The dynamics of generation of high current rela tivistic electron beams in coaxial magnetically-insulated vacuum diodes

The paper presents the results of both experimental and numerical (2D steady-state and 2D, 3D time-dependent PIC-codes) investigation of generation of high current moderately relativistic electron beams (500 keV, 5 kA, 20 ns) in a vacuum coaxial MID´s within the full space charge regime. Explosive emission edge cathodes have been used in the experiment. Conclusions are drawn how the beam generation is effected by: - both the explosive emission expansion and the cathode plasma flying apart; - vibrations of the electron flow self space charge within the crossed fields near the cathode surface.