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arXiv · 1710.11032

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·L. Tvrznikova·C. Wahl·D. N. McKinsey
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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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B. N. V. Edwards, E. Bernard, E. M. Boulton, N. Destefano, M. Gai, M. Horn, N. Larsen, B. Tennyson, L. Tvrznikova, C. Wahl, D. N. McKinsey. 2018-01-07. Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber. https://doi.org/10.1088/1748-0221%2F13%2F01%2Fp01005

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