Design and Commissioning of the PandaX-4T Cryogenic Distillation System for Krypton and Radon Removal

Abstract

An online cryogenic distillation system for the removal of krypton and radon from xenon was designed and constructed for PandaX-4T, a highly sensitive dark matter detection experiment. The krypton content in a commercial xenon product is expected to be reduced by 7 orders of magnitude with 99% xenon collection efficiency at a flow rate of 10 kg/h by design. The same system can reduce radon content in xenon by reversed operation, with an expected radon reduction factor of about 1.8 in PandaX-4T under a flow rate of 56.5 kg/h. The commissioning of this system was completed, with krypton and radon operations tested under respective working conditions. The krypton concentration of the product xenon was measured with an upper limit of 8.0 ppt.

arXiv comment18 pages, 12 figures

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Cited by in corpus (10)

• Dark Matter Search Results from the PandaX-4T Commissioning Run
• Dark Matter Search Results from 1.54 Tonne$\cdot$Year Exposure of PandaX-4T
• Low Radioactive Material Screening and Background Control for the PandaX-4T Experiment
• Design, construction and commissioning of a high-flow radon removal system for XENONnT
• Experimental Analysis of PandaX-4T Cryogenic Distillation System for Removing Krypton from Xenon
• Cosmogenic production of ${}^{37}$Ar in the context of the LUX-ZEPLIN experiment
• Proposal of a Geiger-type Single-Phase Liquid Xenon Time Projection Chamber as Potential Detector Technique for Dark Matter Direct Search
• Reduction of ${}^{222}$Rn-induced Backgrounds in a Hermetic Dual-Phase Xenon Time Projection Chamber
• Probing light mediators with recent PandaX-4T low energy electron recoil data
• Suppression of accidental backgrounds with deep neural networks in the PandaX-II experiment