| Pulsed Power and Transient Plasmas: Basic Research With Application to Ignition, Emissions, and New Pulsed Power Technology |
29 OCT 2004 |
11 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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 | Scientific progress lies in three areas: Pulsed power, transient plasma ignition, and applications of pulsed power to biology. We report here 1) Progress in studies of SiC pulsed power JFET devices for applications to pulsed power, 2) Significant progress in the application of transient plasma to ignition, with results during the previous year in the ignition of pulse detonation engines, and 3) Significant progress in the study of the effects ... |
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| Ultra Short Pulse Electroporative Physics and Technology |
AUG 2004 |
9 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERINGAND ELECTROPHYSICS
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| The project has demonstrated that ultra-short, high-field pulses are a useful tool for study of cellular physiology, and a potential therapeutic instrument for malignant cells. The research has established that intracellular effects including apoptosis can be induced by the application of short, intense (but low total energy) electric pulses. Experiments on human cells have produced convincing evidence that these applied fields nondestructively alter subcellular processes and can be investigated using ... |
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| Compact High Power Repetitive Pulsed Power Instrumentation |
JAN 2004 |
6 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| The vacuum system, pulse generator and oscilloscopes are used for pseudospark-BLT switch research. The pumping system is for achieving necessary high vacuum conditions. Observations of cell membrane perturbation in real time with sub-nanosecond time resolution is made possible by the PicoStar HR-12 CCD camera system and its custom table purchased under this AFOSR Grant. This High- Speed CCD camera system is a component of AFOSR-supported Transient Plasma Ignition research as ... |
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| The High Voltage Workshop and Power Modulator Conference (2002) |
FEB 2003 |
25 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| The 2002 International Power Modulator Conference was a grand success! Over 240 people attended and they contributed over 150 papers for publication. The conference served as host to nine exhibitors who displayed their latest high technology products. |
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| Pulsed Electric Fields for Biological Weapons Defense |
2002 |
12 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERINGAND ELECTROPHYSICS
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| The project has demonstrated that ultra-short, high-field pulses are a useful tool for study of cellular responses. The research has established that intracellular effects including apoptosis can be induced by the application of short, intense (but low total energy) electric pulses, and has seen variability in cell response. Experiments on human cells have produced convincing evidence that these applied fields nondestructively alter subcellular processes and can be investigated using biophotonic ... |
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| Plasma-Enhanced Combustion for Reduction of Rocket Plume Soot |
DEC 2001 |
6 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| This report demonstrates the application of transient plasmas for remediation of emissions both during and post-combustion. The project encompasses underlying physics and chemistry, plasma device and power conditioning engineering, and problems related to fabrication of practical devices. The major accomplishments include demonstration of an energy efficient approach, which is now being used for many plasma remediation applications, development of the knowledge of the underlying science including the role of transient ... |
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| Applied Physics Research for Innovation in Pulsed Power |
30 SEP 94 |
14 pages |
| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING AND ELECTROPHYSICS
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| The program addressed fundamental issues in pulsed power technology, emphasizing new GaAs based solid state switches, and new high power thyratron type switches. Results included demonstration of a fast GaAs-based vertical FET- type switch for power modulator, radar and microwave applications, and development of super-emissive cathode switches. Transition of this research to technology is discussed first, then summaries of some of the recent activity are presented. Technology transitions from the ... |
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| Negative Electron Affinity for Infrared Detection |
30 SEP 89 |
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| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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 | This study extensively examined the optical properties of gallium phosphide (GaP), and concentrated upon the optical bistability of GaP device and a gallium phosphide infrared detector based on linear upconversion. To detect upconverted infrared signal the photoconducting scheme was tried. In this case the noise current by the pumping beam and imperfect surface state is too dominant to see the signal since the probe is directly contacted on the sample. ... |
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| A Program of Basic Research for High Power Switching and Other High Power Devices |
23 MAY 89 |
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| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING AND ELECTROPHYSICS
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| The study of the physics of thyratron type switches under this contract has led to a new low pressure glow discharge switch that has a number of features that are desirable for high power applications. The switch has achieved high stand-off voltage and peak current (70 kA), has very fast current rate of rise, and operates near the glow-to-ar transition in hydrogen and other gases. It appears to have intriguing ... |
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| Electrically Excited Phenomena in Gas-Phase Devices |
18 OCT 85 |
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| Authors:
Martin A. Gundersen; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| The research program sought to analyze in a very quantitative way the high current glow discharge for hydrogen, and other gases that are of interest for optogalvanic opening switches, thyratons, and for other areas of high power switching, The work developed quantitative modesl, and this analysis, based on theory and experiment, provides a body of basic knowledge to be used for switch development and other applications. the program addressed properties ... |
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