Controlled discharge on dielectric surface

The paper proposes technique for controlled commutation of energy on a dielectric surface when affected by ultraviolet radiation, formed during electric explosion of wires. Commutation characteristic of discharge can be controlled by changing intensity of surface irradiation and number of commutation channels by changing number of exploded wires. This technique, combined with other factors, is used for formation of trailing of voltage (current) at accelerating tube of direct action accelerator IGUR-3. Exploded wires are placed inside polyethylene pipes 7 m long. With simultaneous changes of electrical field strength along the length of the pipe, steepness of rise of voltage pulse, and intensity of ultraviolet radiation, duration of the trailing edge the pulse can be set from 20 ns up to 250 ns. Speed of discharge on the pipe's surface does not depend upon its length and is, respectively, 3/spl middot/10/sub 8/...3/spl middot/10/sup 7/ m/s.