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Title: Electron extraction efficiency study for dual-phase xenon dark matter experiments

Journal Article · · Physical Review D
 [1];  [1];  [2];  [1];  [3];  [1];  [1];  [3]
  1. Univ. of California, Davis, CA (United States). Dept. of Physics
  2. Univ. of California, Davis, CA (United States). Dept. of Physics; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Dual-phase xenon detectors are widely used in dark matter direct detection experiments, and have demonstrated the highest sensitivities to a variety of dark matter interactions. However, a key component of the dual-phase detector technology—the efficiency of charge extraction from liquid xenon into gas—has not been well characterized. We report a new measurement of the electron extraction efficiency (EEE) in a small xenon detector using two monoenergetic decay features of $$^{37}\mathrm{Ar}$$. By achieving stable operation at very high voltages, we measured the EEE values at the highest extraction electric field strength reported to date. For the first time, an apparent saturation of the EEE is observed over a large range of electric field; between 7.5 and $$10.4\text{ }\text{ }\mathrm{kV}/\mathrm{cm}$$ extraction field in the liquid xenon the EEE stays stable at the level of 1% $$(\mathrm{kV}/\mathrm{cm}{)}^{{-}1}$$. In the context of electron transport models developed for xenon, we discuss how the observed saturation may help calibrate this relative EEE measurement to the absolute EEE values. In addition, we present the implications of this result not only to current and future xenon-based dark matter searches, but also to xenon-based searches for coherent elastic neutrino-nucleus scatters.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Grant/Contract Number:
AC52-07NA27344; NA0000979
OSTI ID:
1524736
Alternate ID(s):
OSTI ID: 1518507
Report Number(s):
LLNL-JRNL-758497; 946651
Journal Information:
Physical Review D, Vol. 99, Issue 10; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber text January 2017
Calibration, event reconstruction, data analysis and limits calculation for the LUX dark matter experiment text January 2017
Two-Phase Emission Detector for Measuring Coherent Neutrino-Nucleus Scattering text January 2004
Secondary Scintillation Yield in Pure Xenon text January 2007
Exclusion of leptophilic dark matter models using XENON100 electronic recoil data text January 2015

Cited By (1)

Low-Energy Physics Reach of Xenon Detectors for Nuclear-Recoil-Based Dark Matter and Neutrino Experiments journal December 2019