Experimental Analysis of PandaX-4T Cryogenic Distillation System for Removing Krypton from Xenon

Abstract

An efficient cryogenic distillation system was designed and constructed for PandaX-4T dark matter detector based on the McCabe-Thiele (M-T) method and the conservation of mass and energy. This distillation system is designed to reduce the concentration of krypton in commercial xenon from 5X$10^{-7}$ mol/mol to $10^{-14}$ 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 PandaX-4T detector. The krypton concentration of the product xenon is measured with an upper limit of 8.0 ppt. The stability and purification performance of the cryogenic distillation system are studied by analyzing the experimental data, which is important for theoretical research and distillation operation optimization.

References in corpus (12)

• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Dark Matter Results from 225 Live Days of XENON100 Data
• Liquid Xenon Detectors for Particle Physics and Astrophysics
• Liquid noble gas detectors for low energy particle physics
• Dark matter direct search sensitivity of the PandaX-4T experiment
• XMASS detector
• Distillation of Liquid Xenon to Remove Krypton
• Removing krypton from xenon by cryogenic distillation to the ppq level
• Low-mass dark matter search results from full exposure of PandaX-I experiment
• A direct dark matter search in XMASS-I
• Detection of krypton in xenon for dark matter applications
• Design and Commissioning of the PandaX-4T Cryogenic Distillation System for Krypton and Radon Removal

Cited by in corpus (4)

• PandaX-xT: a Multi-ten-tonne Liquid Xenon Observatory at the China Jinping Underground Laboratory
• Reactor neutrino liquid xenon coherent elastic scattering experiment
• Search for Light Dark Matter with 259-day data in PandaX-4T
• Preparation and measurement of an ${}^{37}$Ar source for liquid xenon detector calibration