Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2021 , Vol. 55 >Issue 7: 834 - 841

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2020.180

Operation Analysis of PandaX-4T Ultra-High Purity Xenon Cryogenic Distillation System for Removal of Krypton

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  • 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Institute of Nuclear and Particle Physics, Shanghai Jiao Tong University, Shanghai 200240, China
    3. Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
    4. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
    5. Paris Tech Elite Institute of Technology, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2020-06-15

  Online published: 2021-06-08

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Abstract

Based on the McCabe-Thiele (M-T) method and the conservation of mass and energy, the PandaX-4T collaboration group designs an efficient cryogenic distillation system to reduce the mole fraction of krypton in commercial xenon from 5×10-7 to 1×10-14. Since the ultra-high purity xenon cryogenic distillation system has completed the offline purification operation, it is necessary to conduct the corresponding operation analysis. Therefore, the stability and purification performance of the ultra-high purity xenon cryogenic distillation system are studied by analyzing the parameters such as temperature, pressure, flowrate, and mole faction of the product xenon in each operating stage. The PandaX-4T cryogenic distillation system has been operating stably for 1.5 m at a collection efficiency of 99% and a purification rate of 10 kg/h, and has purified 5.75 t of xenon. The experimental data show that the system is stable, safe, and reliable in all stages of operation, and the krypton concentration in product xenon is less than 7.99×10-12. The operation analysis of the PandaX-4T ultra-high purity xenon cryogenic distillation system has a theoretical research value and practical engineering significance, providing very important reference for optimization of distillation operation of the next stage.

Key words： cryogenic distillation; ultra-high purity xenon; krypton; dark matter detection

Cite this article

YAN Rui, WANG Zhou, CUI Xiangyi, JU Yonglin, SHA Haidong, LI Shuaijie, HUANG Peiyao, WANG Xiuli . Operation Analysis of PandaX-4T Ultra-High Purity Xenon Cryogenic Distillation System for Removal of Krypton[J]. Journal of Shanghai Jiaotong University, 2021 , 55(7) : 834 -841 . DOI: 10.16183/j.cnki.jsjtu.2020.180

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