2016 / 2017 Dept of Electrical and Computer Engineering

Transcription

1 2016 / 2017 Dept of Electrical and Computer Engineering Center for Pulsed Power & Power Electronics Texas Tech University Lubbock, TX The Center for Pulsed Power and Power Electronics Department of Electrical and Computer Engineering Texas Tech University, Lubbock, TX P (806) F (806) E p3e@ttu.edu Website:

2 The Center for Pulsed Power and Power Electronics The P3E Center at a Glance The Center for Pulsed Power and Power Electronics had its beginning as a Plasma research group at Texas Tech University in Harmonic ion cyclotron resonances in small mirror machines, laser heating of magnetized plasmas, and pellet injection in hot dense plasmas were some of the early research topics. In 1977 a small Tokamak was constructed and used for various wave propagation studies in the ion cyclotron range of frequencies. In more recent years the emphasis has been on compact pulsed power, high power microwave generation, fundamental studies of electric breakdown, wide bandgap switch development and evaluation, explosively driven pulsed power generators, ionospheric applications, and of course, power electronics. in-situ Plasma Cleaning The Center s primary focus shifted to Pulsed Power research in the early 70 s driven by studies in high beta, controlled thermonuclear fusion. These initial investigations at Texas Tech, along with other developments in the field, uncovered the need for a better understanding of the physical phenomena of pulsed power technology. The program has been interdisciplinary from the beginning and involves faculty members from several academic departments. Center for Pu Explosive driven pulsed power research at Texas Tech was started in It emphasized 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. More recently, the machining limits of dry machined polymer-bonded HEs have been explored. Generally, pulsed power research involves storing, shaping, transmitting, and measuring high voltage, high current pulses with the goal of delivering electrical energy to a load or applicator. The energy is transferred in short pulses of high power enabling a variety of 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 Mega-Volts and Mega-Ampere range, and time scales may be as short as the sub-nanosecond regime. This calls for extremely difficult and challenging material selection, 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 and capacitor charger designs, rotating machines, and special high average power solid state circuit designs. Applications are towards conversion and control of electric power, including renewable energy systems, energy storage, and electric vehicles. The Plasma, Power Electronics, and Pulsed Power Group at Texas Tech consists of eight faculty members, with a wide range of expertise, with ECE, ME, and Physics background, an average of 20 graduate students, and 10 undergraduate student assistants. The clerical and technical-support-staff comprise three research engineers, one machinist, three technicians, one business manager, and one buyer. For further information about the plasma, power electronics, and pulsed power program at Texas Tech, contact any of the faculty members listed on the following page. (Investigator and Research Area listed). 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 35,000, Texas Tech students boast of one-on-one interaction with top faculty and an environment that stresses student accomplishment above all else. We are large enough to provide the best in Texas Tech University Seal NLTL Array System facilities and academics, but small enough to focus on YOU. Texas Tech University students come from every county in Texas, all 50 states and more than 90 foreign countries. A total of 150 distinct undergraduate degree programs are offered through eleven academic colleges, a graduate school, and a school of law. On the graduate level, more than 100 master s degree programs and over 50 doctoral degree programs are offered. 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. As of 2017, a branch of ARL South will be based at Texas Tech University. bock, TX The Department of Electrical and Computer Engineering (ECE) has rapidly expanded and developed its graduate programs over the past decade and currently has 27 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 $8,000,000. 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.

3 Faculty Texas Tech University, Lubbock Texas J. C. Dickens (ECE) Co-Director (806) Power Electronics, Aerospace Electronics, Electric Space Propulsion and Pulsed Power Technology, High Efficiency Power Processing, High Power Solid State Lasers and Power Electronics, Explosive Pulsed Power, and Microwave Communication Systems A. A. Neuber (ECE) Co-Director (806) 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 M. Giesselmann (ECE) Department Chair (806) er & Power Electronics Texas Tech Power Electronics, Rotating Machines, Utility Power Systems, Gas Discharges, Electrical and Optical Diagnostics, High Voltage Measuring Techniques, High Power Switching M. Kristiansen (ECE / Physics) Director Emeritus (806) m.kristiansen@ttu.edu Plasma Dynamics, High Power Switching, Gas Discharges, Electrode and Insulator Properties, High Power Microwaves, Electrical Space Propulsion, Industrial Applications, Explosive Generators S. B. Bayne (ECE) Professor (806) R. Joshi (ECE) Professor (806) stephen.bayne@ttu.edu Power Semiconductor Devices, Power Electronics, High Power Microwaves and Renewable Energy ravi.joshi@ttu.edu Pulsed Power and High Power Microwaves, High Field Transport and Semiconductor Modeling, Electrophysics, Bio-electrics J. J. Mankowski (ECE) Professor (806) M. He (ECE) Assistant Professor (806) john.mankowski@ttu.edu HPM Sources, Pulse Forming Networks, Liquid Breakdown, Electric Space Propulsion, Pulsed Power Technology miao.he@ttu.edu Cyber-physical power systems, Monitoring and data fusion for smart grids, Power system operations with high penetration of renewable resources, Online dynamic security assessment of power systems using PMU measurements

4 The Center for Pulsed Power and Power Electronics C. H. Watson-Munro, Univ. of Sydney, Arndt Eberhagen, Max Planck Institut fur Plasma Physik at Garching near Munich, 1972 and F. J. Paoloni, Univ. of Sydney, Karl I. Selin, Royal Institute of Technology, Stockholm, 1973/74. A. H. Guenther, (Adjunct Professor), Kirtland Air Force Base, Los Alamos National Laboratory, and Sandia National Laboratories, Univ. of New Mexico Bogdan Miedzinski, Technical University of Wroclaw, Poland, 1978 and Alan Watson, University of Windsor, Canada, 1979, 1985, and Visiting & Adjunct Faculty / Researchers Shinsuke Watanabe, Yokohama National University, Yokohama, Japan, Weihua Jiang, Nagaoka University of Technology, Nagaoka, Niigata, Japan, 1992, , and Thomas Muller, Deutsche Forchungsgemeinschaft, Bonn, Germany, Toru Iwao, Tokyo University, Tokyo, Japan, Kevin Woolverton, Intel, Jian De Zhang, National University of Defense Technology, Changsha, Hunan, China, Center for Pu Takao Namihira, Kumamoto University, Japan, Douyan Wang, Kumamoto University, Japan, 2003/2004. Boy Blackwell, Univ. of Sydney, John Fletcher, School of Physical Sciences, The Flinders University of South Australia, Jean-Pierre Boeuf, Laboratoire de Physique des Discharges, Ecole Superieure d Electricite, France, Frank Rose, (Adjunct Professor), Naval Surface Weapons Center, Dahlgren, Virginia, 1984 and H. Akiyama, Kumamoto University, Kumamoto, Japan, 1984 and K. Ikuta, Nagoya Plasma Physics laboratory, Nagoya, Japan, 1985 and W. Baker, (Adjunct Professor), Air Force Phillips Laboratory, Albuquerque, NM., Euan Choi, Kwangwoon University, Seoul, South Korea, 04 Han-Yong Ryu, Agency for Defense Development, South Korea, Klaus Frank, Erlangen University, Germany, 2007/08/9. Thomas Schramm, Julius-Maximilians-Universität Würzburg, Germany, Dirk Trienekens, Eindhoven University of Technology. Netherlands, 2013/14. Shu Lin, Xi an Jiaotong University, China, Takeshi Ihara, National Institute of Technology, Sasebo College, Japan, 2015/16. Shinji Yamamoto, Tokyo City University, Japan, 2016/17. bock, TX Large High-Bay Laboratory

5 The P3E Center at a Glance Texas Tech University, Lubbock Texas Research Areas Graduate Studies er & Power Electronics Texas Tech Hard Tube High Power Microwave Sources Ionospheric Heaters Electrical Breakdown in Liquids and Solids Pulsed Vacuum UV Generation The Surface Physics of Insulators Explosive Driven Pulsed Power Industrial Applications of Pulsed Power Technology Wide Bandgap Switch Development 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 ($2,300 - $2,600 monthly salary) for graduate study is for the most part obtained from Research Assistantships and Graduate Fellowships. For all supported students, most of the university tuition and fees are provided in addition to the graduate salary. The Pulsed Power and Power Electronics Research Program at Texas Tech University has generated approximately 120 theses and dissertations over HPM Flashover Studies the past ten years. Plasma, Power Electronics, and Pulsed Power related graduate courses offered include: Interaction of Arcs with Electrodes and Insulators Electromagnetic Field Theory Solid State Power Electronics Pulsed Power Technology Erosion Resistant Materials for Space Propulsion Gaseous Electronics Sub-nanosecond Pulsed Gas Breakdown High Power Microwave Sources Non-Equilibrium Plasmas Power Semiconductors Corona Formation and Mitigation Power Electronics Circuit and Rotating Machine Modeling Plasma Engineering Electromagnetic Launchers Laser Spectroscopy Electrical Space Propulsion Devices Machine Modeling and Control Laboratories and Support Facilities The current Electrical Engineering research building, almost exclusively devoted to pulsed power related research, was completed in 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 for sensitive research and investigations involving energetic materials in the off-campus research building. Off Campus Research Facility

6 The Center for Pulsed Power and Power Electronics 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. Dell PowerEdge Network Servers Equipment and Facilities 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 / eddy current field solver), 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. A number of sophisticated software tools such as LAMMPS, VASP, Gromacs, etc. are also available. Numerous high voltage D.C. power supplies Fluorescence detection system for CW and transient measurements Haas VF-3 vertical machining center with 4th axis Scanning electron and optical microscopes Double wall Faraday cages High voltage, high power loads Center for Pu Residual gas analyzers Marx generators (up to 2 MV) Magnetic coil systems and associated power supplies Febetron flash x-ray, 300 kev Haas VF-3 Closed cycle refrigeration system Line pulsers and PFN s Spectroradiometer Equipment and Facilities A sample of the equipment and facilities available includes: Pulsed high voltage, high current diagnostic equipment including conventional probes and optical detectors of electric fields Optical equipment, detectors, and spectrometers OMA systems for VUV-UV-VIS-NIR spectroscopy Pulsed and CW lasers with a wide range of wavelengths and power outputs Encrypted RF Transmissions Using a Pulsed, Phased Antenna Array Image converter streak and framing cameras with ps / ns temporal resolution 500 o C Bakeout Oven High power microwave equipment Dimension SST 1200es 3-D printer Microwave equipment Numerous vacuum stations Various large vacuum tanks FT IR-Spectrometer Microwave Interferometers Programmable pico-ammeter and voltage sources 26 foot shielded mobile diagnostic trailer Class 100,000 (ISO8) clean room Space simulation chamber Multiple explosive chambers Rotating prism and mirror framing cameras 50 GHz Oscilloscopes bock, TX Laboratory power capability: 500 kva single outlet; 1MVA Numerous spark gaps, rail gaps, ignitrons, thyratrons and solid state switches High potential testers Haas TL-1 tool room lathe Haas TM-1 tool room mill Haas GR-510 Gantry router 50 GHz 160 GSa/s Keysight Oscilloscope

7 Selected Journal Publications Texas Tech University, Lubbock Texas er & Power Electronics Texas Tech Selected Journal Publications (from 2015) V. Meyers, D. Mauch, J. Dickens, A. Neuber, Nonlinear UV Absorption Properties of Bulk 4H-SiC, Journal of Applied Physics 121, (2017). B. Esser, S. Beeson, J. Dickens, J. Mankowski, T. Antonsen, and A. Neuber, The Path to a Transportable Ionospheric Heater Tuning Methods, IEEE Transaction on Plasma Science, Special Issue - Plenary, Invited & Tutorial Papers from ICOPS 2016, (2017). Zhang, Z., M. Giesselmann, J. Mankowski, J. Dickens, A. Neuber, and R. P. Joshi. Evaluation of high field and/or local heating based material degradation of nanoscale metal emitter tips: a molecular dynamics analysis. Journal of Physics D: Applied Physics 50, no. 18 (2017). V Meyers, A R Chowdhury, D Mauch, J C Dickens, A A Neuber and R P Joshi, Analysis of intensity dependent near-bandedge absorption in semi-insulating 4H SiC for photoconductive switch applications, J. Phys. D: Appl. Phys. 50 (2017). A. Fierro, J. Stephens, S. Beeson, J. Dickens, and A. Neuber, Discrete Photon Implementation for Plasma Simulations, Phys. Plasmas 23, (2016). Atmospheric Breakdown Field Strength vs. RF Frequency Two Gap Lengths J. Stephens, A. Fierro, S. Beeson, G. Laity, D. Trienekens, R. P. Joshi, J. C. Dickens, and A. A. Neuber, Photoionization Capable, Extreme and Vacuum Ultraviolet Emission in Developing Low Temperature Plasmas in Air, Plasma Sources Sci. Technol., 25, , pp. 11, (2016). Lathing Set Up for High Explosive Machining A. R. Chowdhury, D. Mauch, R. P. Joshi, A. A. Neuber and J. Dickens, Contact Extensions Over a High- k Dielectric Layer for Surface Field Mitigation in High Power 4H SiC Photoconductive Switches, in IEEE Transactions on Electron Devices, vol. 63, no. 8, pp , Aug., (2016). P3E Testing the NLTL Array System J. Johnson, D. Reale, J. Krile, R. Garcia, W. Cravey, A. Neuber, J. Dickens, and J. Mankowski, Characteristics of a Four Element Gyromagnetic Nonlinear Transmission Line Array High Power Lifetime Spectroscopy Microwave Source, Review of Scientific Instruments 87, , (2016). S. Lacouture and S. Bayne, A 500 A device characterizer utilizing a pulsed-linear amplifier, Review of Scientific Instruments, 87, 2, (2016). J. A. Schrock, B. N. Pushpakaran, A. V. Bilbao, W. B. Ray, E. A. Hirsch, M. D. Kelley, S. L. Holt, and S. B. Bayne, Failure Analysis of 1200-V/150-A SiC MOSFET Under Repetitive Pulsed Overcurrent Conditions, IEEE Transactions on Power Electronics, vol. 31, no. 3, pp , Mar. (2016). D. V. Reale, J. M. Parson, A. A. Neuber, J. C. Dickens, and J. J. Mankowski, Investigation of a stripline transmission line structure for gyromagnetic nonlinear transmission line high power microwave sources, Review of Scientific Instruments 87, (2016). J. A. Schrock et al., Failure Modes of 15-kV SiC SGTO Thyristors During Repetitive Extreme Pulsed Overcurrent Conditions, IEEE Transactions on Power Electronics, vol. 31, no. 12, pp , Dec. (2016). J. Stephens, A. Fierro, D. Trienekens, J. Dickens, and A. Neuber, Optimizing drive parameters of a nanosecond, repetitively pulsed microdischarge high power nm source, Plasma Sources Science and Technology 24, (6pp) (2015). K. H. Becker et al., Robert Barker Memorial Session: Leadership in Plasma Science and Applications, in IEEE Transactions on Plasma Science, vol. 43, no. 4, pp , April, (2015). Electron Explosive Emission Studies of HPM Anodes D. H. Barnett, J. M. Parson, C. F. Lynn, P. M. Kelly, M. Taylor, S. Calico, M. C. Scott, J. C. Dickens, A. A. Neuber, and J. J. Mankowski, Optically isolated, 2 khz repetition rate, 4 kv solid-state pulse trigger generator, Rev. Sci. Instrum. 86, (2015).

8 The Center for Pulsed Power and Power Electronics J. M. Parson, C. F. Lynn, M. C. Scott, S. Calico, J. C. Dickens, A. A. Neuber, and J. J. Mankowski, A Frequency Stable Vacuum-Sealed Tube High-Power Microwave Vircator Operated at 500 Hz, Electron Device Letters, (2015). S. Lin, S. Beeson, C. Liu, J. Dickens, and A. Neuber, Self-Induced Gaseous Plasma as HPM Opening Switch Medium, accepted for publication in Physics of Plasmas, (2015). RF Breakdown in Atmospheric Air at 3 MHz S. Beeson, J. Dickens, and A. Neuber, A high power microwave triggered RF opening switch, Rev. Sci. Instrum., (2015). D. Mauch, W. Sullivan, A. Bullick, A. Neuber and J. Dickens, High Power Lateral Silicon Carbide Photoconductive Semiconductor Switches and Investigation of Degradation Mechanisms, IEEE Transactions on Plasma Science, vol. 43, no. 6, pp , June, (2015). Selected Journal Publications Center for Pu SiC Photoconductive Switches Electrical Insulation, vol. 22, no. 4, pp , Aug. (2015). J. A. Schrock, W. B. Ray, K. Lawson, A. Bilbao, S. B. Bayne, S. L. SEM Imaging of HPM Holt, L. Cheng, Carbon Fiber Cathodes J. W. Palmour, C. Scozzie, High- Mobility Stable 1200-V, 150-A 4H-SiC DMOSFET Long- Term Reliability Analysis Under High Current Density Transient Conditions, IEEE Transactions on Power Electronics, vol. 30, no. 6, pp , Jun. (2015). J. A. Schrock et al., High-Mobility Stable 1200-V, 150- A 4H-SiC DMOSFET Long-Term Reliability Analysis Under High Current Density Transient Conditions, IEEE Transactions on Power Electronics, vol. 30, no. 6, pp , Jun. (2015). C. F. Lynn, J. M. Parson, M. C. Scott, S. E. Calico, J. C. Dickens, A. A. Neuber, and J. J. Mankowski, Anode Materials for High-Average-Power Operation in Vacuum at Gigawatt Instantaneous Power Levels, IEEE Transactions on Electron Devices, 62, no (2015). S. Lin, H. Wang, Y. Li, C. Liu, N. Zhang, W. Cui and A. Neuber, Multipactor threshold calculation of coaxial transmission lines in microwave applications with nonstationary statistical theory, Phys. Plasmas 22, (2015). A. V. Bilbao, J. A. Schrock, W. B. Ray, M. D. Kelley, S. L. Holt, M. G. Giesselmann, and S. B. Bayne, Development and testing of an active high voltage saturation probe for characterization of ultra-high voltage silicon carbide semiconductor devices, Review of Scientific Instruments, 86, (2015). M. G. Giesselmann and A. Bilbao, Digital control of a rapid capacitor charger with sensor-less voltage feedback, IEEE Transactions on Dielectrics and bock, TX IR Snapshot of High Explosive Machining Process A. Majzoobi, R. P. Joshi, A. A. Neuber, and J. C. Dickens, Heating Based Model Analysis for Explosive Emission Initiation at Metal Cathodes, AIP Advances 5, , (2015). D. Mauch, C. Hettler, W. W. Sullivan, A. A. Neuber, and J, Dickens, Evaluation of a Pulsed Ultraviolet Light-Emitting Diode for Triggering Photoconductive Semiconductor Switches, IEEE Trans. Plasma Sci. 43, (2015). Material Ejection at Nanotip at High Electric Fields Local Heating R. Tiskumara, R. P. Joshi, D. Mauch, J. C. Dickens, and A. A. Neuber, Analysis of high field effects on the steady-state current-voltage response of semi-insulating 4H-SiC for photoconductive switch applications, J. Appl. Phys. 118, (2015).

9 er & Power Electronics Texas Tech J. M. Johnson, D. V. Reale, W. H. Cravey, R. S. Garcia, D. H. Barnett, A. A. Neuber, J. C. Dickens, and J. J. Mankowski. Material selection of a ferrimagnetic loaded coaxial delay line for phasing gyromagnetic nonlinear transmission lines. Review of Scientific Instruments 86, 8, (2015). A. Majzoobi, R. P. Joshi, A. A. Neuber, and J. C. Dickens, Particle-in-Cell Based Parameter Study of 12-Cavity, 12-Cathode Rising-Sun Relativistic Magnetrons for Improved Performance, AIP Advances 5, (2015). H. Qiu, R. P. Joshi, A. Neuber, and J. Dickens, A Model Study of the Role of Workfunction Variations in Cold Field Emission From Microstructures With Inclusion of Field Enhancements, Semicond. Sci. Technol. 30, (2015). Selected Journal Publications Texas Tech University, Lubbock Texas Breakdown VUV Spectroscopy at Atmospheric Pressures J. Stephens, A. Fierro, D. Trienekens, J. Dickens, and A. Neuber, Optimizing drive parameters of a nanosecond, repetitively pulsed microdischarge high power nm source, Plasma Sources Science and Technology 24, (6pp) (2015). Compact HPM Reflex-Triode Virtual Cathode Oscillator D. Trienekens, J. Stephens, A. Fierro, J. Dickens, and A. Neuber Time-discretized Extreme and Vacuum Ultraviolet Spectroscopy of Spark Discharges in Air, N2 and O2, Journal of Physics D: Applied Physics 49, 3, (2015). E. Rocha, P. M. Kelly, J. M. Parson, C. F. Lynn, J. C. Dickens, A. A. Neuber, J. J. Mankowski, T. Queller, J. Gleizer, and Y. E. Krasik. Evaluating the Performance of a Carbon-Epoxy Capillary Cathode and Carbon Fiber Cathode in a Sealed-Tube Vircator Under UHV Conditions, IEEE Trans. on Plasma Sci. 43, (2015). K. Eldridge, A. Fierro, J. Dickens, and A. Neuber A Take on Arbitrary Transient Electric Field Reconstruction Using Wavelet Decomposition Theory Coupled With Particle Swarm Optimization, IEEE Transactions on Antennas and Propagation, 64(7), pp (2016). A. R. Chowdhury, SiC Triggered Gap J.C. Dickens, A.A. Neuber, and R.P. Joshi, Assessing the role of trap-toband impact ionization and hole transport on the dark currents of 4H-SiC photoconductive switches containing deep defects, Journal of Applied Physics, 120(24), p (2016). M. B. Walls, A. Fierro, J. Dickens, J. Mankowski, and A. Neuber, A Variable Resistance Thyristor-Type Switch Modeling Technique, IEEE Transactions on Plasma Science, 44(9), pp (2016). A. Majzoobi, R.P. Joshi, A.A. Neuber, and J.C. Dickens, Numerical Assessment of Secondary Electron Emission on the Performance of Rising-Sun Magnetrons With Axial Output, IEEE Transactions on Plasma Science, 44(10), pp (2016). View inside of 10 MHz ESA

10 The Center for Pulsed Power and Power Electronics Selected Conference Proceedings ( ) E. Hirsch, J. A. Schrock, S. Lacouture, A. Bilbao, S. Bayne, M. Giesselmann, H. O Brien, A. Ogunniyi, Evaluation of Long Term Reliability and Safe Operating Area of 15 kv SiC PiN Diodes during Ultra-High Current Pulsed Conditions, in IEEE International Power Modulator and High Voltage Conference (IPMHVC), accepted for publication, 5-6 July A. V. Bilbao, J. A. Schrock, M. D. Kelley, E. Hirsch, W. B. Ray, S. B. Bayne, M. G. Giesselmann, Continuous Switching of Ultra-High Voltage Silicon Carbide MOSFETs, in IEEE International Power Modulator and High Voltage Conference (IPMHVC), accepted for publication, 5-6 July Selected Conference Proceedings Reflex-Triode Vircator HPM Source Center for Pu S. Lacouture et al., Extraction of Safe Operating Area and long term reliability of experimental Silicon Carbide Super Gate Turn Off Thyristors, in 2015 IEEE Pulsed Power Conference (PPC), Austin, TX, 2015, pp W. B. Ray, M. Kim, A. Bilbao, J. A. Schrock and S. B. Bayne, Analysis on repetitive pulsed overcurrent operation of GaN power transistors, 2016 IEEE 4th Workshop on Wide Bandgap Power Devices and Applications (WiPDA), Fayetteville, AR, 2016, pp J. A. Schrock, E. Hirsch, A. Bilbao, S. Lacouture, W. Ray, S. Bayne, M. Giesselmann, H. O Brien, A. Ogunniyi, Simulation and Design Trade-Off Analysis of 15 kv SiC SGTO Thyristor during Extreme Pulsed Overcurrent Conditions, in IEEE International Power Modulator and High Voltage Conference (IPMHVC), accepted for publication, 5-6 July V. Meyers, D. Mauch, J. Mankowski, J. Dickens, A. Neuber, Characterization of the Optical Properties of GaN:Fe for High Voltage Photoconductive Semiconductor Switch Applications, in 2015 IEEE Pulsed Power Conference, Austin, TX, 2015, pp kv Compact Curve Tracer 3D Magnetic Field Simulation Using FEM A. V. Bilbao, M. G. Giesselmann, and S. B. Bayne, Charge Transfer-based Sensorless Voltage Feedback in HV Capacitor Chargers, in IEEE International Power Modulator and High Voltage Conference (IPMHVC), accepted for publication, 5-6 July bock, TX A. A. Ogunniyi et al., Analysis of carrier lifetime effects on HV SIC PiN diodes at elevated pulsed switching conditions, in 2015 IEEE Pulsed Power Conference (PPC), Austin, TX, 2015, pp B. Esser, S. Beeson, J. Dickens, J. Mankowski and A. Neuber, Analysis of a tunable electrically small antenna, in 2015 IEEE Pulsed Power Conference (PPC), Austin, TX, 2015, pp Compact PFN Marx Generator HPM Cathode DC Plasma Discharge Cleaning

11 er & Power Electronics Texas Tech Research Projects Texas Tech University, Lubbock Texas Rapid Capacitor Chargers High Voltage SiC Switch Testbed Advanced Large Area Cathode Preparation

12 Center for Pulsed Power & Power Electronics Texas Tech University Lubbock, TX Faculty, Staff and Students