A second-harmonic TE21 gyro-TWT which is predicted by a self-consistent nonlinear simulation code to produce an output power of 400 kW, efficiency of 20 % and con- stant drive bandwidth of 6 % is described. A single anode 100 kV, 20 A MIG is being built to generate the a = 1 electron beam with Avz /vz = 8%.
Q. S. Wang, Q. S. Wang,
"Single stage high power second harmonic gyro-twt", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 19295G (14 December 1992); doi: 10.1117/12.2298313; https://doi.org/10.1117/12.2298313