On dynamics of electron beams with extended initial radius in reverse magnetic fields

The dynamics of the electron flux in the reverse magnetic fields by increase in the beam current initial radius and density is studied. These studies are actual for the works on creating the powerful microwave energy transformers. The results of the numerical modeling showed, that the nonuniformity of the magnetic field radial component and the beam spatial charge field noticeably effect the electron flux with increased initial radius in the reverse magnetic field. The simultaneous increase in the current density and the beam initial radius by the reversible area length, proportional to the number of the beam rotations round its axis, makes it possible to transform up to 80-85 % energy of the electron cyclotron rotation into the direct electric current energy