CHARGED PARTICLE PLASMA EMITTER Russian patent published in 2011 - IPC H01J27/02 H01J37/30 

FIELD: physics.

SUBSTANCE: invention can be used in electron and ion sources which generate large cross-section beams. The charged particle plasma emitter has a discharge chamber with an axial hole and a gas inflow channel, a shaper in form of a hollow cylinder, an emission electrode, a ring placed inside the shaper, and voltage source for maintaining potential of the ring independent of the potential of the shaper. The ring is in form of several electrically insulated electrodes formed by dissecting a hollow flattened cone, whose smaller end faces the hole of the discharge chamber, and places symmetrically about the axis of the emitter with possibility of changing the angle of inclination and controlling electric potential of the said electrodes.

EFFECT: high energy efficiency of the plasma emitter when generating beams of charged particles with different form of the cross section using the same emitter and high efficiency of the installation owing to possibility of generating beams not only with current density distribution which is symmetrical about the axis, but with asymmetrical distribution of current density as well without changing the structure of the emitter.

4 cl, 4 dwg