Phys. Rev. Lett. 81, 3030–3033 (1998)High-Power Operation of a Three-Cavity X-Band Coaxial GyroklystronReceived 22 April 1998; published in the issue dated 5 October 1998 Experimental studies of high-power amplification in a novel three-cavity X-band gyroklystron are reported. The electron gun produces a 520 A beam of 470 keV electrons. The voltage flat top is nearly 2μs and the beam's average velocity ratio is about 1. All cavities are designed to operate in the TE011 coaxial mode near 8.6 GHz. Peak powers of 75–85 MW are measured. The resultant efficiency is near 32% and the gain is near 30 dB. This performance is in good agreement with simulations and represents nearly a threefold increase in the peak power capability of pulsed X-band gyroklystrons. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3030
DOI:
10.1103/PhysRevLett.81.3030
PACS:
84.40.Ik
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