Two distinct components of the delayed single electron noise in liquid xenon emission detectors

Sorensen, P.; Kamdin, K.

doi:10.1088/1748-0221/13/02/p02032

Title: Two distinct components of the delayed single electron noise in liquid xenon emission detectors

Abstract

Single electron noise which persists for many milliseconds is known to follow ionizing events in liquid/gas xenon emission detectors. Due to the long timescale, this noise can be mistaken for a genuine signal. Therefore, it is a limiting background to the low-energy threshold of dark matter searches, and could prevent discovery-class searches for MeV scale hidden sector dark matter. A systematic study reveals distinct fast and slow components to the noise. The fast component is compatible with the hypothesis of electrons which were trapped below the liquid surface, and can be reduced by increasing the electric field across the liquid/gas interface. However, the slow component increases linearly with electric field. Hypotheses for the origin of this effect are discussed, and techniques for mitigation are suggested.

Authors:

Sorensen, P. ^[1]; Kamdin, K. ^[2]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Physics

Publication Date:: Tue Feb 27 00:00:00 EST 2018

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1485080

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Instrumentation

Additional Journal Information:: Journal Volume: 13; Journal Issue: 02; Journal ID: ISSN 1748-0221

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 47 OTHER INSTRUMENTATION; Dark Matter detectors (WIMPs, axions, etc.); Noble liquid detectors (scintillation, ionization, double-phase); Time projection Chambers (TPC)

Citation Formats


                    Sorensen, P., and Kamdin, K. Two distinct components of the delayed single electron noise in liquid xenon emission detectors.  United States: N. p., 2018. 
Web.  doi:10.1088/1748-0221/13/02/p02032.

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                    Sorensen, P., & Kamdin, K. Two distinct components of the delayed single electron noise in liquid xenon emission detectors.  United States.  https://doi.org/10.1088/1748-0221/13/02/p02032

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                    Sorensen, P., and Kamdin, K. Tue .  
"Two distinct components of the delayed single electron noise in liquid xenon emission detectors".  United States.  https://doi.org/10.1088/1748-0221/13/02/p02032.  https://www.osti.gov/servlets/purl/1485080.

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@article{osti_1485080,

  title        = {Two distinct components of the delayed single electron noise in liquid xenon emission detectors},

  author       = {Sorensen, P. and Kamdin, K.},

  abstractNote = {Single electron noise which persists for many milliseconds is known to follow ionizing events in liquid/gas xenon emission detectors. Due to the long timescale, this noise can be mistaken for a genuine signal. Therefore, it is a limiting background to the low-energy threshold of dark matter searches, and could prevent discovery-class searches for MeV scale hidden sector dark matter. A systematic study reveals distinct fast and slow components to the noise. The fast component is compatible with the hypothesis of electrons which were trapped below the liquid surface, and can be reduced by increasing the electric field across the liquid/gas interface. However, the slow component increases linearly with electric field. Hypotheses for the origin of this effect are discussed, and techniques for mitigation are suggested.},

  doi          = {10.1088/1748-0221/13/02/p02032},

  journal      = {Journal of Instrumentation},

  number       = 02,

  volume       = 13,

  place        = {United States},

  year         = {Tue Feb 27 00:00:00 EST 2018},

  month        = {Tue Feb 27 00:00:00 EST 2018}

}

Copy to clipboard

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Figure 1: (Left) A schematic sectional view of the internal construction of the cylindrical test bed, with segmented anode (A), cathode grid (K), shield grid (G) and the location of the ²¹⁰Po source (S) indicated. (Right) The configuration of the segmented anode as seen from below.

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Title: Two distinct components of the delayed single electron noise in liquid xenon emission detectors

Abstract

Citation Formats

Figures / Tables:

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Color and fluorescence of polytetrafluoroethylene treated by γ-irradiation near the melting point journal, November 2011

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Ab initio effective core potentials including relativistic effects. II. Potential energy curves for Xe2, Xe+2, and Xe∗2 journal, January 1978

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Evidence for a triplet state of the self-trapped exciton states in liquid argon, krypton and xenon
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Color and fluorescence of polytetrafluoroethylene treated by γ-irradiation near the melting point
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Ab initio effective core potentials including relativistic effects. II. Potential energy curves for Xe2, Xe+2, and Xe∗2
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