Competition between the fundamental and the second harmonic in quasi-optical gyrotrons

T. M. Tran

doi:10.1117/12.2301540

1 December 1990 Competition between the fundamental and the second harmonic in quasi-optical gyrotrons

T. M. Tran

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15143M (1990) https://doi.org/10.1117/12.2301540
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

In quasi-optical gyrotrons (QOG) using Fabry-Perot resonators designed to operate at the fundamental, the second harmonic interaction could be important due to the fact that the quality factor Q is an increasing function of the frequency. Emissions at frequencies twice the electron cyclotron frequency have been also observed experimentally in QOG as well as in cylindrical gyrotrons. In order to understand the nature of this unwanted emission and its effects on the efficiency of the quasi-optical gyrotrons, a simulation code, based on the slow time scale formalism is written to follow the time evolution of the fundamental as well as the higher harmonic modes. Results from the simulations of our 100 GHz QOG experiment will be presented.

Citation Download Citation

T. M. Tran "Competition between the fundamental and the second harmonic in quasi-optical gyrotrons", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15143M (1 December 1990); https://doi.org/10.1117/12.2301540

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