A 250 GHz photonic band gap gyrotron traveling wave amplifier

摘要

A 250 GHz gyrotron traveling wave tube (gyro-TWT) for nanosecond pulse amplification with 1 kW peak power and gain exceeding 50 dB has been designed and is under construction. The amplifier uses a novel photonic band gap (PBG) interaction circuit that confines a TE03-like mode while providing lower-order mode suppression. Cold test results for the transmission line, input coupler, PBG waveguide and mode converter are presented. A triode electron gun designed for this amplifier has been constructed. Ongoing experimental installation and cold test results for the photonic structure will be discussed.