Abstract
The phase stability of a 140 GHz, 1 kW pulsed gyro-amplifier system was measured and found to be stable both pulse-to-pulse and during each pulse. The gyro-amplifier has been developed at MIT for pulsed Dynamic Nuclear Polarization Nuclear Magnetic Resonance (DNP-NMR) spectroscopy1. It uses a confocal geometry to achieve an overmoded interaction circuit with reduced mode competition and is designed to operate without severs. The confocal gyro-amplifier demonstrated a peak circuit gain of 35 dB, a bandwidth of 1.2 GHz, and a peak output power of 550 W at 140.0 GHz.
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