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

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Published 10 January 2018 • © 2018 IOP Publishing Ltd and Sissa Medialab
, , Citation B.N.V. Edwards et al 2018 JINST 13 P01005 DOI 10.1088/1748-0221/13/01/P01005

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Author affiliations

1 Department of Physics, Yale University, 217 Prospect St., New Haven, CT 06511, U.S.A.

2 Department of Physics, University of California Berkeley, Berkeley, CA 94720, U.S.A.

3 Lawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.A.

4 Department of Physics, University of Connecticut, 2152 Hillside Road, Storrs, CT 06269, U.S.A.

5 LNS at Avery Point, University of Connecticut, 1084 Shennecossett Road, Groton, CT 06340, U.S.A.

Dates

  1. Received 6 November 2017
  2. Accepted 19 December 2017
  3. Published

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1748-0221/13/01/P01005

Abstract

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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