微振动低温氦气恒温器的设计与实验

Design and experiment of micro vibration cryogenic helium thermostat

氦气作为一种导热系数较高的气体,能有效的传递冷量,可以对无法与样品座良好热接触的样品进行有效地冷却。同时对于自身传导性能较差的样品,低温氦气可以为样品提供一个温度均匀性和稳定性都较为理想的低温环境。文中介绍了一种G-M制冷机作为冷源,氦气作为传导介质的低温恒温器的设计。针对G-M制冷机的振动特性,做了实验和优化设计,使得G-M制冷机传递给样品腔的振动大大降低。

As a high thermal conductivity gas, helium can transfer cooling capacity effectively, also can cool the no - good thermal samples effectively. At the same time, for the poor - performance conduction sample, cryogenic helium can provide a cryogenic environment with high uniformity and stability for the sample. This paper introduced the design of a cryogenic thermostat used a G - M refrigerator as cold source, and used helium as the transmission medium. According to the vibration characteristics of G - M refrigerator, an experiment and optimization design were conducted to make the sample ehamber＇s vibration transferred from the G - M cryocooler greatly be weak.