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Showing papers on "Marx generator published in 1971"


Patent
16 Feb 1971
TL;DR: In this article, a working Marx generator consisting of a stacked plurality of chargeable capacitors and normally open switches between successive capacitors, and a second Marx generator, having a rapid self-erection rate, for triggering the closing of at least some of the switches at a rate substantially faster than the compact generator self-reaction rate, necessarily slow because of its large interstage stray capacitance resulting from its compactness.
Abstract: A compact working Marx generator consisting of a stacked plurality of chargeable capacitors and normally open switches between successive capacitors, and a second Marx generator, having a rapid self-erection rate, for triggering the closing of at least some of the switches at a rate substantially faster than the compact generator self-erection rate, necessarily slow because of its large interstage stray capacitance resulting from its compactness. The illustrated switches are spark gaps, each having a third electrode between its two principal electrodes, and the switches are closed by pulses fed thereto from successive stages of the triggering generator through isolating means such as inductors to minimize any effect of the firing of the switches on the erection of the triggering generator. One or more additional working generators may be paralleled with the first working generator, both as to their switch closing circuitries and their outputs. Because triggering of the working generator does not directly depend on the voltage of its capacitors, its output voltage may be varied over a wide range.

61 citations


Journal ArticleDOI
TL;DR: A 250 - 400 kV, 80 kA, 30 ns electron beam generator has been developed in this paper, which consists of a 600 kV Marx generator, a water-dielectric transmission line, a diode, and a beam drift chamber.
Abstract: A 250 - 400 kV, 80 kA, 30 ns electron beam generator has been developed. The machine consists of a 600 kV Marx generator, a water-dielectric transmission line, a diode, and a beam drift chamber. It was necessary to minimize prepulse for stable diode operation. Several cathodes were tested during development and results are reported. Diodes with 26 and 8 nH inductance are described.

27 citations


Journal ArticleDOI
TL;DR: In this paper, single and double-channel laser triggered switches in high pressure gas have been designed and operated in the voltage range from 1 to more than 3 MV with subnanosecond jitter.
Abstract: Single‐ and double‐channel laser triggered switches in high pressure gas have been designed and operated in the voltage range from 1 to more than 3 MV. Jitter times of <1 to 3 nsec were observed in most cases. Gas pressures of 10.5 and 21 kg·cm−2 were used. The gases were either 100% nitrogen or various mixtures of N2, SF6, and Ar. Significant accomplishments were (1) the simultaneous firing of four stages of a Marx generator by an optically divided laser beam, (2) up to 40% reduction in the risetime observed in the output pulse from a multimegavolt dc generator when switched into a load through two simultaneously laser triggered channels, and (3) the design and operation of a laser triggered, dc charged switch at more than 3 MV with subnanosecond jitter.

13 citations


Journal ArticleDOI
TL;DR: In this article, a command trigger pulse firing this trigger generator penetrates the outer and inner members of the transition line through an interface unit, and four closely coupled trigatron type gas/plasma switches are triggered simultaneously by a trigger generator mounted within a transition line.
Abstract: Two separated coaxial pulse-forming lines of 1.5 ohms impedance are simultaneously switched into 1.5 ohm coaxial transition lines in a water environment producing 70 ns duration, 20 ns risetime, 1 MV pulses into a common load. The pulse-forming lines are pulse-charged to voltages up to 2 MV in a time of about 0.5 ?s from a common Marx generator. Feasibility of the command trigger design has been demonstrated on a single 1.5 ohm coaxial line system. Four closely coupled trigatron type gas/plasma switches are triggered simultaneously by a trigger generator mounted within the transition line. The command trigger pulse firing this trigger generator penetrates the outer and inner members of the transition line through an interface unit. The characteristics of the trigatrons, the trigger generators and the interface units will be described.

4 citations


Journal ArticleDOI
TL;DR: In this article, a Q-switched ruby laser was used to initiate breakdown in solid dielectric switches with a jitter of less than 3 ns, and a test system employing a miniature Marx generator and a high energy system switching 150 kA at 400 kV to form precisely timed relativistic electron beams was described.
Abstract: A Q-switched ruby laser was used to initiate breakdown in solid dielectric switches with a jitter of less than 3 ns. "Lexan" polycarbonate in thickness from 40 to 80 mils withstood applied voltage pulses (less than 1 ?s duration) of up to 400 kV. Laser pulse energy of less than 1 joule was sufficient to initiate breakdown in the solid dielectric. A focusing lens and the switch container were immersed in a grading solution of copper sulfate and water. Command triggering down to 50% of the dielectric's self break voltage was demonstrated. A test system employing a miniature Marx generator, and a high energy system switching 150 kA at 400 kV to form precisely timed relativistic electron beams, are described.

2 citations