A LN2-based cryogenic system prototype for future PandaX experiment

Abstract

This paper describes results on R&D of an economical and efficient cryogenic system prototype for future liquid xenon detector. The test module of the prototype has a “coldhead” attached to a copper rod, which is specially designed to transport heat loads to a free-boiling liquid nitrogen bath. The performance of the test module and commercial refrigerators is compared. The module with an optimized copper rod has demonstrated more than 1500 W cooling power at 178 K. The temperature of the “cold head” can be kept stable with an error of 0.02 K, its fluctuation is within 0.1 K.