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 "cold head" 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 1500W cooling power at 178K.The temperature of the "cold head" can be kept stable with an error of 0.02K, its fluctuation is within 0.1K.