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P d o w eof Engineering e s l Edward E. Whitacre Jr. College u r & Po Ele Ce er nt f P r o w r e 2013 / 2014 ctro nic s | T e ec X T , x a s T h Un iv e rsity | L u b b o c k The Center for Pulsed Power and Power Electronics Department of Electrical and Computer Engineering Texas Tech University, Lubbock, TX 79409-3102 P (806)742-3468 | F (806)742-1281 | E [email protected] Website: www.p3e.ttu.edu The Center for Pulsed Power and Power Electronics r o The P3E Center at a Glance d e s l Pu The Center for Pulsed Power and Power Electronics started as a Plasma research group at Texas Tech University in 1966. The initial work was concerned with harmonic ion cyclotron resonances in small mirror machines, laser heating of magnetized plasmas, and pellet injection in hot dense plasmas. In 1977 a small Tokamak was constructed and used for various wave propagation studies in the ion cyclotron range of frequencies. In the last few years the emphasis has been on power electronics, applications of plasma technology to pulsed power devices, high power microwave generation, explosive generators, and electric space propulsion engines. nt e r f Pulsed Power research at Texas Tech University began in the early 70’s with studies in high beta, controlled thermonuclear fusion. These initial investigations at Texas Tech, along with other developments in the field, established the need for a better understanding of the physical phenomena of pulsed power technology. The program is interdisciplinary and involves faculty members from several academic departments. Ce in-situ Plasma Cleaning Explosive pulsed power research at Texas Tech was started in 1998. It emphasizes Magnetic Flux Compression Generators and techniques for matching their outputs to various loads. Other explosive generators, such as ferroelectric and ferromagnetic generators have also been investigated. The area of pulsed power research involves storing, shaping, transmitting, and measuring high voltage, high current pulses of electrical energy. This is of importance to many application areas, such as laser drivers, high power microwave generators, particle accelerators, nuclear fusion, nuclear weapons effects and lightning simulations, industrial manufacturing technology, and electromagnetic mass drivers. The voltages and currents involved may be in the MV and MA range and time scales may be as short as the sub-nanosecond regime. This calls for extremely difficult and challenging materials, shielding, and measuring techniques. High power (> 100 MW) microwave source development is an important area for military applications. Power Electronics involves high efficiency power supply designs, rotating machines, and special, high power solid state circuit designs. 180 nm - 2.6 μm Laser System The Plasma, Power Electronics, and Pulsed Power Group at Texas Tech consists of eight faculty members, with a wide range of expertise, from the departments of ECE, ME, and Physics, an average of 25 graduate students, and 15 undergraduate student assistants. The clerical and technical-support-staff comprise four research engineers, one machinist, two technicians, one accountant, and one administrative business assistant. For further information about the plasma, power electronics, and pulsed power program at Texas Tech, contact any of the following faculty members. (Investigator and Research Area listed) X T The University Texas Tech University, founded in 1923, is a state-supported, coeducational institution and one of the principal institutions of higher learning in the Southwest. Texas Tech University prides itself on being a major comprehensive research university that retains the sense of a smaller liberal arts institution. Although enrollment is over 30,000, Texas Tech students boast of one-on-one interaction with top faculty and an environment that stresses student accomplishment above all else. We’re large enough to provide the best in facilities and academics, but small enough to focus on YOU. Texas Tech students come from every county in Texas, all 50 states and more than 90 foreign countries. Tech offers 150 undergraduate degree Texas Tech University Seal programs through 11 academic colleges, a graduate school and a school of law. We offer more than 100 master’s degree programs and over 50 doctoral degree programs. The Texas Tech University Health Sciences Center includes a School of Medicine with its Graduate School of Biomedical Sciences, a School of Nursing, and a School of Allied Health. The Department of Electrical and Computer Engineering (ECE) has rapidly expanded and developed its graduate programs over the past decade and currently has 24 faculty members, approximately 450 undergraduates, and 75 graduate students. Thirty years ago, the annual research funding was $46,000 and has increased to an average of about $6,000,000. , The Department of Physics offers M.S. degrees in Applied Physics in addition to the traditional degrees. Applied Physics majors can do research in Pulsed Power and take courses in Electrical Engineering. The major Professor can be from Physics or ECE. b o c k Powe r& S. B. Bayne (ECE) Texas Tech University, Lubbock Texas Faculty Po J. C. Dickens (ECE) Co-Director (806) 742-0526 w (806) 742-1255 E-mail: [email protected] Power Semiconductor Devices, Power Electronics, High Power Microwaves and Renewable Energy Power Electronics, Aerospace Electronics, Electric Space Propulsion and Pulsed Power Technology, High Efficency Power Processing, High Power Solid State Lasers and Power Electronics, Explosive Pulsed Power, and Microwave Communication Systems. M. Giesselmann (ECE) Department Chair L. L. Hatfield (Physics) (806) 742-3462 (806) 742-1256 E-mail: [email protected] E-mail: [email protected] Power Electronics, Rotating Machines, Utility Power systems, Gas Discharges, Electrical and Optical diagnostics, H.V. Measuring Techniques, High Power Switching Surface Physics, Atomic Physics, Electrical Space Propulsion, Dielectrics, High Voltage Insulators, High Power Microwaves er E-mail: [email protected] Ele ctro nic s | T e H. Krompholz (ECE / Physics) (806) 742-2224 (806) 742-1251 E-mail: [email protected] E-mail: [email protected] Plasma Dynamics, High Power Switching, Gas Discharges, Electrode and Insulator Properties, High Power Microwaves, Electrical Space Propulsion, Industrial Applications, Explosive Generators Plasma Physics, Gas Discharges, Dielectric Surface Flashover, High Speed Diagnostics, High Power Microwaves, Breakdown in Gases, Liquids and Solids J. J. Mankowski (ECE) A. A. Neuber (ECE) Co-Director (806) 742-3441 (806) 742-1250 x a s M. Kristiansen (ECE / Physics) E-mail: [email protected] HPM Sources, Pulse Forming Networks, Liquid Breakdown, Electric Space Propulsion, Pulsed Power Technology Dielectric Breakdown of Gases, Liquids, and Surfaces in Vacuum and at Elevated Pressure (Cryogenic to Room Temperature) Under Pulsed DC or HPM Fields, Explosive Driven Pulsed Power, High Power Microwaves, High Voltage Insulation, Low Temperature Plasmas T E-mail: [email protected] ec h U The Center for Pulsed Power and Power Electronics r o d e s l Pu Visiting & Adjunct Faculty / Researchers C. H. Watson-Munro, Univ. of Sydney, 1971 r Arndt Eberhagen, Max Planck Institut fur Plasma Physik at Garching near Munich, 1972 and 1973. e F. J. Paoloni, Univ. of Sydney, 1973. nt Karl I. Selin, Royal Institute of Technology, Stockholm, 1973 and 1974. f K. Ikuta, Nagoya Plasma Physics laboratory, Nagoya, Japan, 1985 and 1986. Shinsuke Watanabe, Yokohama National University, Yokohama, Japan, 1992. Toru Iwao, Tokyo University, Tokyo, Japan, 2000. W. Baker, (Adjunct Professor), Air Force Phillips Laboratory, Albuquerque, NM., 1988-1993. Weihua Jiang, Nagaoka University of Technology, Nagaoka, Niigata, Japan, 1992, 1998-99, and 2000. Bogdan Miedzinski, Technical University of Wroclaw, Poland, 1978 and 1979. Thomas Muller, Deutsche Forchungsgemeinschaft, Bonn, Germany, 1993-94. Alan Watson, University of Windsor, Canada, 1979, 1985, and 1986. Kevin Woolverton, Intel, 2000. Ce A. H. Guenther, (Adjunct Professor), Kirtland Air Force Base, Los Alamos National Laboratory, and Sandia National Laboratories, Univ. of New Mexico 1974-1989. Boy Blackwell, Univ. of Sydney, 1980. John Fletcher, School of Physical Sciences, The Flinders University of South Australia, 1982. Jean-Pierre Boeuf, Laboratoire de Physique des Discharges, Ecole Superieure d’Electricite, France, 1982. Frank Rose, (Adjunct Professor), Naval Surface Weapons Center, Dahlgren, Virginia, 1984 and 1986. Takao Namihira, Kumamoto University, Japan, 2003-04. Douyan Wang, Kumamoto University, Japan, 2003 and 2004. Euan Choi, Kwangwoon University, Seoul, South Korea, 2004. Han-Yong Ryu, Agency for Defense Development, South Korea, 2005. Klaus Frank, Erlangen University, Erlangen, Germany, 2007, 2008, and 2009. , X T H. Akiyama, Kumamoto University, Kumamoto, Japan, 1984 and 1986. Jian De Zhang, National University of Defense Technology, Changsha, Hunan, China, 2002. o c k Large High-Bay Laboratory b Powe r& Texas Tech University, Lubbock Texas The P3E Center at a Glance Research Areas •Electrical Space Propulsion Devices •Breakdown in Liquids and Solids w •Industrial Applications of Pulsed Power Technology Po Graduate Studies Numerous grants and contracts support a variety of research that provides opportunities for graduate students to interact with prominent researchers in industry and at national laboratories. These associations are valuable to the research in progress and the long-term benefits are inestimable. Financial support ($2,200 - $2,600 per month) for graduate study is for the most part obtained from Research Assistantships and Graduate Fellowships. All supported students pay in-state tuition and most of the tuition and fees are provided. er •Various Novel Switch Concepts Ele •The Interaction of Arc Channels with Electrodes and Insulators •High Power Microwave Studies •The Surface Physics of Insulators •Solid State Power Electronics •Erosion Resistant Materials for Space Propulsion ctro nic s | T e The Pulsed Power and Power Electronics Research Program at Texas Tech University has generated approximately 100 theses HPM Flashover Studies and dissertations over the past ten years. Plasma, Power Electronics and Pulsed Power related graduate courses offered in the ECE Department include: •Electromagnetic Field Theory •Sub-nanosecond Pulsed Gas Breakdown •Pulsed Power Technology •Explosive Driven Pulsed Power •Gaseous Electronics •Non-Equilibrium Plasmas •High Power Microwave Sources •Pulsed Vacuum UV Generation •Plasma Engineering •Corona Formation and Mitigation •Laser Spectroscopy •Circuit And Rotating Machine Modelling •Power Electronics •Electromagnetic Launchers •Machine Modelling and Control Laboratories and Support facilities A new Electrical Engineering research building, largely devoted to pulsed power related research was completed in 1980. Today, after the addition of a high bay laboratory space in 1999, the P3E Center occupies a total floor area of over 15,000 square feet. Additional space of 12,000 square feet is used in the off-campus research building. x a s T ec h Off Campus Research Facility U The Center for Pulsed Power and Power Electronics r o Equipment and Facilities Computer Processing Capabilities The computer resources available in the Pulsed Power Laboratory include several state-of-the art MPS workstations, high-end 3-D graphics coprocessors and high-speed network connections. Also available in the lab are various workstation class PC’s, color and black & white printers, scanners, image converter cameras, mega-pixel SLR digital cameras and MS Windows domain servers with redundant hard drives and domain backup servers. nt e r Ce Like the hardware, an impressive list of software is available in the Center. This software includes professional versions of OrCad PSpice, Synopsys Saber, Simplore (high-end circuit solvers), Maxwell 3-D (electro and magneto static Dell PowerEdge Network / eddy current field solver), Servers Ansoft HFSS (3-D electromagnetic field solver), Matlab (technical programming language), Autodyn 3-D (interactive non-linear dynamic and hydro-dynamic analysis software), CTH 3-D hydrodynamic code and COMSOL (finite element method for solving systems of partial differential equations). In addition to its own computing facilities, the Pulsed Power Laboratory has access to the university’s High Performance Computing Center (HPCC) which houses several hundred Intel computer nodes on several clusters and grid servers with data stored on large Luster file systems. Equipment and Facilities A representative sample of the equipment and facilities available for research includes: •Pulsed high voltage, high current diagnostic equipment including conventional probes and optical detectors of electric fields •Fast Oscilloscopes f •Image converter streak and framing cameras with picosecond or nanosecond temporal resolution •High voltage, high power loads •Residual gas analyzers •Spectroradiometer •Microwave equipment •Rotating prism and mirror framing cameras Haas VF-3 •Numerous vacuum stations •Microwave Interferometers •Magnetic coil systems and associated power supplies •Various large vacuum tanks •FT IR-Spectrometer •Closed cycle refrigeration system 16 GHz Agilent infiniium Oscilloscope •Fluorescence detection system for CW and transient measurements •Programmable pico-ammeter and voltage sources •High potential testers •Febetron flash x-ray, 300 keV •OMA systems for VUV-UV-VIS-NIR spectroscopy •Multiple explosive chambers •Numerous high voltage D.C. power supplies •Space simulation chamber 4 Million Frames per Second Digital Framing Camera X T •Line pulsers and PFN’s •Pulsed and CW lasers with a wide range of wavelengths and power outputs •High power microwave equipment •Numerous spark gaps, rail gaps, ignitrons, thyratrons and solid state switches •Marx generators (up to 2 MV) d e s l Pu •Laboratory power capability: 500 kVA single outlet; 1MVA total •Dimension SST 1200es 3-D printer •Class 100,000 (ISO8) clean room •Haas TL-1 tool room lathe •Haas TM-1 tool room mill •Haas GR-510 Gantry router •Double wall Faraday cages •Haas VF-3 vertical machining center w/ 4th axis o c k •Optical equipment, detectors and spectrometers 500oC Bakeout Oven •26 foot shielded mobile diagnostic trailer b , •Scanning electron and optical microscopes Powe r& Texas Tech University, Lubbock Texas Journal Publications Journal Publications (2011 - May 2013) Po •“Reliable Operation of SiC JFET Subjected to Over 2.4 Million 1,200-V/115-A Hard Switching Events at 150 °C,” IEEE Electron Device Letters, 2013 •“Material selection considerations for coaxial, ferrimagnetic-based nonlinear transmission lines,” Journal of Applied Physics, 2013 •“All solid-state high power microwave source with high repetition frequency,” Review of Scientific Instruments, 2013 •“Ferromagnetic Nonlinear Transmission Lines as High Power Microwave Source,” IEEE Transactions on Plasma Science, 2013 •“Light Emission From CsI-Coated Carbon Velvet Cathodes Under Varied Conditions,” IEEE Transactions on Plasma Science, 2012 •“Electric Field Enhanced Conductivity in Strongly Coupled Dense Metal Plasma,” Physics of Plasmas, 2012 •“The Impact of Wire Environment on Electro-Explosive Fuse Performance,” IEEE Transactions on Plasma Science, 2012 •“Shallow Incorporation of Nitrogen in HPSI 4H-SiC through the Laser Enhanced Diffusion Process,” 2012 Materials Science Forum Plasma Arcjet for Soil •“Operation of a Stabilization Sealed-TubeVircator HighPower-Microwave Source,” IEEE Transactions on Plasma Science, 2012 •“Hard-Switch Stressing of Vertical-Channel ImplantedGate SiC JFETs,” IEEE Electron Device Letters, 2012 •“Reliable Operation of 1,200-V SiC Vertical JunctionField-Effect-Transistor Subjected to 16,000-Pulse Hard Switching Stressing,” Materials Science Forum, 2012 •“Avalanche Breakdown Energy in Silicon Carbide Junction Field Effect Transistors,” 2012 Materials Science Forum •“Experimental and Theoretical Evaluation of Surface Coated Exploding Wires,” Physics of Plasmas, 2012 T •“Characterization of Annealed HPSI 4H-SiC for Photoconductive Semiconductor Switches,” Materials Science Forum, 2012 •“Evaluation of High Power Experimental SiC SGTO Devices for Pulsed Power Applications,” Materials Science Forum, 2012 Mobile Diagnostic Trailor •“Optical emission spectroscopy study in the VUV-VIS regimes of a developing low-temperature plasma in nitrogen gas,” Journal of Applied Physics D, 2012 ec 1,000 oC Brazing Oven x a s •“Design and testing of multi-standard waveguide couplers,” Review of Scientific Instruments, 2012 •“Charged Electret Deposition for the manipulation of High Power Microwave Flashover Delay Times,” Physics of Plasmas, 2012 ctro nic s | T e Class 100,000 ISO8 Clean •“Nonlinear Room transmission line performance under various magnetic bias environments,” Journal of Directed Energy, 2013 Ele •“Simultaneous Measurement of Nitrogen and Hydrogen Dissociation from Vacuum Ultraviolet Self-Absorption Spectroscopy in a Developing Low Temperature Plasma at Atmospheric Pressure,” Applied Physics Letters, 2013 •“A finite-difference time-domain simulation of high HPM Vircator Research power microwave generated plasma at atmospheric pressure,” Physics of Plasmas, 2012 er •“High Temperature Unclamped Inductive Switching Mode Evaluation of SiC JFET,” IEEE Electron Device Letters, 2013 w •“A compact 45 kV curve tracer with picoampere current measurement capability,” Review of Scientific Instruments, 2013 •“Exploding Wire Experiments and Theory for Metal Conductivity Evaluation in the Sub-eV Regime,” Phys. Review E, 2012 h U The Center for Pulsed Power and Power Electronics r o Journal Pubilications •“Investigation of the delay time distribution of high power microwave surface flashover,” Physics of Plasmas, 2011 r •“Imaging of Pressure-Dependent High Power Microwave Surface Flashover,” IEEE Transactions on Plasma Science, 2011 f d e s l Pu Ce nt e • “Rapid formation of dielectric surface flashover due to pulsed high power microwave excitation,” IEEE Transactions on Dielectric and Electrical Insulation, 2011 • “Statistical analysis of high power microwave breakdown surface flashover delay times in nitrogen with metallic field enhancements,” Physics of Plasmas, 2011 HAAS TM-1 •“Relating Physics of Electret Charging using Vacuum UV Photo-Ionization to Seed Electron Production during High Altitude Plasma Breakdown,” IEEE Electrical Insulation Magazine, 2011 •“Spatially Resolved Vacuum UV 45 kV Compact Curve Tracer Spectral Imaging of Pulsed Atmospheric Flashover,” IEEE Transactions on Plasma Science, 2011 •“Phenomenology of Streamer Propagation during Pulsed Dielectric Surface Flashover,” IEEE Transactions on Dielectrics and Electrical Insulation, 2011 Conference Proceedings (2011 - May 2013) •“Bias Field Controlled Phasing of Ferrimagnetic Coaxial Nonlinear Transmission Lines,” 2013 Pulsed Power Conference , •“Current Capabilities of a Low Inductance Marx Generator for Driving a High Power Microwave Source,” 2013 Pulsed Power Conference •“Burst Mode Operation of > 100 MW Reflex Triode Vircator,” 2013 Pulsed Power Conference •“Performance of NEG Getter Material in a Sealed Reflex-Triode Vircator at 225 A/cm2,” 2013 Pulsed Power Conference •“Frequency Tunable Sealed Tube Reflex Triode Vircator,” 2013 Pulsed Power Conference •“Pulsed Power Switching of 4H-SiC Vertical D-MOSFET and Device Characterization,” 2013 Pulsed Power Conference •“Post Pulse Recovery of HPM Generated Plasma at Close to Atmospheric Pressure,” 2013 Pulsed Power Conference Explosives Chamber SiC JFET Testing Under Extreme Conditions •“Study of LowTemperature Plasma Development Utilizing a GPU-Implemented 3D PIC/MCC Simulation,” 2013 Pulsed Power Conference •“Selective Electron Beam Irradiation of High Purity SemiInsulating 4H Silicon Carbide Substrates to Characterize the Effects on Photoconductive Semiconductor Switch Operation,” 2013 Pulsed Power Conference •“Microwave Radiation from a SiC PCSS Driven Gyromagnetic NLTL,” 2013 Pulsed Power Conference o c k •“A High-Power Transient Coaxial Power Combiner for Nonlinear Transmission Lines,” 2013 Pulsed Power Conference X T •“High Voltage Solid Dielectric Coaxial Ferrimagnetic Nonlinear Transmission Line,” 2013 Pulsed Power Conference •“Rapid Capacitor Charger and Battery System for Portable Pulsed Power Applications,” 2013 Pulsed Power Conference b •“Design and evaluation of a compact silicon carbide photoconductive semiconductor switch,” IEEE Transactions on Electron Devices, 2011 SEM Imaging of HPM Carbon Fiber Cathodes Powe r& Texas Tech University, Lubbock Texas Conference Proceedings Po •“Performance and Characterization of a 20 kV, Contact Face Illuminated, Silicon Carbide Photoconductive Semiconductor Switch for Pulsed Power Applications,” 2013 Pulsed Power Conference er •“An Experimental System for the Measurement of Vacuum UV below 115 nm from Pulsed Plasma in an N2/ O2 Environment,” 2013 Pulsed Power Conference w •“A Passive Method for Determining Plasma Dissociation Degree Using Vacuum UV Self-Absorption Spectroscopy,” 2013 Pulsed Power Conference •“Design of an Advanced Modular Automated Evaluation System for Experimental High Power Si and SiC SGTOs,” 2013 Pulsed Power Conference Ele •“Hydrodynamic and Magnetohydrodynamic Modeling in-situ VUV Studies •“Experimentation and Simulation of High Current Density Surface Coated Electro-Explosive Fuses”, 2012 IEEE International Power Modulator and High Voltage Conference ctro nic s | T e •“A 50 kV Silicon Carbide Photoconductive Switch for Pulsed Power Systems”, 2012 Euro-Asian Pulsed Power Conference •“Fiber Optic System for High Frequency Burst Operation of a Silicon Carbide Photoconductive Semiconductor Switch,” 2012 IEEE International Power Modulators and High Voltage Conference Compact HPM Reflex-Triode Virtual Cathode Oscillator of Exploding Wires in Opening Switch Type Operation,” 2013 Pulsed Power Conference •“Electro-Thermal Transient Simulation of Silicon Carbide Power Mosfet,” 2013 Pulsed Power Conference •“The Effects of Sub-Contact Nitrogen Doping on Silicon Carbide Photoconductive Semiconductor Switches,” 2012 IEEE International Power Modulators and High Voltage Conference HAAS GR-510 •“Development and Characterization of a Pulsed Micro Hollow Cathode Discharge Array,” 2013 Pulsed Power Conference •“Experiments of Vacuum UV Absorption during LowTemperature Plasma Formation at Atmospheric Pressure,” 39th IEEE International Conference on Plasma Science, 2012 •“Comparison of CsI coated Carbon Velvet and Aluminum Cathodes Operated at Current Density on the order of 300 A/cm2,” 2012 IEEE International Power Modulator and High Voltage Conference •“A Photoconductive-Switched Nonlinear Transmission Line for Use as a Compact, MW-Class High Power Microwave System,” 2012 Euro-Asian Pulsed Power Conference x a s •“Anode Material Outgassing at 250 A/cm2 Current Density Under UHV Conditions,” 2012 IEEE International Conference on Plasma Science T ec h SiC Photoconductive Switches Electron Explosive Emission •“Gas Evolution of Nickel, Stainless Studies of HPM Anodes Steel 316, and Titanium Anodes in Vacuum Sealed Tubes,” 2012 IEEE International Power Modulators and High Voltage Conference U The Center for Pulsed Power and Power Electronics r o Conference Proceedings •“A Compact, Phaseable MW-Class High Power Microwave System Using an Integrated Photoconductive Switch and Nonlinear Transmission Line,” 2012 IEEE International Power Modulators and High Voltage Conference r •“Nanosecond-Scale Spectroscopy of Vacuum Ultraviolet Emission from Pulsed Atmospheric Discharges,”2011 Pulsed Power Conference f •”Laser enhanced diffusion of nitrogen in high purity semiinsulating 4H silicon carbide substrates for non-rectifying contact formation to photoconductive semiconductor switches,” 2011 Pulsed Power Conference nt e •“Design of an Automated Test Bed for Experimental Si and SiC SGTO Devices,” 2012 IEEE International Power Modulators and High Voltage Conference d e s l Pu Ce •“Investigation of Vacuum Ultraviolet Emission and Absorption during Pulsed Surface Flashover along Dielectric Interfaces,” 15th Annual Directed Energy Symposium, 2012 •“Microwave Optical Guide Star: A Tool for Correcting Atmospheric Aberration,” 11th Directed Energy Test and Evaluation Conference, 2012 •“Recent Experiments of Vacuum UV Emission and Absorption during Pulsed Atmospheric Breakdown,” 2012 European Electromagnetics Symposium •“Simulation of an Exploding Wire Opening Switch”, 2012 IEEE International Megagauss Magnetic Field Generation and Related Topics Conference “ Reflex-Triode Vircator HPM Source •Analysis of SiC Super Junction Transistors during pulsed operation,” 2011 IEEE Pulsed Power Conference •“Analysis of SiC JFET devices during pulsed operation,” 2011 IEEE Pulsed Power Conference •“Evaluation of experimental Silicon SGTO devices for Pulsed Power Applications,” 2011 IEEE Pulsed Power Conference •“Design of a diagnostic system for use in optical and VUV spectroscopy of explosive emission,” 2011 IEEE Pulsed Power Conference •“Exploration of Self-Produced Vacuum Ultraviolet Radiation from Dielectric Surface Flashover at Atmospheric Pressure,” 2011 IEEE Conference on Electrical Insulation and Dielectric Phenomena Exploding Wire Testing •“Study of Self-Absorbed Vacuum Ultraviolet Radiation during Pulsed Atmospheric Breakdown in Air,” 64th Gaseous Electronics Conference, 2011 •“Recombination lifetime modification in bulk, semiinsulating 4H-SiC photoconductive switches,” 2011 IEEE Pulsed Power Conference HPM Cathode DC Plasma Discharge Cleaning X T •“Unique high energy test bed for experimental thyristor devices,” 2011 IEEE Pulsed Power Conference •“Diagnostic measurements on explosive emission cathodes operating at high current densities and UHV pressures,” 2011 Pulsed Power Conference , •“Physics Investigations of Vacuum Ultraviolet Emission from Pulsed Atmospheric Discharges,” 2011 IEEE International Conference on Plasma Science Compact PFN Marx Generator b o c k r& Texas Tech University, Lubbock Texas Research Projects Po w er Ele Rapid Capacitor Chargers ctro nic s | T e High Voltage SiC Switch Testbed x a s T ec h Advanced Large Area Cathode Preparation U Powe Faculty, Staff and Students r& Po Ele Ce er nt e Powe w r r o f sed l u P ctro nic s | T e ec X T , x a s T h Un iv e rsity | L u b b o c k