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

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arxiv 1710.11032 v3 pith:6FVVDDOB submitted 2017-10-30 physics.ins-det hep-ex

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

B. N. V. Edwards , E. Bernard , E. M. Boulton , N. Destefano , M. Gai , M. Horn , N. Larsen , B. Tennyson
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L. Tvrznikova C. Wahl D. N. McKinsey
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classification physics.ins-det hep-ex
keywords xenonextractionefficiencytwo-phasechamberelectronsfieldsliquid
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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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