Effects of space charge on the performance of an orotron

Abstract
We consider the effects of mutual electronic repulsion in the electron beam in the orontron, based on the general analysis of Gover and Strangle [IEEE J. Quantum Electron. QE-17, 1196 (1981)]. The theory of orotron operation is extended to include space charge effects, and calculations are in good agreement with available experimental results at low (∼6.7 A/cm2) beam current densities. The theory predicts than an output power of 264 W cw may be obtainable at 75 GHz with a beam current density of 50 A/cm2.