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Marx generator

About: Marx generator is a research topic. Over the lifetime, 1276 publications have been published within this topic receiving 8970 citations.


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Journal ArticleDOI
TL;DR: In this article, a microplasma reactor was used for decomposition of formaldehyde (HCHO) for improving indoor air quality, and the removal ratio of HCHO (initial concentration of 0.8 ppm) in the one-pass treatment was 96% at a discharge voltage of 1.3 kV using a highvoltage (HV) amplifier and a Marx generator with MOSFET switches as pulsed-power supplies.
Abstract: Microplasma has advantages of reducing the power and downsizing the entire plasma system. Decomposition of formaldehyde (HCHO) by a microplasma reactor was demonstrated for improving indoor air quality. One experimental investigation used a one-pass treatment (5 L/min), and the second used a large-volume treatment (1500 L/min). The removal ratio of HCHO (initial concentration of 0.8 ppm) in the one-pass treatment was 96% at a discharge voltage of 1.3 kV using a high-voltage (HV) amplifier and a Marx generator with MOSFET switches as pulsed-power supplies. In the case of using the Marx generator, there was no generation. The removal ratio of HCHO (initial concentration of 0.5 ppm) in the large-volume treatment after 60 min was 51% at 1.2 kV when using the HV amplifier and considering 41% natural decay ratio of HCHO. The removal ratio was 54% at 1.2 kV with the Marx generator, and the natural decay ratio was 44% after 60 min of treatment.

27 citations

Journal ArticleDOI
TL;DR: A compact bipolar pulse-forming network (PFN)-Marx generator based on pulse transformers that increased the withstand voltage of the ceramic capacitors in the PFNs and decreased the number of the gas gap switches.
Abstract: A compact bipolar pulse-forming network (PFN)-Marx generator based on pulse transformers is presented in this paper The high-voltage generator consisted of two sets of pulse transformers, 6 stages of PFNs with ceramic capacitors, a switch unit, and a matched load The design is characterized by the bipolar pulse charging scheme and the compact structure of the PFN-Marx The scheme of bipolar charging by pulse transformers increased the withstand voltage of the ceramic capacitors in the PFNs and decreased the number of the gas gap switches The compact structure of the PFN-Marx was aimed at reducing the parasitic inductance in the generator When the charging voltage on the PFNs was 35 kV, the matched resistive load of 48 Ω could deliver a high-voltage pulse with an amplitude of 100 kV The full width at half maximum of the load pulse was 173 ns, and its rise time was less than 15 ns

27 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 article, the authors proposed an auxiliary triggering topology (ATT) for improving the reliability of high-power MBCs based on avalanche transistors, where the auxiliary triggering pulse is generated between the base and emitter of the transistor, and the switching mode is changed from “overvoltage switching-on ” to “triggering switching on.
Abstract: Marx bank circuits (MBCs) based on avalanche transistors are widely used to generate nanosecond pulses with high power, high repetition rate, and low jitter. However, it was observed that avalanche transistors in the first and second stages of traditional M × N -stage MBCs have high failure rates. This paper proposes an auxiliary triggering topology (ATT) for improving the reliability of high-power MBCs based on avalanche transistors. The operation principles of ATT and failure mechanisms of traditional MBCs are analyzed. By adopting ATT, the auxiliary triggering pulse is generated between the base and emitter of the transistor, and the switching mode is changed from “overvoltage switching- on ” to “triggering switching- on . ” The combined effect of overvoltage ramp and auxiliary triggering pulse significantly reduces the failure rate and prolongs the lifetime of easily damaged transistors. Two high-power nanosecond pulse generators, 3 × 12-stage and 6 × 10-stage MBCs adopting ATT, are developed to verify the feasibility of the proposed configuration. The output amplitude and the rising time are 8.5 kV/6 ns and 17 kV/6 ns at the open end of coaxial cable with 75-Ω impedance, respectively. Both generators are tested continuously at the repetition rate of 2 kHz for 60 min and no failure occurs, which shows much better performance in repetition rate and reliability than traditional M × N -stage MBCs.

27 citations

Journal ArticleDOI
TL;DR: In this article, a review and comparison of the circuits in common use to produce the required fast, self-sustained glow discharges in CO2, excimer, and N2 lasers is presented.
Abstract: Pulsed transverse electric (TE) glow discharges used to produce population inversions in gas lasers at 1–20 atm require high‐speed, high‐voltage, high‐current capacitor banks. In this article we first review and compare the circuits in common use to produce the required fast, self‐sustained glow discharges in CO2, excimer, and N2 lasers. The parameters and circuit types given will be useful to future designers of pulsed gas lasers to design and to optimize any proposed circuit in order to yield any desired operating conditions and parameters. The n‐stage circuit types presented are capacitor‐transfer (C‐C), L‐C inversion, Marx bank, and fourfold L‐C inversion, with their double‐sided counterparts, and also their transmission‐line counterparts, such as the Blumlein circuit. A one‐parameter differential equation is developed which describes the general series C‐L‐R circuit. Electrical pulses measured on various lasers are compared with the differential equation solutions for various bank impedances and load...

27 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202322
202255
202132
202033
201951
201845