Title :
Variable CW RF power coupler for 345 MHz superconducting cavities
Author :
Shepard, K.W. ; Conway, Z.A. ; Fuerst, J.D. ; Kelly, M.P. ; Waldschmidt, G.J. ; Porcellato, A.M.
Author_Institution :
ANL, Argonne
Abstract :
This paper reports the development of a CW variable coupler for 345 MHz spoke-loaded superconducting (SC) cavities. The coupler inserts an 80 K copper loop into a 5 cm (2 inch) interior diameter coupling port on several types of spoke-loaded cavity operating at 2 K or 4 K. The coupling loop can be moved during operation to vary the coupling over a range of 50 dB. The coupler is designed to facilitate high-pressure water rinsing and low-particulate clean assembly. Design details and operating characteristics are discussed.
Keywords :
superconducting devices; copper loop; frequency 345 MHz; high-pressure water rinsing; size 5 cm; spoke-loaded superconducting cavities; temperature 80 K; variable CW RF power coupler; Assembly; Bellows; Ceramics; Coaxial components; Conductors; Copper; Couplings; Radio frequency; Superconducting transition temperature; Superconducting transmission lines;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441206
