Angular Divergence of Electrons in Generating Two Ribbon Beams in a Single Accelerating Diode (Simulation, Experiment)

Abstract

The paper presents the results of numerical simulation and experimental studies of the generation of two ribbon beams in an accelerating diode with magnetic insulation at a diode voltage of ~ 0.7 MeV and a current of 10 kA in it. Modeling is implemented using the Particle CST Studio package. The experiments were conducted on the U-3 accelerator of the ELMI installation. In calculations with three-dimensional geometry corresponding to the experiments, the distribution of electron velocities over the pitch angle at the exit of the beams from the diode under the conditions of an inhomogeneous magnetic field with an induction of about 1 T was obtained. These calculated data were confirmed in an experiment in which, using a sensor with seven recording channels, a distribution function of the velocity of electrons with a characteristic width at half maximum of 0.03 rad was obtained. Using the GEANT4 software package in processing measurement results with this sensor gives confidence in the correctness of the obtained distribution function.