Development of solid-state induction modulators for high PRF accelerators

Kirbie, H.C.; Hawkins, Steven A.; Hickman, B.C.; Lee, B.; Newton, Mark A.; Ollis, C.W.; Brooksby, Craig; Gilbert, D.; Longinotti, D.; Eubank, E.

doi:10.1109/ppc.1995.596518

Cited by 20 publications

(9 citation statements)

References 2 publications

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“…-k2(id) +k3e -k4(id) (1) where: Rd is the diode resistance of the LED id is the current flowing through the LED kn is the coefficients of the double exponential fit A 40 mΩ resistor was used as the CVR and a 55 Ω resistor, R, was used to limit the current flowing through the LED. The current through the CVR can be calculated from the measured optical power using equation (2) and the straight line fit of id versus Po.…”

Section: Rd = K0+k1ementioning

confidence: 99%

“…Three subsystems are being developed to produce an all optical modulator that uses optical fibers to achieve analog control, low-voltage power supply, and diagnostics. The modulator consists of a large array of field effect transistors (FETs) that switch a high-voltage pulse across a tape-wound magnetic core [1]. The FETs within the modulator are mounted on numerous circuit boards that are stacked in series for high-voltage operation.…”

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confidence: 99%

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Optical control, diagnostic and power supply system for a solid state induction modulator

Saethre

Kirbie²,

Lee³

et al. 1997

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Section: Rd = K0+k1ementioning

confidence: 99%

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confidence: 99%

Optical control, diagnostic and power supply system for a solid state induction modulator

Saethre

Kirbie²,

Lee³

et al. 1997

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“…While it appeared to be possible to adapt the existing technology to supply a second pulse, the chosen (and superior) path employs a topology that has been developed over the past several years by and for the LLNL Beam Research Program. 4.5…”

Section: Introductionmentioning

confidence: 99%

A high current, high voltage solid-state pulse generator for the NIF Plasma Electrode Pockels Cell

Arnold

Barbosa

Cook

et al. 2007

2007 16th IEEE International Pulsed Power Conference

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A high current, high voltage, all solid-state pulse modulator has been developed for use in the Plasma Electrode Pockels Cell (PEPC) subsystem in the National Ignition Facility.The MOSFET-switched pulse generator, designed to be a more capable plug-in replacement for the thyratron-switched units currently deployed in NIF, offers unprecedented capabilities including burst-mode operation, pulse width agility and a steady-state pulse repetition frequency exceeding 1 Hz. Capable of delivering requisite fast risetime, 17 kV flattop pulses into a 6 Ω load, the pulser employs a modular architecture characteristic of the inductive adder technology, pioneered at LLNL for use in acceleration applications 1 , which keeps primary voltages low (and well within the capabilities of existing FET technology), reduces fabrication costs and is amenable to rapid assembly and quick field repairs.

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“…While the hardtube performance was very good, concerns regarding future availability and reliability of these devices led to consideration of a solid-state replacement. Personnel within the Beam Research Program at LLNL had developed considerable expertise with parallel and series arrays of power MOSFETs during the successful design and testing of the Advanced Radiograph Machine (ARM) modulator, a high power pulser developed to show feasibility of solid-state modulators for driving induction accelerators [2]. While ARM was designed for higher voltages and currents than required by the kicker, its requirements for rise and fall times were also significantly slower.…”

Section: Introductionmentioning

confidence: 99%