3-D Particle Trajectory Tracking and Characterization of Electron Beam Parameters of High Power Electron Gun

Abstract

In this paper, a high power indirectly heated cathode based strip electron gun (60kW, 60kV, 1A) has been successfully modeled and characterized for melting and evaporation applications in high voltage electrical engineering. Key advantages of using electron beam as a heat source are that it can be used for melting refractory materials where conventional heating techniques fail, melt pool can be superheated owing to high power density of electron beam $(\sim 10^{5} W/cm^{2})$, flexibility for material processing of assorted grade of reactive metals and alloys. In this paper, characterization of electron beam parameters has been carried out in order to measure the beam size and emittance. 3D simulations are carried out for electron gun design, modelling and electron beam trajectory tracking by using CST Studio Particle Tracking Module. Electrostatic and electromagnetic focusing has been employed for required beam focusing and deflection. Trial experiments were carried out in order to validate the simulation results. The simulation and experimental results show good correspondence.