DEVICE FOR RADIATING CHARGED PARTICLES, CHARGED-PARTICLE RADIATOR, WELDING APPARATUS, CHARGED-PARTICLE PASSING UNIT, AND DEVICE FOR PRODUCING CHARGED-BEAM Russian patent published in 2003 - IPC

FIELD: electron guns. SUBSTANCE: device for radiating charged particles has unipolar charged-particle radiator 5. Tubular screen electrode 6 encloses radiator over periphery and is maintained during operation at same polarity as charged particles. Tubular accelerating electrode 7 is mainly disposed coaxially with respect to tubular screen electrode 6 and during operation its polarity is reverse to that of tubular screen electrode. Device functions so that charged particles escaping radiator 5 are first blurred in sideways direction outwards and then they are focused in beam 8 which is passed through tubular accelerating electrode 7. EFFECT: enhanced convergent angle of electron gun providing for resistance to spatial charge blurring at high currents. 35 cl, 29 dwg