Improved Magnetron Injection Guns for Gyrotrons

Recent gyrotron operations indicate that nonuniform cathode emission is prevalent in many, if not most, magnetron injection guns. A nonuniform emission can result in degradation of the RF performance and increase heating in the collector. This paper describes research to improve cathode emission by...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2008-06, Vol.36 (3), p.620-630
Main Authors: Ives, R.L., Borchard, P., Collins, G., Curtis, M., Falce, L.R., Gunther, K., Marsden, D., Miram, G., Wilcox, R.
Format: Article
Language:English
Subjects:
Cathode
Cathodes
Collectors
Electron beams
Electron emission
Electron tubes
Electrons
Emission
emission uniformity
Guns
gyroklystron
gyrotron
Gyrotrons
Heating
Klystrons
magnetron injection gun (MIG)
Nonuniform
Plasma
Plasma temperature
Radio frequency
Temperature
Temperature sensors
Variability
Work functions
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Summary:Recent gyrotron operations indicate that nonuniform cathode emission is prevalent in many, if not most, magnetron injection guns. A nonuniform emission can result in degradation of the RF performance and increase heating in the collector. This paper describes research to improve cathode emission by addressing temperature uniformity and work function issues. A new cathode design is proposed, and a facility for measuring both temperature and emission uniformity is described.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2008.917529