Large scale xenon purification using cryogenic distillation for dark matter detectors

A high efficiency cryogenic distillation system for removal of radioactive krypton-85 ( super(85) Kr) from commercially available xenon (Xe) has been designed, developed and assessed to meet the requirements of high sensitivity, low background dark matter detection experiments. The concentration of...

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Published inJournal of instrumentation Vol. 9; no. 11; p. P11024
Main Authors Wang, Z, Bao, L, Hao, X H, Ju, Y L, Pushkin, K, He, M
Format Journal Article
LanguageEnglish
Published 01.11.2014
Subjects
Dark matter
Detectors
Distillation
Efficiency
Instrumentation
Krypton
Sensitivity analysis
Xenon
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Summary:A high efficiency cryogenic distillation system for removal of radioactive krypton-85 ( super(85) Kr) from commercially available xenon (Xe) has been designed, developed and assessed to meet the requirements of high sensitivity, low background dark matter detection experiments. The concentration of krypton (Kr) in a commercial xenon product can be decreased from 10 super(-9) to 10 super(-12) mol/mol based on the theoretical design and simulation. The experimental measurements showed that the concentration of krypton was decreased to 10 super(-11) mol/mol with 99% xenon collection efficiency at maximum flow rate of 5 kg/h. Over 500 kg of xenon has been purified using this system, which has been used as the detection medium in project Panda X, the first dark matter detector developed in China.
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ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/9/11/P11024