Theory of the Reflex Resnatron

A qualitative and quantitative description is given of the interaction phenomena between density-modulated groups of electrons and a field which permits them to cross the gap of a resonant cavity twice. Based on the method of Lagrangian parameters, resonance conditions of transit time and field parameters are derived for maximum energy transfer. The theory is extended to account for the specific behavior of the reflex resnatron in terms of efficiency, amplitude modulation, and bandwidth. The results are compared with experiment.