射频超导腔加速性能的改进  

Performance improvment of RF superconducting cavity

作　　者：李欣[1] 陈强[1] 辛天牧[2] 郝建奎[2] 

机构地区：[1]北京航空航天大学理学院物理系,北京100083 [2]北京大学重离子物理教育部重点实验室重离子物理研究所,北京100871

出　　处：《强激光与粒子束》2006年第9期1581-1584,共4页High Power Laser and Particle Beams

基　　金：国家973项目资助课题(2002CB713603)

摘　　要：为提高超导加速腔的加速梯度和Q值,改进了薄膜型超导腔的加速性能。研究证明,对于铜铌溅射腔,在无氧铜衬底和铌膜之间加入NbN层可以提高铌膜的超导转变温度,改善晶格结构;对纯铌超导腔提出了改进方法,在传统的纯铌超导腔表面制备多层的超导-绝缘-超导复合膜可以屏蔽Nb腔表面的界面场,提高超导腔的临界磁场,从而提高了铌腔的加速梯度。To improve the acceleration properties of the niobium cavities and niobium-sputtered copper cavities, studies are carried out. For niobium-sputtered copper cavities, by adding a layer of NbN between the copper and niobium, the transition temperature of the superconducting film can be increased so that the superconducting properties can be improved. Analysis shows that the accelerating gradient can be improved by preparing SIS multilayers on the surface of the superconducting cavities.

关 键 词：溅射 超导腔 氮化铌 超导转变温度 超导-绝缘-超导 

分 类 号：O469[理学—凝聚态物理]