A non-adiabatic electron gun has been designed for a 35 GHz, 100 kW gyrotron. A 50 kV, 10 A laminarelectron beam has been achieved with a perpendicular to parallel velocity ratio of 1.9 for a perpendicularvelocity spread as low as 0.4% (optics and space charge). Extensive numerical parameter studies have beenperformed to investigate the constraints and performance of the gun.
J. J. Barraso, J. J. Barraso,
"Non-adiabatic electron guns for gyrotrons", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21046G (30 August 1993); doi: 10.1117/12.2298664; https://doi.org/10.1117/12.2298664