Erection of Compact Marx Generators

Pouncey, J. Cameron; Lehr, J.M.; Giri, D. V.

doi:10.1109/tps.2019.2915034

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…The fall time constant of the voltage impulse must be long enough to guarantee the closing of the switch in the next stage of the generator since it determines the overvoltage time on the gap electrodes. The overvoltage time on SGSs is important for its stable operation due to the statistical and formative delays associated with the gas breakdown process [24]. The fall time constant can be raised by increasing the self-inductance values of the charging and discharging inductors.…”

Section: Columns Of Inductorsmentioning

confidence: 99%

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Zhabin

Lavrinovich

Ferron

et al. 2022

IEEE Trans. Plasma Sci.

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This article presents the electrical and mechanical design of a compact 13-stage 0.5-MV Marx generator operating at a pulse repetition frequency (PRF) of 100 Hz. The fast-switching process of the generator is based on spark gaps, operated under pressurized air and leading to the generation of an output pulsed voltage with a peak of 0.5 MV and a rise time of 15 ns when operated on a 300-load. Corona-stabilized electrodes are installed near the main gap of the switches to improve their operational stability and increase the PRF. To ensure compactness, the Marx generator is housed in a cylindrical metal vessel with a height of 92 cm and an outer diameter of 34 cm, having a total volume of 74 L. A highly accurate simulation using both PSpice and CST software packages was used to predict the impulse waveform at the output of the generator and to help in optimizing the generator design. The tests show a good agreement between the experimental data and the theoretical predictions.

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Section: Columns Of Inductorsmentioning

confidence: 99%

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Zhabin

Lavrinovich

Ferron

et al. 2022

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…The ultra-fast rising-edge of the pulse is mainly determined by the transistor's avalanche effect. The circuit's structure has been changed from the gap discharge structure to the stable avalanche transistor Marx circuit structure [15][16][17][18], and the pulse width control has been possible from microsecond, nanosecond to sub nanosecond. After solving the pulse width problem, the next question is how to reduce the pulse width while increasing the pulse source's output.…”

Section: Introductionmentioning

confidence: 99%

Development of a High Peak Voltage Picoseconds Avalanche Transistor Based Marx Bank Circuit

Liu

et al. 2021

IEEE Access

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Avalanche transistor-based Marx bank circuit (MBC) is widely used to generate high voltage nanosecond pulses with high amplitude, high repetition rate, fast rise time, and low jitter. Researchers have tried to modify the circuit structure by using parallel or series avalanche transistors to increase peak power. However, in this work, the detailed process of analyzing and designing a compact Marx generator using avalanche transistors will be described. The purpose of this article is to report our experimental observations on the mechanism of operation of the MBCs. By studying the influence of amplitude and pulse width of the trigger circuit, a Gaussian pulse with a rising edge of 160 ps, full width at half maximum (FWHM) of 660 ps, and amplitude of 5000 V are obtained. The design improves the output voltage and pulse repetition frequency (PRF) effectively while reducing the use of the number of transistors. Based on the conventional principles of avalanche transistors and Marx circuit, a list of useful and interesting conclusions obtained from experiments will be reported.

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“…The traditional pulses generator mainly includes Marx generators [19], [20], linear transformer driving source (LTD) [21], [22], and so on. At present, some pulse generators use the Marx structure.…”

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confidence: 99%

A Solid-State Pulse Adder for High-Voltage Short Pulses and Low-Voltage Long Pulses

Jiang

Zhang

Wang

et al. 2022

IEEE Trans. Plasma Sci.

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The synergistic effect of high-voltage short pulses and low-voltage long pulse on cell electroporation can expand the tissue ablation area and enhance the irreversible electroporation effect. To meet the requirements of electroporation for pulse waveform, this article proposes a pulse generator which can output high-voltage short pulses and low-voltage long pulses cooperatively. The generator only uses one resonant power supply and uses magnetic rings with separate windings to control different charging voltages. The structure is relatively simple, and the output waveform can meet the experimental requirements. Finally, a prototype is built, in which the main circuit includes 14 switch tubes and 14 spring mud capacitors. The whole system can generate high-voltage short pulses with amplitude of 0-3 kV, a pulsewidth of 1-4 µs, and low-voltage long pulses with amplitude of 0-1 kV, a pulsewidth of 30-150 µs. The delay between high voltage pulses and low voltage pulses is adjustable. At the same time through the control of driving timing, a seven-level step wave with amplitude of 2 kV can be generated. Index Terms-Electroporation, high-voltage short pulses and low-voltage long pulses, pulse generator, step wave. I. INTRODUCTION E LECTROPORATION technology has a wide range of applications in biomedicine, such as electrochemotherapy [1], [2], food sterilization [3], [4], water treatment [5], cell electrofusion [6]. Cell electroporation is divided into reversible electroporation and irreversible electroporation.Reversible electroporation means that when a microsecond pulsed electric field is applied to the cells, the cell membrane permeability will increase instantaneously [7], [8], [9]. When the pulsed electric field is stopped, the cell membrane permeability will gradually recover, and the cell function will Manuscript

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Erection of Compact Marx Generators

Cited by 7 publications

References 9 publications

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Development of a High Peak Voltage Picoseconds Avalanche Transistor Based Marx Bank Circuit

A Solid-State Pulse Adder for High-Voltage Short Pulses and Low-Voltage Long Pulses

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