High-repetition-rate ferroelectric-cathode gyrotron

Einat, M.; Jerby, E.; Rosenman, G.
December 2001
Applied Physics Letters;12/17/2001, Vol. 79 Issue 25, p4097
Academic Journal
The intensive research on ferroelectric electron-emission mechanisms in the last decade has resulted in a wide understanding of the physics and characteristics of this plasma-assisted electron source. Nevertheless, practical devices employing this cathode were hardly introduced. In this experimental study, a high-repetition-rate microwave oscillator based on a ferroelectric electron gun has been developed. The device operates as a cyclotron-resonance maser in the gyrotron mode. Microwave pulses exceeding 1.5 kW at ∼7 GHz are measured in repetition rates above 3 MHz and duty cycles of ∼50%. These experimental results encourage the implementation of ferroelectric cathodes in practical high-power microwave tubes. © 2001 American Institute of Physics. [DOI: 10.1063/1.1426262].


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