In the Linear Transformer Driver (LTD) technology, the low inductance energy storage components and switches are directly incorporated into the individual cavities (named stages) to generate a fast output voltage pulse, which is added along a vacuum coaxial line like in an inductive voltage adder. LTD stages with air insulation were recently developed, where air is used both as insulation in a primary side of the stages and as working gas in the LTD spark gap switches. A custom designed unit, referred to as a capacitor block, was developed for use as a main structural element of the transformer stages. The capacitor block incorporates two capacitors GA 35426 (40 nF, 100 kV) and multichannel multigap gas switch. Several modifications of the capacitor blocks were developed and tested on the life time and self breakdown probability. Blocks were tested both as separate units and in an assembly of capacitive module, consisting of five capacitor blocks. This paper presents detailed design of capacitor blocks, description of operation regimes, numerical simulation of electric field in the switches, and test results.
In this paper we present the design and test results of pulse generators based on air-insulated lineartransformer-driver stages that drive a vacuum transmission line. A custom designed unit, referred to as a capacitor block, was developed for use as a main structural element of the transformer stages. It incorporates two capacitors GA 35426 (40 nF, 100 kV) and a multichannel multigap gas switch. Two types of stages were developed: (1) stage LTD-20 with four modules in parallel and five capacitor blocks in each module (in tests of this stage current amplitude up to 850 kA with $140 ns rise time was obtained on a 0:05 load at 100 kV charging voltage); (2) stage LTD-4 with two modules in parallel and two capacitor blocks in each module. Several installations were built on the base of these stages, including a linear transformer, consisting of two identical LTD-20 stages in series, and a high power electron accelerator on the base of LTD-4 stages. The design, tests results, and main problems are presented and discussed in this paper for these installations.
A high-voltage pulse technology is one of effective
techniques for the disintegration and milling of rocks, separation
of ores and synthesized materials, recycling of building and
elastoplastic materials. We present here the design and test results
of two portable HV pulsed generators, designed for materials
fragmentation, though some other technological applications are
possible as well. Generator #1 consists of low voltage block, high
voltage transformer, high voltage capacitive storage block, two
electrode gas switch, fragmentation chamber and control system
block. Technical characteristics of the #1 generator: stored
energy in HV capacitors can be varied from 50 to 1000 J, output
voltage up to 300 kV, voltage rise time ∼ 50 ns, typical
operation regime 1000 pulses bursts with a repetitive rate up to
10 Hz.Generator #2 is made on an eight stages Marx scheme with two
capacitors (100 kV–400 nF) per stage, connected in parallel. Two
electrode spark gap switches, operated in atmospheric air, are used
in the Marx generator. Parameters of the generator: stored energy
in capacitors 2÷8 kJ, amplitude of the output voltage
200÷400 kV, voltage rise time on a load 50÷100 ns,
repetitive rate up to 0.5 Hz. The fragmentation process can be
controlled within a wide range of parameters for both generators.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.