High Purity Xenon Management and Heat Management Design for Hundred Tons Scale Liquid Xenon Experiment

PandaX detector is bigger and bigger in past decades as other xenon detectors, e.g., XENON and LZ experiment, the far future detector is hundred tons scale, however, and the current xenon management technology has following disadvantage:low filling speed, high energy cost, low efficient due to phase change in filling and recuperation process.Therefore, it is necessary to develop large scale high purity xenon storage and highly efficient heat management system for future PandaX detector. The national standard large capacity seamless steel gas cylinder operating temperature is 233~333 K and maximum operating pressure is 20 MPa, the xenon equilibrium pressure is less 1.8 MPa at 238 K, so 1 750 kg/m³ xenon filling ratio is reasonable which has low specific enthalpy, and it can be transfer by gear pump which has no dynamic sealing. Pre-cooling and stepped cooling process can maxim utilize 160 K refrigerator, the xenon filling speed is 7.5 t/d for 1kw cooling power. The proposal demonstrate that it is feasible to storage, quickly liquification and recuperation hundred tons scale xenon in China Jinping Underground Lab, which is helpful for future xenon detector and underground lab infrastructure design.