用于从氙气中去除氪气的熊猫X-4T低温蒸馏系统。

PandaX-4T cryogenic distillation system for removing krypton from xenon.

作者信息

Yan Rui, Wang Zhou, Cui Xiangyi, Ju Yonglin, Sha Haidong, Li Shuaijie, Huang Peiyao, Wang Xiuli, Ma Wenbo, Fan Yingjie, Zhao Li, Liu Jianglai, Ji Xiangdong, Zhou Jifang, Shang Changsong, Liu Liqiang

机构信息

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China.

INPAC and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.

出版信息

Rev Sci Instrum. 2021 Dec 1;92(12):123303. doi: 10.1063/5.0065154.

DOI:10.1063/5.0065154

PMID:34972391

Abstract

An efficient cryogenic distillation system was designed and constructed for the PandaX-4T dark matter detector based on the McCabe-Thiele method and the conservation of mass and energy. This distillation system is designed to reduce the concentration of krypton in commercial xenon from 5 × 10 to ∼10 mol/mol with 99% xenon collection efficiency at a maximum flow rate of 10 kg/h. The offline distillation operation has been completed and 5.75 tons of ultra-high purity xenon was produced, which is used as the detection medium in the PandaX-4T detector. The krypton concentration of the product xenon is measured with an upper limit of 8.0 ppt. The construction, operation, and stable purification performance of the cryogenic distillation system are studied with the experimental data, which is important for theoretical research and distillation operation optimization.

摘要

基于麦凯布-蒂勒方法以及质量和能量守恒原理，为熊猫X-4T暗物质探测器设计并构建了一个高效的低温蒸馏系统。该蒸馏系统旨在将商业氙气中的氪浓度从5×10降至约10摩尔/摩尔，在最大流速为10千克/小时的情况下，氙气收集效率达到99%。离线蒸馏操作已完成，生产出了5.75吨超高纯氙气，用作熊猫X-4T探测器的探测介质。所产氙气的氪浓度经测量，上限为8.0皮克/吨。利用实验数据研究了低温蒸馏系统的构建、运行及稳定的纯化性能，这对理论研究和蒸馏操作优化具有重要意义。