Relativistic Vacuum Diode for Focusing of Electron Beam

摘要

A relativistic vacuum diode (RVD) for extreme focusing of an electron beam is provided. The RVD may include an axisymmetric current-conducting vacuum chamber equipped with a demountable hatch for access into its cavity; an axisymmetric electrode assembly fixed in operative position in the central zone of the vacuum chamber. It additionally includes a plasma cathode composed of a thin central current-conducting rod and wide dielectric end element, and anode-enhancer shaped as a rod, one butt-end of which serves as a target for an electron beam. The target cross-section area is smaller, than the emitting area of said cathode's wide dielectric end element. Finally, a short-circuiter of reverse current is included in an earthed circuit of the anode-enhancer that surrounds said electrode assembly concentrically with radial clearance.