Development and Initial Experimental Results of a Terahertz Pulsed Field Gyrotron in the WHMFC

We report the design and initial experimental results of an 800-GHz second harmonic gyrotron prototype, in which a 15-T pulsed magnet is applied. This gyrotron prototype is developed at the Wuhan National High Magnetic Field Center (WHMFC). An in-house software for analyzing and designing terahertz gyrotrons and an experimental research platform are developed. In addition, alignment adjustments, eddy current effects, and radiation tests are discussed. The initial experimental results show that the prototype gyrotron can irradiate ~40 W at fundamental harmonic 383.7-GHz (TE _1,4 ) waves at 14.14 T and a few milliwatts at second harmonic 0.8-THz (TE _8,5 ) waves at 14.86 T.