Marx generator

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

Pre-pulse suppression on Eros at AWE

Abstract: The Eros facility at AWE was designed to simulate radiation effects using a large area diode driven by a low impedance Blumlein charged by a Marx generator. Recent interest at AWE to develop low impedance, high current pinched diodes, have lead to a need to use Eros for these experiments. Unfortunately Eros has no pre-pulse suppression beyond the balancing circuit that evens out the charging of the inner and outer lines of the Blumlein. This allows a pre-pulse of +/- 100 kV to reach the diode during the charging phase of the machine, too high a level for pinched diodes. To reduce the pre-pulse two options were considered, both of which are needed: 1) to install a pre-pulse gap into the stalk of the MITL; and 2) to install rail gap switches between the inner cylinder of the Blumlein and the insulator stack. The stalk pre-pulse gap was demonstrated to work on Eros improving self-magnetic pinch diode performance. The rail gaps were designed and then fitted during the year. Together these switches reduced the total pre-pulse on the diode by a factor of eight.

A 2.8 MV, 600 kA pulsed power driver constructed at the University of Missouri-Columbia

Abstract: Summary form only given. The University of Missouri has completed construction of a new facility for pulsed power experimentation. The pulsed driver is driven by a Marx bank consisting of 32, 100 kV, 3.1 muF capacitors. The Marx bank can store 450 kJ and is switched into any combination of one or up to four, parallel, 7 nF intermediate storage capacitors. The intermediate storage capacitors are switched with a high voltage spark gap switch into a resistive load. The driver is capable of delivering 2.8 MV at 600 kA to a 4 ohm load. Simulations indicate that the driver is capable of producing 1 MA through a load with lower impedance. Initial uses for the facility include experimentation on switch jitter and arc spectroscopy on a spark gap switch. The test results are also used in the characterization of the machine. Simulations of the driver capabilities are presented along with details of the initial results.

Performance of an impedance-variable pulsed high-power electron-beam accelerator based on energy efficient transmission.

Abstract: Versatile high-power pulsed electron-beam accelerators that meet the requirements of pulsed high-power specifications are needed for appropriate applications in medical industry, defense, and other industries. The pulsed electron beam accelerator comprising a Marx generator and Blumlein pulse forming line (PFL) is designed to accelerate the electron beams at the level of 1 MeV when electrostatically discharging. The performance specifications of Marx generators consisting of a 100 kV DC power supply, R-L-C circuit, and high voltage switch are at a maximum 800 kV. At this time, by using the capacitance mismatching principle between the Marx generator and the Blumlein PFL under the law of preserving the amount of charge, it is possible to generate a high voltage in the form of a square pulse up to about 1.1 MV, as much as 1.37 times the charged voltage of the Marx generator. As a result, energy transmission from the Marx generator with a high efficiency of about 85% to the Blumlein PFL is possible. The aim of this study is that the pulsed high-power electron-beam accelerator can be used to change the diode impedance, and the energy of the accelerated electron beam reaches a level of 1 MeV with the square pulse width of about 100 ns at the flat-top in the range of relativistic electron beam generation. Performance tests were securely carried out by installing a dummy load based on CuSO4 solution varying the diode impedance to deter damage to the circuit by preventing reflected waves from being generated in the load.

A Macroscopic Gas Breakdown Relationship

Abstract: The design and construction of accelerators in the 100-terawatt class have significantly increased the demands placed on gas and liquid switching.1 The 100-terawatt PBFA II (Particle Beam Fusion Accelerator) uses 36 separate modules. Each module includes a Marx generator, a water-insulated energy store, a laser-triggered 5-MV switch, a 5-MV charge water pulse-forming line, and multiple self-breakdown megavolt water pulse sharpening switches. The resultant electrical pulse formed by PBFA II has subnanosecond syncronization in the main diode. During the analysis of the PBFA switching data, a scaling law was found that has implications for switch research and development.

Dielectric blade comb piston unlimited voltage generator, fusor and more

Abstract: The electric vs. mechanic bi-directional power conversion application has been traditionally and asymmetrically favoring at magnetic element as energy caching and buffering bridge, e.g. the electric motors and generators that are also abstracted as electromechanical devices. The theory behind electromechanical devices is electrodynamics. Based on the fast development of high energy density dielectric materials, my inventions are to be a game changer: let electrical field alone to take the heavy duty of electromechanical utilities, and let “dielectrodynamics” replace electrodynamics. Of the most importance is the key limitless high voltage generator, which can cover full gamut of voltages from volts to kilovolts (KV), megavolts (MV), gigavolts (GV), teravolts (TV), and whatever we need, just provided necessary space occupancy and mechanic work are secured to assist dielectric piston or blades displacement. As the nature of such an electric power supply, it is fit for pulse application, such as Z-pinch, particle accelerator, nuclear ignition, fusion reactor, ornithopter etc. Civil application is also possible, such as harvest wind power, pulse heating even with overunity and so on, but regular non-pulse application needs further power smoothing or conversion. It is the time of saying bye to Marx generator, rare earth magnetic materials, mile-size accelerator, country-size neutron spallation system and more, just cheerfully to embrace the epoch of powerful inexhaustible fusion energy and magnetic-free dielectrodynamic utilities.