HIGH-POWER OPERATION OF A 3-CAVITY X-BAND COAXIAL GYROKLYSTRON

Experimental studies of high-power amplification in a novel three-cavi ty X-band gyroklystron are reported. The electron gun produces a 520 A beam of 470 keV electrons. The voltage flat top is nearly 2 mu s and the beam's average velocity ratio is about 1. All cavities are designe d 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 capabili ty of pulsed X-band gyroklystrons.