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.
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Lawson et al. (1998) studied this question.
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