UC Davis 94 GHz gyrotron traveling-wave amplifier developments

Summary form only given. During the past year, record performance has been obtained at W-band from the UCD TE01 proof-of-principle gyro-TWT: 75 kW output, 45 dB gain, 22.5% efficiency, and 3.7% saturated bandwidth (BW) at 93.5 GHz. In this talk, we report the design and fabrication of a new follow-on ultra high gain (71 dB) gyro-TWT producing 110 kW output at 5% BW with the focus on advanced millimeter wave radars.