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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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Proceedings ArticleDOI
23 May 2010
TL;DR: In this article, extensive testing performed on a 33-J Marx generator, which has been used as a source to drive various RF loads, was summarized and the thermal behavior of the Marx generator during operation at various pulse repetition frequencies as well as monitoring output pulse characteristics and reproducibility.
Abstract: Recent technological advancements in the field of directed energy have led to increased demand for sources capable of driving high-power RF and high-power microwave (HPM) radiators. APELC's line of Marx generators are uniquely qualified for use in various directed energy applications. Extensive testing performed on a 33-J Marx generator, which has been used as a source to drive various RF loads, will be summarized. Testing included characterizing the thermal behavior of the Marx generator during operation at various pulse repetition frequencies as well as monitoring output pulse characteristics and reproducibility. Pulse characteristics for nine other Marx generators varying from 10 mJ to 1.8 kJ in output energy will also be provided. In addition, measured RF and HPM data from various radiators sourced by APELC's Marx generators will be presented.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the authors explored the possibility of increasing the charge states of metal ions to facilitate high-energy, broad beam ion implantation at a moderate voltage level, using a time-of-flight (TOF) technique.
Abstract: Ion energy of the beam formed by an ion source is proportional to extractor voltage and ion charge state. Increasing the voltage is difficult and costly for extraction voltage over 100 kV. Here we explore the possibility of increasing the charge states of metal ions to facilitate high-energy, broad beam ion implantation at a moderate voltage level. Strategies to enhance the ion charge state include operating in the regimes of high-current vacuum sparks and short pulses. Using a time-of-flight (TOF) technique we have measured charge states as high as 7 + (73 kA vacuum spark discharge) and 4 + (14 kA short pulse arc discharge), both for copper, with the mean ion charge states about 6.0 and 2.5, respectively. Pulsed discharges can conveniently be driven by a modified Marx generator, allowing operation of “Magis” with a single power supply (at ground potential) for both plasma production and ion extraction.

5 citations

Proceedings ArticleDOI
M. Toury, J. Delvaux, E. Merle, C. Vermare, L. Veron 
13 Jun 2005
TL;DR: In this paper, a coaxial line was installed on the Marx generator ASTERIX at the CEG (Centre d'Etudes de Gramat) at PEM (Polygone d'Experimentation de Moronvilliers) to study the behavior of this kind of high voltage line and the energy fed to the diode.
Abstract: AT PEM (Polygone d'Experimentation de Moronvilliers), the CEA will build a flash x-ray generator based on LTD technology. In this machine, the electrical energy is transmitted to the X-ray diode by a MITL (magnetically insulated transmission line). To study the behavior of this kind of high voltage line and the energy fed to the diode, the CEA has undertaken to install a new coaxial line on the Marx generator ASTERIX, located at the CEG (Centre d'Etudes de Gramat). This modification will associate to the present vacuum line, a new element that will increase the radius of the internal conductor and decrease the radius of the external conductor to the dimensions of the future LTD generator line. Also it will increase the length of the line to study with more details the MITL behavior. To design this new element and optimize the different dimensions, PIC simulations with the LSP code were used. They permit to control magnetic insulation by taking into account the electronic current flow along the internal conductor and to show the effects of this addition on the Marx bank. In this paper, the design of this additional element and the different simulation results are presented. Also, the different diagnostics needed to characterize the power transmission and the magnetically insulation are specified.

5 citations

Proceedings Article
18 Jul 2004
TL;DR: In this paper, the authors present a review of studies on the production of S-band microwave pulses in a two-sectional single-mode vircator based on long-pulse (sub-microsecond) high-voltage generators.
Abstract: The paper presents a review of continuing studies on production of S-band microwave pulses in a two-sectional single-mode vircator [1, 2] based on long-pulse (sub-microsecond) high-voltage generators. The two pulsers were used (a) generator with inductive energy store and fuse opening switch and (b) generator based on Marx bank and water forming line. The peak microwave output was on the range of ~1 GW. Substantial spontaneous shortening of the microwave pulse was observed (50-100 ns). Possible mechanisms for this phenomenon are discussed and supported by 3-D KARAT simulations.

5 citations

Proceedings ArticleDOI
G.E. Leyh1
25 Jun 2007
TL;DR: The SLAC/ILC 'Reference Design' Marx Modulator is complete and testing is currently underway at SLAC, and advantages of the ILC Marx design include higher efficiency, smaller physical size, and a modular architecture that provides greater reliability and cost- effective PC board-level integration.
Abstract: Construction of the SLAC/ILC 'Reference Design' Marx Modulator is complete and testing is currently underway at SLAC. This modulator design is oil-free, air-cooled, and capable of delivering 120 kV, 140 A, 1400 musec pulses at a rate of 5 Hz. Total energy per pulse is 23,500 joules. Projected efficiency is greater than 96%. The Marx modulator design employs a stack of sixteen 12 kV Marx modules that generate high-voltage output pulses directly from a 12 kV input supply voltage. This direct switching eliminates the requirement for a massive transformer and reduces the capacitor bank size by more than a factor of four, yielding a considerably cheaper and more compact mechanical solution. Advantages of the ILC Marx design include higher efficiency, smaller physical size, and a modular architecture that provides greater reliability and cost- effective PC board-level integration.

5 citations


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