Analysis and simulation of a magnicon output cavity

Summary form only given, as follows. The electron-wave interaction in the output cavity of a frequency-doubling, magnetic-field-immersed magnicon amplifier has been analyzed. The electrons interact with a rotating TM/sub 210/ mode via a gyroresonant mechanism. Single-electron, steady-state simulation of reduced and scaled equations of motion and Maxwell equations has been used to rapidly scan the parameter space and locate a desirable operating point. A single-electron, time-dependent code was then employed to ensure that the chosen final state is an accessible and stable operating point of an amplifier in which the RF grows from noise. Finally, a multielectron, steady-state code was used to study the sensitivity of the point design to spread in electron beam radius, energy, and transverse momentum. Design parameters for a high-efficiency magnicon operating in the X-band have been determined.