Phase Stability of Locked Gyrotrons

Phase measurements between a master oscillator and its slave gyroklystron have been made. The pulsed gyroklystron was operated both as an amplifier and as a phase triggered oscillator. As an amplifier, the phase jitter during the 3 ¿s pulse was 20°; from pulse-to-pulse the jitter was 0.86°. As a phase triggered oscillator the jitter of the firing point from shot-to-shot was < 7° even at input-to-output power ratios as large as 52 dB. The significance of these results for linear accelerator applications Is discussed.