Marx generator

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

1 kHz, 25 kV output, sub-150 ps risetime gas spark gap and antenna

Abstract: A pulse generator and antenna which utilised a high pressure gas sharpening gap is described. The sharpening gap was operated at 1 kHz pulse repetition frequency (PRF) and 25 kV output and good performance was obtained using nitrogen at up to 300 psig without gas flow. Output pulse falltimes of less than 150 ps were recorded. An integral TEM horn antenna utilising Brewster Angle matching techniques is also described. A small Marx generator was also used to pulse charge the gas sharpening gap at 1 Hz PRF to show that the operating range of the spark gap could be extended to higher pressures (600 psig) and 45 kV output whilst preserving the fast risetime.

Development of a repetitive 1-MV, 22-kJ Marx generator

Abstract: A 220-kW Marx generator has been designed, built, and tested. It was developed to drive several different pulse power experimental devices requiring repetitive pulses at voltages to 1 MV and energies to 22 kJ per pulse. Experiments are planned that will explore dielectric performance under repetitive stress, cold cathode diode operation, and repetitive switching with saturable inductors at moderate peak power and voltage. A Marx generator was chosen because it has the versatility to drive such a variety of loads. The Marx generator system is made of 16 inductively isolated capacitor stages resistively charged to a maximum of 62.5 kV per capacitor and eight gas dynamic spark gaps. The charging source is a 2-MW dc bipolar power supply. The gas purging system is capable of supplying 3500 SCFH of air at the required pressure. The first two spark gaps of the Marx generator are triggered with a grounded grid thyratron pulser through a 1:10 step-up transformer with an output peaking gap as an (unused) option. At the maximum output (1 MV, 22 kJ) a repetition rate of 10 Hz is possible. This paper will review some of the development work done on rep rated Marx generators as well as explainmore » the present Marx generator configuration and associated hardware systems.« less

Design and Assembly of a Bipolar Marx Generator Based on Full-Bridge Topology Applied to Electroporation

Abstract: In this work is presented a bipolar Marx Generator (MG) to create pulsed electric fields in electroporation, technique consisting of creating pores on plasma membranes in different medical treatments. The Marx Generator is a voltage multiplier that charges capacitors in parallel and discharges them in series on the output. A new position for the power switches is proposed in order to allow a better control of capacitor individual usage. The main electrical parameters are mentioned and explained how they affect the design of the electroporator. At the end, experimetal tests are performed using vegetable samples as load, to analyze the current response and visual effects of the pulses application.

Design of 500 kV Solid-state Marx Generator IGBT Driver Voltage Multi-channel Insulated Power Supply

Abstract: We designed a multi-channel insulated power supply system in order to satisfy the power requirements of IGBT driver in solid-state Marx generator,and analyzed and experimentally tested requirements of IGBT driversMoreover,we proposed power supply design,in which power conversion adopted DC-AC-DC conversion,and the cascade transformer and one-turn of the transformer primary were usedThe design method was verified to be feasibleMeanwhile,the special work mode of float power supply and key technology was illuminated,and the experimental results were discussedThe results illustrate that the power stability and isolated power supply meet the requirements and have a good prospect

Design of a Marx Generator for HEMP filter evaluation taking account of parasitic effect of components

Abstract: This paper introduces the design of a Marx Generator that can generate high attitude pulses up to 25 kV and 2.5 kA. The pulses have a wave shape representative of that used to test High-altitude ElectroMagnetic (HEMP) filters against the pulse current injection (PCI) requirements. The rise time is 20 ns and the pulse width is 230 ns on a 10 Ω resistor. In the design, it was found that parasitic effect of circuit components could significantly affect the performance of the generator. This is mainly because the pulse width is very narrow and its frequency spectrum is very wideband. The high-frequency circuit models of the components used in the generator were obtained by calculation and optimization, and then further verified by experiment. The verified circuit models were then used to design the three-stage generator. The measured performance agrees very well with the simulated one using the proposed circuit models.