Millimeter-Wave Gyroklystron Amplifier Experiment Using a Relativistic Electron Beam.

摘要

A fundamental mode TE(0) sub 111 two-cavity intense-beam gyroklystron amplifier experiment, operating at an accelerating voltage of 1 MV, has demonstrated a linear gain of 19 dB and an unsaturated power of 100 kW. The frequency of the second cavity has been found to track the frequency of the driven cavity over a range of 300 MHz around a center frequency of 35 GHz. Stable amplifier operation was achieved with beam currents as large as 150 A and a velocity pitch ratio of 0.36. The stable operating range was limited by spurious oscillation in the TE(0) sub 112 mode. Theoretical calculations indicate that higher gains might be attainable if this mode could be suppressed. The two cavities which were tested are intended to serve as bunching cavities for a high power output cavity to be tested at a later date. Keywords: Gyrotron; Gyroklystron; Millimeter-wave; Relativistic beam. (jhd)