Analysis of Injected Electron Beam Propagation in a Planar Crossed-Field Gap

This paper examines basic crossed-field device physics in a planar configuration, specifically electron beam perturbation and instability as function of variation magnetic field, angle between electric field. We perform three-dimensional (3-D) simulation system using the full 3-D particle trajectory solver CST Particle Studio (CST-PS). The structure has length, height, width anode-sole gap 15 cm, 2 10 respectively. anode to sole voltage is fixed at 3 kV, field injected current varied from 0.01 T 0.05 1.5 mA 1 A, simulations show that applying makes stable for critical density 94 mA/cm2 an 20 mm. Above this density, was unstable, predicted. Introducing 1° tilt destabilizes 23 mA/cm2, which lower than no tilt, predicted by our theory. results also agree well with prior one-dimensional (1-D) theory predict bands 5° where low (<13.3 mA/cm2), unstable above threshold, then again higher (>33 mA/cm2).