DEVICE AND METHOD FOR ELECTRON BEAM EMISSION Russian patent published in 2003 - IPC

FIELD: emitting electron beams for extracting polluting components from stack gas. SUBSTANCE: device has electron beam emission source, acceleration tube for accelerating electrons emitted from mentioned electron emitting source, focusing electromagnet for superimposing magnetic field onto high-energy electron beam produced by means of acceleration tube to control diameter (sectional area) of electron beam, and electromagnet for deflecting and sweeping adjustable-diameter electron beam by superimposing magnetic field onto electron beam, electric current component I_F, of this magnetic field being synchronized with electric current I_S of focusing electromagnet electric current I_F superimposing of focusing electromagnet, with the result that focusing electromagnet current I_F is adjusted so as to ensure that mentioned diameter (sectional area) of electron beam were at maximum in sweep maximum points. EFFECT: provision for eliminating problem of electron beam convergence at beam maximum sweep points and for obtaining emission zone with constant energy density. 4 cl, 7 dwg