ELECTRON GUN FOR O-TYPE DEVICE Russian patent published in 1996 - IPC

FIELD: electronic engineering. SUBSTANCE: emitter is made in the form of two or more toroidal emitters 1 and 2 arranges coaxially and isolated by control electrodes 4 and 5. This make-up provides for laminar internal structure of beam during multimode operation of device and low- voltage no-current beam power control. Equation for determining width and average diameter of each toroidal emitter 1 and 2 is given in description of invention. EFFECT: improved intensity of current flow, reduced control voltage, enlarged functional capabilities of electron gun. 4 dwg