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Title: Electroluminescence Yield in low-diffusion Xe-He gas mixtures

Abstract

High pressure xenon Time Projection Chambers based on secondary scintillation, electroluminescence, signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionization trails is a major asset for this type of TPCs when compared to single liquid or double-phase TPCs, limited by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffusion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence yield of XeHe mixtures, in the range of 0 to 30 percent He and demonstrated the small impact on the EL yield of the addition of He to pure Xe. For a typical reduced electric field of 2.5 kV / cm / bar in the scintillation region, the EL yield is reduced by 2 percent, 3 percent, 6 percent and 10 percent for 10 percent, 15 percent, 20 percent and 30 percent of He concentration, respectively, a reduction that is lower than what was expected from simulation results presented in the literature. The impact of the addition of Hemore » on EL statistical fluctuations is negligible, within the experimental uncertainties.« less

Authors:
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
NEXT
OSTI Identifier:
1556978
Report Number(s):
FERMILAB-PUB-19-388-CD-ND; arXiv:1906.03984
1739036
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Fernandes, A.F. M., and et al. Electroluminescence Yield in low-diffusion Xe-He gas mixtures. United States: N. p., 2019. Web.
Fernandes, A.F. M., & et al. Electroluminescence Yield in low-diffusion Xe-He gas mixtures. United States.
Fernandes, A.F. M., and et al. Mon . "Electroluminescence Yield in low-diffusion Xe-He gas mixtures". United States. https://www.osti.gov/servlets/purl/1556978.
@article{osti_1556978,
title = {Electroluminescence Yield in low-diffusion Xe-He gas mixtures},
author = {Fernandes, A.F. M. and et al.},
abstractNote = {High pressure xenon Time Projection Chambers based on secondary scintillation, electroluminescence, signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionization trails is a major asset for this type of TPCs when compared to single liquid or double-phase TPCs, limited by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffusion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence yield of XeHe mixtures, in the range of 0 to 30 percent He and demonstrated the small impact on the EL yield of the addition of He to pure Xe. For a typical reduced electric field of 2.5 kV / cm / bar in the scintillation region, the EL yield is reduced by 2 percent, 3 percent, 6 percent and 10 percent for 10 percent, 15 percent, 20 percent and 30 percent of He concentration, respectively, a reduction that is lower than what was expected from simulation results presented in the literature. The impact of the addition of He on EL statistical fluctuations is negligible, within the experimental uncertainties.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}