Consulting

Alpha-Omega provides consulting services in the following areas:

  • High Voltage - Pulsed Power Design and Analysis
  • Signal Processing and Analysis
  • High Voltage - Pulsed Power Measurements and Diagnostics Design
  • High Voltage - Pulsed Power System Troubleshooting
  • High Voltage - Pulsed Power Controls

W. Ray Cravey, President. Mr. Cravey received his Masters degree in Electrical Engineering from Texas Tech University in 1989. Mr. Cravey has worked many years successfully managing projects from development through product phase. Mr. Cravey worked for 5 years in the field of pulsed power as a research engineer for Lawrence Livermore National Laboratory. Mr. Cravey was Chief Engineer for Tetra Corporation before starting Alpha-Omega Power Technologies. Mr. Cravey has published several papers in his field. Mr. Cravey prides himself on the quality and workmanship of the numerous projects he has managed over the years.  Mr. Cravey currently holds 2 patents in the field of electronics.

RESUME

General Manager 1997-PRES
Alpha-Omega Power Technologies, LLC.

Albuquerque, New Mexico Owner and General Manager of Alpha-Omega Power Technologies.

Chief Engineer 1996 - 1997
Tetra Corporation

Albuquerque, New Mexico

Head of Engineering Department. Responsible for management of all engineering at Tetra Corporation including program management office. Responsible for writing proposals and producing costing for all engineering work at Tetra. Responsible for managing all programs within schedule and budget. Responsible for presenting Department cash flow projections to President and vice-president of Company along with detailed program progress. Also responsible for dealing with customers including sales presentations and progress presentations and reports.

Principle Investigator for the development of a magnetically coupled rotating interface (MCRI). Responsible for the design, analysis, and marketing of a rotating interface capable of several Megabit data transfer rate across rotating and fixed interfaces (slip-ring replacement).

Principle Investigator for the development of a Microstack insulator for use on the DARHT linear induction accelerator for Los Alamos National Laboratory. The vacuum insulator is capable of withstanding electric fields of greater than 300 kV/cm.

Project engineer for the development of a linear pseudospark switch (LPSS). Responsible for the design of several switches including the hollow anode and cathode structures. Designed the test bed for the switch which generated 137 kA, 40 kV pulses. Responsible for the program layout and management.

Project engineer for XeCl laser modulator. Responsible for the design of a 400 Hz, 30 kV, 26 kA, 20 kW average power modulator for driving an excimer laser system. The modulator was designed to have a life of greater than 1010 shots. Magnetic compression was used in the system to reduce requirements on switch tube.

Project engineer for Tetra's coil gun program. Responsible for the design and testing of all pulsed power components, including 30, 15 kV, 200 kA solid dielectric switches and drivers. Responsible for design and calibration of all diagnostics and data acquisition hardware. Developed a computer model based on Nagaoka's formula for calculating the mutual inductance between the coil and projectile as a function of distance.

Lawrence Livermore National Laboratory 1989 - 1994
Livermore, California

Principal Investigator for Compact Source Development project and Alternative Refrigerant Testing Project. Developing compact sources around MOSFET switches in the 25 kV, 12 kW range. Utilizing surface mount technology and high density capacitors to obtain high power density.

Project Engineer for nuclear testing project that required a pulsed power system to drive a magnetic lens for a Compton electron spectrometer. Made accurate measurements of magnetic field. Led and conducted the field testing exercise at EG&G, Santa Barbara.

Responsible for developing an experiment to determine the repetitive operation, voltage hold-off recovery, and pulse repeatability of High Pressure Gas Switch (HPGS). Successfully made needed measurements on HPGS to characterize the switch. Analyzed and reduced data and made recommendations for future work.

Developed a 1 kHz, 1 nanosecond, 30 kV pulsed power source for wide-band upset testing of foreign assets. Tests were conducted in the anechoic test chamber at Lawrence Livermore National Laboratory.

Project Engineer for development of 1 ns, 100 kV, 100 Hz pulser used to drive LP antenna for the Combined Community Measurement Program Responsible for setting up transformer for use at Nevada Test Site. Responsible for interpreting diagnostics signals and machine performance. The experiment was highly successful.

Design of a 5 MV upgrade to the present 2 MV accelerator at Lawrence Livermore National Laboratory. Designed and modeled 5 MV insulator stack using TOPAZ2D electrostatics code.

Texas Tech University 1986 - 1988
Lubbock, Texas

Project Engineer for the Center for Applied Research and Engineering. Work included design and construction of a 5 kA, 500 kV modulator.

Worked as a research assistant in the Pulsed Power Conditioning Laboratory. Conducted research on improving the rise time of a PFN by pulse altering techniques. Also conducted experiments in the area of energy recovery for a pulse forming network.

Physics International Summer 1986
San Leandro, California

Assisted the design of a modulator and pre-pulse modulator for a high energy pulsed power system as a summer intern at Physics International. Also,

Professional Membership

Member of Tau Beta Pi Engineering Honor Society, Eta Kappa Nu Electrical Engineering Honors Society, Phi Theta Kappa Honor Society, and the Institute of Electrical and Electronics Engineers.

Education

  • 8/87 - 12/88 M.S. in Electrical Engineering, Texas Tech University
  • 9/84 - 5/87 B.S. in Electrical Engineering, Texas Tech University

 

Publications and Other Papers

Performance of a High Current, Low Pressure Hydrogen Radial Pseudospark Switch, W. R. Cravey, G. L. Devlin, M. E. Savage, W. W. Simpson, 11th IEEE Pulsed Power Conference, 1997.

Investigation of a High Voltage Vacuum Insulator for the DARHT Accelerator, W. R. Cravey, G. L. Devlin, C. S. Mayberry, J. N. Downing, 11th IEEE Pulsed Power Conference, 1997.

Design and Testing of a 25-stage Electromagnetic Coil Gun, W. R. Cravey, G. L. Devlin, E. L. Loree, S. T. Strohl, C. M. Young, 10th IEEE Pulsed Power Conference, 1995.

A High Current, High Voltage Switch: the Linear Pseudospark, J. Lehr, C. M. Young, and W. R. Cravey, 10th IEEE Pulsed Power Conference, 1995.

Picosecond High Pressure Gas Switch Experiment, W.R. Cravey, E.K. Freytag, D.A. Goerz, P.A. Pincosy, and P. Poulsen, 9th IEEE Pulsed Power Conference, 1993.

A FET Switched Induction Accelerator Cell, H.C. Kirbie, W.R. Cravey, S.A. Hawkins, M.A. Newton, Craig Ollis, 9th IEEE Pulsed Power Conference, 1993.

SPICE Modeling of a FET-Switched Induction Accelerator Cell, C. W. Ollis, W.R. Cravey, S.A. Hawkins, H.C. Kirbie, and M.A. Newton, 9th IEEE Pulsed Power Conference, 1993.

Testing of CFC Replacement Fluids for Arc-Induced Toxic By-Products, W. R. Cravey, Ruth Hawley-Fedder, Linda Foiles, and Wayne Ludetka, Microwave and Pulsed Power Thrust Area Report, 1993.

A Picosecond High-Pressure Gas Switch, W.R. Cravey, P. Poulsen, and P. Pincosy, Lawrence Livermore National Laboratory, Livermore, CA 94550, 1992.

High-Pressure Gas Switch for a Wideband Source, P. Poulsen, P. Pincosy, and W.R. Cravey, Lawrence Livermore National Laboratory, Livermore, CA 94550, 1992.

Performance of a 10 kV, 625 kA, 85 kJ, Energy Discharge Module Utilizing a Solid Dielectric Switch, R.A. Richardson, W.R. Cravey, and D.A. Goerz, Lawrence Livermore National Laboratory, Livermore, CA 94550, 1992.

A 150 kV, 2.5 ns, 100 Hz Blumlein Pulser, W.R. Cravey, E.K. Freytag, and K.S. Leighton, Lawrence Livermore National Laboratory, Livermore, CA 94550, 1990.

A Hybrid Pulse Forming Technique, W.R. Cravey, Lawrence Livermore National Laboratory, Livermore, CA 94550, W.M. Portnoy and T.R. Burkes, Texas Tech University, Lubbock, Texas  79409, 1990.

New Broadband Pulsed High Voltage Monitor, W.R. Cravey, Bob Anderson, Paul Wheeler, Dave Kraybill, Nicole Molau, and Deborah Wojtowicz, Lawrence Livermore National Laboratory, Livermore, CA  94550, 1989.

Design of Repetitive Very High Voltage Pulse Forming Networks of Short Duration, W.R. Cravey* and T.R. Burkes, Texas Tech University, 1989.

THANATOS Design and Analysis, W.R. Cravey, et al, Technical Report submitted to Los Alamos National Laboratory, 1988.

A New Generator of Repetitive High Power Pulse Modulators, W.R. Cravey, K.W. Harris, T.C. Cavazos, and G.G. McDuff, Texas Tech Research Foundation, 1988.

Test and Evaluation. Alpha-Omega Power Technologies develops a test and evaluation procedure for each product which is approved by the customer. Each unit must pass final evaluation as deemed by the customer.

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