • Tvrznikova, L
  • Wahl, C
  • McKinsey, DN
  • et al.

© 2018 IOP Publishing Ltd and Sissa Medialab. We present a measurement of the extraction efficiency of quasi-free electrons from the liquid into the gas phase in a two-phase xenon time-projection chamber. The measurements span a range of electric fields from 2.4 to 7.1 kV/cm in the liquid xenon, corresponding to 4.5 to 13.1 kV/cm in the gaseous xenon. Extraction efficiency continues to increase at the highest extraction fields, implying that additional charge signal may be attained in two-phase xenon detectors through careful high-voltage engineering of the gate-anode region.

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