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Title: Low-diffusion Xe-He gas mixtures for rare-event detection: electroluminescence yield

Journal Article · · Journal of High Energy Physics (Online)

High pressure xenon Time Projection Chambers (TPC) 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 ionisation trails is a major asset for this type of TPC when compared to single liquid or double-phase TPCs, limited mainly 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 (EL) yield of Xe-He mixtures, in the range of 0 to 30% He and demonstrated the small impact on the EL yield of the addition of helium to pure xenon. For a typical reduced electric field of 2.5 kV/cm/bar in the scintillation region, the EL yield is lowered by ~ 2%, 3%, 6% and 10% for 10%, 15%, 20% and 30% of helium concentration, respectively. This decrease is less than what has been obtained from the most recent simulation framework in the literature. The impact of the addition of helium on EL statistical fluctuations is negligible, within the experimental uncertainties. The present results are an important benchmark for the simulation tools to be applied to future optical TPCs based on Xe-He mixtures.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Texas A & M Univ., College Station, TX (United States); Univ. of Texas, Arlington, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); European Research Council (ERC); European Union's Framework Programme for Research and Innovation Horizon 2020; Ministerio de Economia y Competitividad of Spain; Severo Ochoa Program; Maria de Maetzu Program; Generalitat Valenciana (GVA) of Spain; Portuguese Fundação para a Ciência e Tecnologia (FCT); Ramon y Cajal Program; Maria Curie-Sklodowska University; Spanish Ministerio de Economia y Competitividad (MINECO); USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
The NEXT collaboration; NEXT Collaboration
Grant/Contract Number:
AC02-07CH11359; AC02-06CH11357; FG02-13ER42020; SC0019223; SC0019054; 339787- NEXT; 674896; 690575; 740055; FIS2014-53371-C04; RTI2018-095979; PROMETEO/2016/120; SEJI/2017/011; PD/BD/105921/2014; SFRH/BPD/109180/2015; RYC-2015-18820
OSTI ID:
1556978
Alternate ID(s):
OSTI ID: 1631642; OSTI ID: 1839084
Report Number(s):
FERMILAB-PUB-19-388-CD-ND; arXiv:1906.03984; oai:inspirehep.net:1739036
Journal Information:
Journal of High Energy Physics (Online), Vol. 2020, Issue 4; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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