Ellis L Loree

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High-voltage-rated solid-state switches such as insulated-gate bipolar transistors (IGBTs) are commercially available up to 6.5 kV. Such voltage ratings are attractive for pulsed power and high-voltage switch-mode converter applications. However, as the IGBT voltage ratings increase, the rate of current rise and fall are generally reduced. This tradeoff is(More)
Capacitor energy density for submicrosecond discharge applications was investigated for capacitors based on the following: 1) polymer-ceramic nanocomposite (PCNC); 2) antiferroelectric (AFE); and 3) paraelectric (PE) ceramic dielectrics. The developmental PCNC dielectric enabled design, fabrication, and testing iterations to be completed relatively rapidly.(More)
Simple inexpensive high performance optical absorption detectors are possible using light emitting diodes (LEDs) as light sources. The designs presented in the literature are reviewed. Designs used by the investigators are described in detail with respect to construction, electronic design, performance and cost; these have not previously been described in(More)
In many experiments, a flow-through heating arrangement is needed to reduce reaction time. Often the reaction conditions require inertness of the wetted material. Heated reactors based on polymeric tubing, notably PTFE, are the most common, and such reactors are typically used in a manner in which they are put in a heated bath or an otherwise thermally(More)
Plasma studies done on a high current demountable ignitron, utilizing a 70 GHz microwave interferometer, are described. While the estimated conduction plasma density of the tube derived from other research' is well above the 6*1013 CM-3 cutoff density of the 70 GHz microwavese information about the plasma recombination was obtained after the ignitron(More)
The University of Missouri-Columbia is presently developing 100-450 kV composite capacitors for compact pulsed power applications. To assess the lifetime of the nanodielectric capacitors, scaled high voltage tests are being conducted using a solid-state test stand that can operate at 48 kV. The 48 kV test stand is capable of discharging the scaled(More)
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