NONQUADRATIC RF LOSSES IN NIOBIUM SPUTTER COATED ACCELERATING STRUCTURES

被引：10

作者：

DURAND, C

WEINGARTEN, W

BOSLAND, P

MAYER, J

SACLAY, CE

机构：

[1] CTR ETUD SACLAY, F-91191 GIF SUR YVETTE, FRANCE

[2] MAX PLANCK INST MET RES, D-70174 STUTTGART, GERMANY

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.402745

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：

Low field Q-values of more than 10(10) and maximum accelerating gradients E(a) between 10 and 15 MV/m have been obtained in superconducting mono-cell and multi-cell accelerating cavities between 350 and 1500 MHz. The superconductor is niobium, which is magnetron-sputtered as a thin film (similar to 1 - 2 mu m) on a cavity made from copper sheet. The dependence of the slope of Q vs. E(a) on temperature and frequency can be explained by RF magnetic flux trapped within intrinsic defects.

引用

页码：1107 / 1110

页数：4

共 41 条

[1] COMPARATIVE MEASUREMENTS ON NIOBIUM SHEET AND SPUTTER COATED CAVITIES [J].