一种零蒸发率低温超导磁体系统的研制  

Development of the low-temperature superconducting magnet system with zero rate evaporation

作　　者：张海峰[1,2] 叶海峰[1,2] 王福堂[3] 陈治友[3] 丁怀况[1,2] 罗高乔[1,2] 章学华[1,2] 武义锋[1,2] 陈文革[3] 

机构地区：[1]中国电子科技集团公司第十六研究所,合肥230043 [2]安徽万瑞冷电科技有限公司,合肥230088 [3]中国科学院强磁场科学中心,合肥230031

出　　处：《低温与超导》2014年第6期10-13,共4页Cryogenics and Superconductivity

摘　　要：介绍了零蒸发率低温超导磁体系统的设计与研制。整个系统主要包含超导磁体与低温冷却两部分。超导磁体使用NbTi线绕制,采用主线圈加补偿线圈的结构,中心磁场强度最大可达5.7T。磁体通过4.2K级G-M制冷机冷却,同时每天可生产约5L液氦。系统自常温开机运行,约45小时后开始生产液氦,液氦液面高于超导磁体2/3时,停止氦气供给。磁体加电闭环运行后,系统可实现静态零蒸发率。This paper described the design and development of cryogenic superconducting magnet system with zero evaporation rate of helium. The whole system mainly consisted of two parts, superconducting magnet and cryogenic cooling. NbTi wire was used for superconducting magnet winding, which the structure was primary coil plus compensation coils. The intensity of cen- ter magnetic field was up to 5.7T. A 4.2K G - M refrigerator provided cooling for magnet, meanwhile it could produce 5L liquid helium each day. If the system began running at room temperature, liquid helium would be produced about 45 hours later. When the liquid helium level was above the 2/3 of superconducting magnet height, the supply of helium gas was stopped. During the closed loop operation, the system could achieve the static zero evaporation rate.

关 键 词：低温超导磁体 零蒸发率 G—M制冷机 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]