Design of a high power 140 GHz gyrotron oscillator operating in an asymmetric volume mode at KfK

G. Gantenbein

doi:10.1117/12.2297846

1 October 1991 Design of a high power 140 GHz gyrotron oscillator operating in an asymmetric volume mode at KfK

G. Gantenbein

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15763P (1991) https://doi.org/10.1117/12.2297846
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

Future plasma heating experiments using electron cyclotron waves call for gyrotrons capable of delivering output powers at the 0.5 - 1.0 MW level at frequencies around 140 GHz. To reduce the ohmic losses (in the cavity wall) at such high output powers to manageable values and to reduce the mode competition problem, a highly overmoded resonator is required to operate the tube in an asymmetric mode. As a planned step towards a 1 MW tube, following the TE_10,4 experiments [1], a gyrotron working in a TE_22,n mode (with n=4,5,6) with an internal quasi-optical mode converter will be considered (see Fig. 1). Results of Russian experiments indicate that these modes are promising candidates for 1 MW cw operation [2, 3].

Citation Download Citation

G. Gantenbein "Design of a high power 140 GHz gyrotron oscillator operating in an asymmetric volume mode at KfK", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15763P (1 October 1991); https://doi.org/10.1117/12.2297846

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