A New Modular XRAM-Like Inductive High- Current Pulse Generator Circuit Topology

Bo, Zhao; Li, Haitao; Wang, Liwei; Liu, Jian; Liu, Xiaohui

doi:10.1109/access.2020.3038451

Cited by 2 publications

(2 citation statements)

References 20 publications

(27 reference statements)

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“…The XRAM may be particularly attractive, due to its simplicity, high-energy density (MJ/MW), high power-transfer efficiency (≃90%), and its ability to provide sustained, high-average power at long life. XRAMs have also demonstrated their ability for real-time recovery of the reactive energy [41].…”

Section: High-voltage Power Supplymentioning

confidence: 99%

Neutralized, intense-ion beams for fusion

Wessel,

Egly,

Rogers

2024

Plasma Phys. Control. Fusion

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- A charge- and current-neutralized, intense-ion beam (IIB) will propagate undeflected in a magnetized plasma by the $\bf{E}\times\bf{B}$, or diamagnetic, drift for a distance large compared to the beam-ion gyro-radius. This propagation occurs because of collective plasma effects when the beam-energy density is sufficient to sustain the polarization-electric field, or diamagnetic-screening currents. Our principal interest is the \exb, with $\beta = \mathcal{E}_\text{beam}/ \mathcal{E}_\text{field} < 1$. IIBs are characterized by parameters in the range: 0.1-2 MeV ion energy, 1-100 MA/m$^2$ ion-current density, and 17 - 350 kW average power produced on repetitively-pulsed systems. Multi-MW average-beam power is possible with appropriate modifications to the power supply and ion-source/accelerator. IIBs can be focused geometrically, and/or magnetically, to spot sizes of the order of a few cm's and their angular divergence is typically, $\sim$15 mRadians, suitable for long-range propagation in a vacuum beam-line. IIBs lose energy and momentum in the same manner as particles injected by a neutral-beam injector (NBIs), hence could be useful for fusion applications, including: heating, current drive, fueling, profile modifications, etc., and such applications have yet to be thoroughly studied. Summarized here are the physical principles accounting for IIB propagation; ion-source designs used to produce the IIB; and pulsed-power methods for energizing the IIB accelerator. This technology base informs scalable metrics for the ion-source/accelerator (excluding the HV power supply and interconnects) used in a conceptual injector that provides the same ion energy and injected power (1 MeV, 17 MW) as NBIs used on ITER. A comparison indicates that the IIB injector would be much smaller in size, lower cost, and have much greater efficiency, while also providing for real-time modulation of the beam energy and intensity and the use of small-diameter injection ports that could minimize fuel contamination and magnetic-field leakage between the IIB injector and tokamak.

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Section: High-voltage Power Supplymentioning

confidence: 99%

Neutralized, intense-ion beams for fusion

Wessel,

Egly,

Rogers

2024

Plasma Phys. Control. Fusion

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“…For this reason, many studies were carried out to develop robust, efficient, flexible, and easy-to-use generators. Many of them are based on the classical architecture of a Marx generator (shown in Figure 1), such as in [13][14][15][16][17], transmission lines and Blumleinbased generators [18,19], RLC pulse-forming networks [20], and pulse transformer-based generators [21]. Besides biomedical treatments, pulsed power technologies have many other applications, such as plasma science [22][23][24], industrial process [25], ultrawideband radiation, and EMP generation [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

New Architecture of Solid-State High-Voltage Pulse Generators

2022

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The application of the nanosecond pulsed electric field (nsPEF) for biomedical treatments has gained more interest in recent decades due to the development of pulsed power technologies which provides the ability to control the electric field dose applied during tests. In this context, the proposed paper describes a new architecture of solid-state high-voltage pulse generators (SS-HVPG) designed to generate fully customised sequences of quasi-rectangular pulses. The idea is based on the combination of semiconductor switches (IGBT/MOSFET) known for their flexibility and controllability with special magnetic switches to build compact and modular generators. The proposed structure is inspired by the most known pulse generator of Marx, but mixes its two variants for negative and positive polarities. Thus, the polarity of the generated pulses can be freely selected. In addition to that, the use of IGBTs/MOSFET ensures a tunable repetition rate and pulse width. The capacitors are charged via a series of magnetic switches and a flyback DC–DC converter which provides fast and efficient charging and also an adjustable amplitude of the output pulses. The design can be easily simplified giving two other modified structures, based on the same idea, for mono-polar operating (only positive or only negative pulses) with a reduced number of switches. A SPICE simulation of the generator and results of experimental tests carried out on a three stages generator are presented. The obtained results confirm the operating principle and the claimed performances of the new structure.

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A New Modular XRAM-Like Inductive High- Current Pulse Generator Circuit Topology

Cited by 2 publications

References 20 publications

Neutralized, intense-ion beams for fusion

Neutralized, intense-ion beams for fusion

New Architecture of Solid-State High-Voltage Pulse Generators

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