传导冷却超导磁体系统真空问题的试验研究  

Experimental study on vacuum problem of conduction-cooled superconducting magnet system

作　　者：赵保志[1] 雷沅忠[1] 王秋良[1] 戴银明[1] 宋守森[1] 黄晖[1] 王晖[1] 

机构地区：[1]中国科学院电工研究所,北京100080

出　　处：《真空》2005年第2期41-44,共4页Vacuum

摘　　要：成功研制了 6 T Nb Ti传导冷却超导磁体系统 ,制冷机为二级 GM-制冷机。磁体冷却到 4 K需用 74 h左右 ,目前磁体系统已分别完成了 115 A (6 T) ,4 5 h和 95 A,2 6 4 h的无间断运行实验。制冷机可在长达 15天 (35 9h)的时间里 ,对系统抽真空并维持系统真空在 1.5× 10 - 2 Pa左右 。A 6T NbTi superconducting magnet cooled by a two-stage 4K G-M cryocooler was developed successfully. The magnet was cooled to 4K within about 74 hr. The whole magnet system has been tested for 115A(6T)/45 hr and 95A/264hr continuously till now, of which the existing vacuum could be further rarefied to about 1.5×10~-2　Pa that could be maintained up to 15 days(359 hr)by GM cryocooler with diffusion pump no longer used in the period.

关 键 词：真空 低温泵(G—M制冷机) 超导磁体 杜瓦容器 

分 类 号：TB752.53[一般工业技术—真空技术]