Patent Number: 043812805
Section: claims

1. A trigger device for directing electron beam pulses toward a target comprising: an electron accelerator having a cathode for emitting electrons and an accelerating electrode having plural openings therein through which electrons exit said accelerator, said cathode being a multi-element cathode having a plurality of separate emitting portions for simultaneously generating separate electron beam pulses from a common source, said emitting portions being positioned adjacent respective openings, in said accelerating electrode for directing electrons from an emitting portion through a particular electrode opening, a plurality of curved dielectric linear pinch discharge tubes of equal length for directing the separate electron beam pulses to the target from different directions for symmetrically and simultaneously irradiating the target uniformly, each tube having a first end adjacent said accelerating electrode for receiving electrons therein from only one of said cathode emitting portions, a second end adjacent said target, and being filled with a plasma producing medium for providing electron transport through said tube. 2. A trigger device as set forth in claim 1 and further comprising a plurality of electrical conductors disposed along the length of each dielectric tube for developing a composite magnetic field within said tube and thereby controlling the position of electron beam transporting plasma within the tube. 3. A trigger device as set forth in claim 2 wherein said plurality of electrical conductors are disposed symmetrically around straight portions of said tubes and non-symmetrically around curved portion of said tubes for maintaining plasma flow away from the tube inner surfaces and toward the center of the tubes. 4. A trigger device as set forth in claim 3 wherein said plurality of electrical conductors are at least eight conductors and said non-symmetrically arranged portions of conductors are disposed to develop a stronger magnetic field on the outer radius of said curved tube portion than on the inner radius to effect bending of said electron beam and plasma within the tubes. 5. A trigger device as set forth in claim 4 wherein said plurality of tubes are four tubes, with respective first and second pair of said tubes each having the second end of said pair in coaxial alignment with each other and with said target therebetween for uniformily irradiating said target. 6. A trigger device as set forth in claim 4 wherein said plurality of dielectric tubes are 2 tubes, said tubes being disposed with the second ends thereof coaxially positioned for simultaneously irradiating said target from opposite directions, and means holding said target for developing a magnetic field parallel with the target axis for retarding heat loss in the radial direction and enhancing one-dimensional expansion in the direction of irradiation.