Lifetime experience with low temperature cathodes equipped in super power klystrons

Author

Bachmor, Rudolf

Author_Institution

Philips GmbH, Hamburg, Germany

Volume

3

fYear

1995

fDate

1-5 May 1995

Firstpage

1550

Abstract

When Philips started the production of super power klystrons in 1976 the electron emitter was a tungsten dispenser cathode of the well-known Philips “B” type. One disadvantage of this cathode type is the relative high cathode temperature. Many efforts have been spent from researchers world-wide to decrease the operating temperature of the dispenser cathode. Since 1990 we have tested several sputter coated Os/Ru cathodes in cw super power klystrons. The expected decrease of the temperature has been entirely confirmed. Measured emission data compared to “B” cathodes during factory acceptance test are presented. Positive experience concerning lifetime under real operation conditions has been gained at different international accelerator centers and will be reported

Keywords

accelerator RF systems; cathodes; electron emission; klystrons; life testing; power supplies to apparatus; Os-Ru; dispenser cathode; electron emitter; emission data; factory acceptance test; lifetime experience; low temperature cathodes; sputter coated Os/Ru cathodes; super power klystrons; Assembly; Barium; Cathodes; Coatings; Electron emission; Klystrons; Optical surface waves; Production; Temperature; Tungsten;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505282

Filename

505282