CERN Accelerating science

Article
Title	Results of a High-Power Klystron Dip Test in the KEK Linac
Author(s)	Nakao, Katsumi ; Fukuda, Shigeki ; Katagiri, Hiroaki ; Matsumoto, Toshihiro ; Michizono, Shinichiro ; Takenaka, Tateru ; Yano, Yoshiharu ; Yoshida, Mitsuhiro
Affiliation	(KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3235
Subject category	Accelerators and Storage Rings
Abstract	Dip test, which is the measurement of a klystron heater activity, is recently adopted as the standard measurement to maintain the klystron operation in the KEK electron-positron linac. In 2003, we began to use a dip test as the quick way to measure the emission characteristics from the klystron cathode. After the successful results, we made the dedicated measuring systems and measured the dips of the cathode emission of 60 operating klystrons in KEK electron-positron linac. These data are important to estimate the klystron cathode life and used to select the candidate klystrons of replacement in the summer maintenance period.