Theoretical study of stability for relativistic planar magnetron

Summary Form only given, as follows. Linear stability properties of a sheared relativistic electron flow in a planar magnetron have been investigated. The stability analysis of the extraordinary mode perturbations has been carried out within the framework of a linearized macroscopic fluid model. For the special case of a tenuous beam, an algebraic dispersion relation for the dicotron instability has been obtained and solved numerically for the parameters of interest. Particle simulation using a two-dimensional, electromagnetic, relativistic particle-in-cell code was also carried out to demonstrate the dicotron perturbation. The dicotron instability in a planar diode geometry has been simulated with an assumption of flow density described by a flat value of n/sub b/(x)/ gamma /sub b/(x) inside the anode-cathode gap.<>