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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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TL;DR: A measuring system based on a resistive divider using a copper sulfate (CuSO4 solution) has been developed and the experimental results show that it is capable of maintaining the output impulse of the Marx generator with rise time of 13 ns and amplitude of 170 kV.
Abstract: A measuring system based on a resistive divider using a copper sulfate (CuSO4 solution) has been developed to measure high-voltage impulses with rise times of several tens of nanoseconds. The response and temperature characteristics of the resistive divider have been studied. The divider has excellent response characteristics (<; 1-ns theoretical rise time) and good immunity from interference from a Marx generator and spark-gap switch. Stray parameters of the resistive divider are theoretically calculated, and their influences on the square-wave response are studied by Alternative Transients Program/ ElectroMagnetic Transient in DC System simulations. The measuring system is shielded using coaxial construction techniques. The experimental results show that it is capable of maintaining the output impulse of the Marx generator with rise time of 13 ns and amplitude of 170 kV.
20 citations
01 Jan 2009
TL;DR: Pulsed high voltage was applied to logs for mushroom culturing to clarify an effect of the pulse high-voltage stimulation on mushroom yield as mentioned in this paper, which clearly showed that the yields for four kinds mushroom increased to 1.5-2.1 times larger yield by applying pulse voltage as electrical stimulation.
Abstract: Pulsed high voltage was applied to logs for mushroom culturing to clarify an effect of the pulse high-voltage stimulation on mushroom yield. Inductive energy storage system was employed to construct a pulsed power generator with compact size. Copper thin fuse was used as opening switch to interrupt large circuit current in short time. Four stages Marx generator was used to supply a large current to a secondary energy storage inductor. The output voltage of the inductive energy storage system pulsed power generator was 120 kV with 50 ns pulse width at 5 kV charging voltage to the primary energy storage capacitor. This pulsed high-voltage was applied to sawdust-based block for culturing Lyophyllum decastes and natural logs for culturing Lentinula edodes, Pholiota nameko and Naematoloma sublateritium as an electrical stimulation. The experimental results clearly showed that the yields for four kinds mushroom increased to 1.5-2.1 times larger yield by applying pulse voltage as electrical stimulation.
19 citations
01 Dec 2009
TL;DR: In this paper, a 19 stages Miniature Marx Generator using bipolar junction transistors (BJTs) to produce high voltage and low energy pulses with nano-seconds pulse rise time is described.
Abstract: We have developed a small sized all solid-state pulsed power generator for industrial applications and biomedical applications such as an ozonizer and a cell treatment. In this paper, a novel 19 stages Miniature Marx Generator using bipolar junction transistors (BJTs) to produce high voltage and low energy pulses with nano-seconds pulse rise time is described. This pulsed power generator is consisted of a Cockroft-Walton circuit and a Miniature Marx circuit. The Cockroft-Walton circuit charges all capacitors and the charging voltage is about 300 V. The Miniature Marx circuit is consisted of resistors, capacitors, and BJTs as extreme high speed closing switches using avalanche breakdown phenomena. Another set of BJTs are placed in parallel with the load to turning off a load current. The size of Miniature Marx circuit is 72 mm × 95 mm. The pulsed power generator developed here has an output voltage of about −5.2 kV and a pulse duration of 7 ns. The charging energy of primary capacitors is the milli-Joule regime.
19 citations
TL;DR: In this article, the authors investigated some of the problems involved in switching fast, high-power pulses using single-turn saturable core inductors constructed of Metglas 2605SC, including holdoff voltages and times, output pulse risetimes, B•H curves of the material under fast pulse conditions, and propagation of the saturation field through the core.
Abstract: We have investigated some of the problems involved in switching fast, high‐power pulses using single‐turn saturable core inductors constructed of Metglas 2605SC. These include hold‐off voltages and times, output pulse risetimes, B‐H curves of the material under fast pulse conditions, and propagation of the saturation field through the core. Experiments were done at Sandia on the RAMSES I accelerator which uses a 200‐kV Marx generator to provide a 200‐ns pulse to a 1 Ω coaxial water transmission line.
19 citations
10 Jun 2008
TL;DR: In this article, a prototype of the inductive pulsed-power supply called the current multiplier by inductive storage (CMIS) was developed, which is called the CMIS characteristics and the results of experiments using CMIS.
Abstract: We have been developing an inductive pulsed-power supply consisting of many coils with Marx generator methodology. A Marx generator is charged in a parallel connection of capacitors and discharged in a series connection to obtain a high-voltage impulse. In contrast, this inductive pulsed- power supply is excited in a series connection of coils and discharged in the parallel connection to obtain a pulsed large electric current. Our preliminary experiment showed that this process was correct. As the next step, we have developed a prototype of the inductive pulsed-power supply, which we call the current multiplier by inductive storage (CMIS). Here we describe the CMIS characteristics and the results of experiments using CMIS.
19 citations