Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector

Ji, W.

doi:10.1088/1748-0221/13/05/c05015

Title: Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector

Abstract

High voltage performance has been a challenge for noble element detectors. One piece of this challenge is the emission of electrons from metal electrodes when applying high voltage. This has become a major concern for low-background detectors such as LUX-ZEPLIN (LZ). LZ is a liquid xenon Time Projection Chamber (TPC) searching for Weakly Interactive Massive Particles (WIMPs). In this work, we demonstrate a method to measure electron emission from metallic electrode grids via detection of proportional scintillation light. As a result, we find consistency with Fowler-Nordheim emission with a surface parameter β = 1988 after electro-polishing treatment of a stainless steel grid.

Authors:

Ji, W. ^[1]

SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)

Publication Date:: Mon May 21 00:00:00 EDT 2018

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1458615

Grant/Contract Number:: AC02-76SF00515

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Instrumentation

Additional Journal Information:: Journal Volume: 13; Journal Issue: 05; Journal ID: ISSN 1748-0221

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; Cryogenic detectors; Noble liquid detectors (scintillation, ionization, double-phase)

Citation Formats


                    Ji, W. Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector.  United States: N. p., 2018. 
Web.  doi:10.1088/1748-0221/13/05/c05015.

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                    Ji, W. Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector.  United States.  https://doi.org/10.1088/1748-0221/13/05/c05015

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                    Ji, W. Mon .  
"Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector".  United States.  https://doi.org/10.1088/1748-0221/13/05/c05015.  https://www.osti.gov/servlets/purl/1458615.

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@article{osti_1458615,

  title        = {Metallic wire grid behavior and testing in a low pressure gaseous noble elements detector},

  author       = {Ji, W.},

  abstractNote = {High voltage performance has been a challenge for noble element detectors. One piece of this challenge is the emission of electrons from metal electrodes when applying high voltage. This has become a major concern for low-background detectors such as LUX-ZEPLIN (LZ). LZ is a liquid xenon Time Projection Chamber (TPC) searching for Weakly Interactive Massive Particles (WIMPs). In this work, we demonstrate a method to measure electron emission from metallic electrode grids via detection of proportional scintillation light. As a result, we find consistency with Fowler-Nordheim emission with a surface parameter β = 1988 after electro-polishing treatment of a stainless steel grid.},

  doi          = {10.1088/1748-0221/13/05/c05015},

  journal      = {Journal of Instrumentation},

  number       = 05,

  volume       = 13,

  place        = {United States},

  year         = {Mon May 21 00:00:00 EDT 2018},

  month        = {Mon May 21 00:00:00 EDT 2018}

}

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Journal Article:

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https://doi.org/10.1088/1748-0221/13/05/c05015

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Figures / Tables:

Figure 1: (Left) Overview of the detector. The detector has one PMT on the top, a PTFE reflective cone (green), the anode grid, and the gate grid. (Right) A photo of a wire surface taken with an electron microscope. The trace of the extrusion die can be seen on themore »

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