上海光源超导波荡器降温特性实验研究  

Experiment study on cooling characteristics of superconducting undulator at the Shanghai synchrotron radiation facility

作　　者：吴腾马 周巧根 张继东[1,2] 朱亚 Wu Tengma;Zhou Qiaogen;Zhang Jidong;Zhu Ya(Shanghai Institute of Advanced Research,Chinese Academy of Sciences,Shanghai 201204,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学院上海高等研究院,上海201204 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《低温与超导》2022年第2期89-93,共5页Cryogenics and Superconductivity

基　　金：上海市科技重大专项(2017SHZDZX02);中国科学院上海应用物理研究所PLS-IVO30真空内波荡器项目(1105000503)资助。

摘　　要：为解决超导波荡器磁体采用G-M制冷机传导冷却温度不均匀的问题,采用以G-M制冷机为冷源、将氦为传热工质冷却超导波荡器。通过采用两台E415制冷机预冷氦气并积液冷却磁体的方式,将氦槽内压力调节至1.6 bar—1.9 bar的工况下,可在制冷机开启55 h后将磁体从室温冷却至4.5 K,在75 h后在氦槽内完成积液50%的目标,并在87 h后将磁体冷却至3.8 K下稳定,磁体与冷头的温差约0.3 K,验证了系统利用氦气冷凝积液作为传热工质并冷却超导波荡器磁体的功能。In order to solve the problem of uneven temperature in magnet when superconducting undulator was cooled by GM refrigerator, GM refrigerator was used as the cold source and helium was used as the heat transfer medium to cool the superconducting undulator in this study.By means of precooling helium with two E415 refrigerators and accumulating liquid to cool the magnet, the pressure in the helium tank could be adjusted to 1.6 bar to 1.9 bar, and the magnet could be cooled from room temperature to 4.5 K after the refrigerator was turned on for 55 h. After 75 h, the target of 50% effusion was completed in the helium tank and the magnet was cooled to 3.8 K after 87 h to stability. The temperature difference between magnet and cold head is about 0.3 K. The function of the system using helium as heat transfer medium and cooling superconducting undulator magnet is verified.

关 键 词：超导波荡器 G-M制冷机 积液降温 降温特性 

分 类 号：TQ025.2[化学工程] TM265[一般工业技术—材料科学与工程]