ANGULAR VELOCITY SPREAD OF RELATIVISTIC ELECTRON-BEAM GENERATED BY HIGH-CURRENT DIODE

Theoretical analysis and numerical simulations of the Relativistic Ele ctron Beam (REB) generation in a high current diode immersed in an ext ernal magnetic field has been done. The calculations have confirmed th at the generated beam is homogeneous and monoenergetic in a broad cent ral region. In the case of cylindrical diode the mixing of electron tr ajectories has been observed only in a narrow periphery beam region. T he angle between particle trajectories and external longitudinal magne tic field varies chaotically from 0-degree to -25-degrees. This phenom enon suppresses the excitation of two stream instability excited by th e REB in the plasma column.