RESIDUAL SURFACE LOSSES IN THIN-FILM COATED RF SUPERCONDUCTING CAVITIES

被引：4

作者：

ATTANASIO, C

MARITATO, L

VAGLIO, R

机构：

[1] Dipartimento di Fisica, Universita’ di Salerno, 1- 84081, Baronissi, Salerno

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

关键词：

D O I：

10.1109/20.133577

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Residual losses are known to be one of the main factors limiting the performances of r.f. superconducting cavities for particle accelerators. In particular, in thin film sputter-coated cavities, residual terms that are strongly dependent on the r.f. field amplitude have been observed in the surface resistance. In the present paper, it is shown that r.f. losses at the grain boundaries can be one of the main sources of the residual surface resistivity in Nb and Nb-alloys thin film coated r.f. cavities. The effect of the film thickness on the surface impedance is also discussed.

引用

页码：1920 / 1923

页数：4