Harmonic emission from high-power high-frequency gyrotrons
| Autor: | Richard J. Temkin, P. Woskoboinikow, K.E. Kreischer, B.G. Danly, W. J. Mulligan, J. L. Byerly |
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| Rok vydání: | 1984 |
| Předmět: | |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1362-3060 0020-7217 |
| DOI: | 10.1080/00207218408938983 |
| Popis: | The results of a study of second-harmonic emission from a gyrotron designed for high-power high-frequency operation at the fundamental of the cyclotron frequency are presented. Stable, very narrow bandwidth second-harmonic cavity emission from 209 GHz to 302 GHz has been observed. An output power of 25 kW and efficiency of 6·5% in the TE11, 2, 1, mode at 241 GHz is reported; this represents the highest power obtained to date from a high-frequency (> 100 GHz) harmonic gyrotron. These experiments have been carried out in a cavity for which the mode density is very high; the cavity diameter is approximately six free-space wavelengths for emission at the second harmonic. Mode competition between fundamental and second-harmonic modes is discussed. It is also shown that, in general, gyrotrons designed for high-power low-Q operation in overmoded cavities at the fundamental will also have high efficiencies and strong emission in second-harmonic modes. Prospects for high-frequency harmonic gyrotrons for p... |
| Databáze: | OpenAIRE |
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