DocumentCode :
2132741
Title :
High-power input coupler with a cylindrical alumina window
Author :
Akemoto, Mitsuo
Author_Institution :
KEK, Nat. Lab. for High Energy Phys., Ibaraki, Japan
fYear :
1991
fDate :
6-9 May 1991
Firstpage :
1037
Abstract :
A high-power RF-input coupler has been installed in the TRISTAN alternating periodic structure cavity operating at 508 MHz. The structure, high power characteristics and long term performance of the coupler are described. It has a cylindrical alumina window coated with TiN of 60-AA thickness and feeds a power of 225 kW (CW) to the cavity. In an early stage of development, the multipactoring discharge of the window was a primary problem. After the coating, the window discharge was not observed. A total of 112 couplers has been installed in the TRISTAN ring and successfully operated for about 17000 h since the spring of 1985. The most serious trouble with the operation was a failure of the loop. This problem was discovered after about 5000 h of operation. Improvements to the coupler including the loop have been made.<>
Keywords :
electron accelerators; storage rings; CW; TRISTAN alternating periodic structure cavity; TiN; cylindrical alumina window; high power characteristics; high-power RF-input coupler; long term performance; multipactoring discharge; window discharge; Acceleration; Ceramics; Coaxial components; Conductors; Couplings; Feeds; Periodic structures; Radio frequency; Springs; Thermal conductivity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
Type :
conf
DOI :
10.1109/PAC.1991.164529
Filename :
164529
Link To Document :
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