用于加速腔的YBa_2Cu_3O_(7—δ)超导膜的微结构和微波性能(英文)  

THE MICROSTRUCTURE AND RF PERFORMANCE OF YBa_2Cu_3O_(7-δ) SUPERCONDUCTING FILM FOR ACCELERATING CAVITY

作　　者：吴柏枚[1] 卢江[1] 方家光[2] 吴振一[2] 

机构地区：[1]中国科学技术大学结构分析开放研究实验室 [2]清华大学物理系,北京100084

出　　处：《低温物理学报》1997年第1期39-44,共6页Low Temperature Physical Letters

基　　金：proposed by Dr. D. Proch at DESY, Germany, and the work is completed under his directions;The continuation of work is Supported by National Superconductor Center and National Doctoral Research Foundation (No.020903)

摘　　要：为探索高温氧化物超导膜在加速腔中的应用,我们以金属银为技术衬底,在非平板型及足够大的表面积上电泳沉积YBa_2Cu_3O_(7-δ)超导膜。膜与衬底作为整体经加工和表面抛光。微波测量得到YBa_2Cu_3O_(7-δ)超导膜在77K时500MHz的表面电阻为0.6mW,35GHz的表面电阻为21.88mW,均低于同样条件下纯金属的值。文中给出YBa_2Cu_3O_(7-δ)超导膜的微结构,及其表面电阻,共振频率位移,R_s的频率关系和高场行为等微波性能。For the possible applications of high T_c oxide superconducting films to rf accelerating cavity the electrophoretic technique was applied to coat superconductor YBa_2Cu_3O_(7-δ) on a silver technical substrate. The superconducting film and the substrate taking together was machined and polished. The surface resistance of YBa_2Cu_3O_(7-δ) film at 77K is 0.6mW at 500MHz and 21.88mW at 35GHz respectively, significantly lower than that of pure metal. The microstructure of deposited YBa_2Cu_3O_(7-δ) film and rf properties of the films including surface resistance, resonant frequency shift, frequency dependence of R, and high field behavior etc were studied.

关 键 词：YBCO 超导膜 微结构 微波性能 

分 类 号：TM262[一般工业技术—材料科学与工程]