500 kw operation of a 140 gliz gyrotron: experiment and simulation

G. Gantenbein

doi:10.1117/12.2298211

14 December 1992 500 kw operation of a 140 gliz gyrotron: experiment and simulation

G. Gantenbein

Proceedings Volume 1929, 17th International Conference on Infrared and Millimeter Waves; 19292M (1992) https://doi.org/10.1117/12.2298211
Event: 17th International Conference on Infrared and Millimeter Waves, 1992, Pasadena, CA, United States

Abstract

At KfK a gyrotron operating in the mode TE10,4 at 140 GHz has been constructed and is now under test [1]. One of the goals of this experiment is to generate an RF output power of at least 500 kW. The choice of the high order working mode was taken with respect to reduction of ohmic losses in the resonator walls and to mode competition. At higher order modes the frequency spectrum becomes more dense and mode competition is a more serious problem. Conse- quently in this experiment stable single mode operation should be demonstrated and the factors limiting these goals should be identified. The electron gun is a triode type MIG, a nonlinear uptaper is used to increase the waveguide diameter to the window diameter (70 mm), the vacuum tube is sealed with a double disc A/203 (single crystal sapphire) window whose spacing is adjustable or with a single disc window (sapphire or fused silica). The gyrotron has been pulsed with 0.3 ms pulse length and a repetition rate of 1 Hz.

Citation Download Citation

G. Gantenbein "500 kw operation of a 140 gliz gyrotron: experiment and simulation", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 19292M (14 December 1992); https://doi.org/10.1117/12.2298211

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