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Dr. Reginald Exton

Research Physicist

Phone: 757-864-4605

Email:  reginald.j.exton@nasa.gov

Education:
  • B.S. Physics, University of Richmond (1958)
  • M.S. Physics, West Virginia Univ.(1961)
  • Ph.D. Physics, West Virginia Univ.(1972)
Research Activities:
  • Non-Intrusive Diagnostics
  • Plasma Aerodynamics (Plasma)
  • Spectral Line Shapes
  • Molecular Interactions
PUBLICATIONS:

Books:

  1. Exton, R. J., Ed., Spectral Line Shapes, Volume 4, A. Deepak (1987).

Book Citations:

  1. Bunkin, A. and Voliak, K.: Laser Remote Sensing of the Ocean, pp.85-89, Wiley, 2001.
  2. Demtroder, W.: Laser Spectroscopy, p. 97, Springer-Verlag, 1981.
  3. Breene, R. G.: Theories of Spectral Line Shape, p. 256, Wiley, 1981.
  4. Hirschfelder, J. O.: Intermolecular Forces, pp 357-8, Wiley, 1967.

Journal Articles:

  1. Exton, R. J.: Frequency of Instabilities Leading to Amplification and Damping in Boundary Layers. in preparation
  2. Exton, R. J.: Instability, Forcing and Transition.  AIAA Journal submitted
  3. Nikolic, M.; Popovic, S.; Vuskovic, L.; Herring, G. C.; and Exton, R. J.: “Electron Density Measurements in a Pulse-Repetitive Microwave Discharge in Air. Appl. Phys. Lett. Accepted
  4. Popovic, S.; Exton, R. J.; and Herring, G. C.: Transition from Diffuse to Filamentary Domain in a 9.5 GHz Microwave-Induced Surface Discharge. Appl. Phys. Lett. 87, 061502 (2005)
  5. Exton, R. J.; Popovic, S.; Herring, G. C.; and Cooper, M.:  Levitation using Microwave-Induced Plasmas.  Appl. Phys. Lett. 86, 124103 (2005).
  6. Exton, R. J.; and Balla, R. J.: ArF Laser Excitation, Collisional Transfer, and Quench-Free Fluorescence in I2/Foreign Gas Mixtures. JQSRT, 86, 267-283, 2004.
  7. Exton, R. J.; Balla, R. J.; Herring, G. C.; Popovic, S.; and Vuskovic, L.:  Volumetric Near-Field Microwave Plasma Generation. AIAA Paper 2003-4181
  8. Exton, R.J.; Balla, R. J.; Shirinzadeh, B.; Brauckmann, G. J.; Herring, G. C.: Kelliher, W. C.; Fugitt, J.; Lazard, C. J.; and Khodataev, K. V.: On-Board Projection of a Microwave Plasma Upstream of a Mach 6 Bow Shock. Physics of Plasmas, 8, 5013, 2001.
  9. Shirinzadeh, B.; Herring, G. C.; and Exton, R. J.: Examination of Anomalous Shock Velocities in Weakly Ionized Gases. AIAA Journal 39, 1210, 2001.
  10. Exton, R. J., (Magnum Opus), Correlation of Cs/Foreign Gas Diffuse Bands with Theoretical Interaction Potentials. JQSRT , 69, 723, 2001.
  11. Balla, R. J., and Exton, R. J.: Thermometry in Air by Optically Exciting the I2 Cordes Bands. Meas. Sci. Technol. 11, 1319-27, 2000.
  12. Balla, R. J., and Exton, R. J.: Density Measurements in Air by Optically Exciting the Cordes Bands of I2.  Meas. Sci. Technol. 11, 459-466, 2000.
  13. Exton, R. J.; Balla, R. J.; Shirinzadeh, B.; Hillard, M. E.; and Brauckmann, G. J.: Flow Visualisation Using Fluorescence From Locally Seeded I2 Excited by an ArF Excimer Laser. Experiments in Fluids, 26,  335-9, 1999.
  14. Shirinzadeh, B.; Hillard, M. E.; Balla, R. J.; Waitz, I. A.; Anders, J. B.; and Exton, R. J.: Planar Rayleigh Scattering Results in Helium-Air Mixing Experiments in a Mach-6 Wind Tunnel. Applied Optics, 31, 6529-34, 1992.
  15. Shirinzadeh, B.; Hillard, M. E.; and Exton, R. J., Condensation Effects on Rayleigh Scattering Measurements in a Supersonic Wind Tunnel. AIAA Journal, 29, 242-246, 1991.
  16. Exton, R. J., Hillard, M. E.; and Lempert, W. R.: Half Collision Analysis of Far Wing Diffuse Structure in Cs-Xe.  Journal of Physics B: Atomic & Molecular Physics, 20, L463-L467, 1987.
  17. Exton, R. J.; and Hillard, M. E.: Raman Doppler Velocimetry: A Unified Approach for Measuring Molecular Flow Velocity, Temperature, and Pressure.  Applied Optics, 25, 14-21, 1986.  [With Cover Photo]
  18. Exton, R. J.; Houghton, W. M.; Esaias, W.; and Hayward, D: Spectral differences and temporal stability of phycoerythrin fluorescence in estuarine and coastal waters due to the domination of labile cryptophytes and stable cyanobacteria.  Limnology and Oceanography, 28, 1225, 1983.
  19. Houghton, W. M.; Exton, R. J.; and Gregory, R. W.: Field Investigation of Techniques for Remote Laser Sensing of Oceanographic Parameters.  J. Remote Sensing of Environment, Vol. 13, 17-32, 1983.
  20. Exton, R. J.; Houghton, W. M.; Esaias, W.; Harriss, R. C.; Farmer, F. H.; and White, H. H.: Laboratory Analysis of Techniques for Remote Sensing of Oceanographic Parameters Using Laser Excitation.  J. Appl. Optics, 22, 541, 1983.
  21. She, C. Y.; Fairbank, W. M., Jr.; and Exton, R. J.: Measuring Molecular Flows with High-Resolution Stimulated Raman Spectroscopy.  IEEE J. Quantum Electronics, QE-17, 2, 1981.
  22. Tellinghuisen, J.; and Exton, R. J.: Quantum Simulation of the Yellow Emission Band of CsXe.  J. Phys, B, Atomic and Molecular, 13, 4781-4789, 1980.
  23. Tellinghuisen, J.; Pichler, G.; Snow, W. L.; Hillard, M. E.; and Exton, R. J.: Analysis of Bound-Free Fluorescence from Cs2 near 6100.  J. Phys. Chem., 50, 313-330, 1980.
  24. Exton, R. J.; Snow, W. L.; and Hillard, M. E.: Laser Excited Fluorescence in the Cesium-Xenon Excimer and the Cesium Dimer.  JQSRT 20, 235, 1978.
  25. Exton, R. J.; and Snow, W. L.: Line Shapes (Absorption Coefficients) for Satellites and Inversion of the Data to Obtain Interaction Potentials.  JQSRT,  20, 1, 1978.
  26. Exton, R. J.: Cesium Oscillator Strengths Measured with a Multiple-Path- Length Absorption Cell.  JQSRT,  16, 309, 1976.
  27. Exton, R. J.: Comment on Resonance Broadening.  JQSRT 15, 1141, 1975.
  28. Duoda, B. E.; and Exton, R. J.: Optically Thick Line Widths in Pyrotechnic Flares.  JQSRT, 15, 615, 1975.
  29. Exton, R. J.: Widths of Optically Thick Lines.  JQSRT 11, 1377, 1971.
  30. Exton, R. J.: Application of Photographic Pyrometry to Ablation Models.  AIAA Journal 7, 2262, 1969.
  31. Exton, R. J.: Doublet Suppression in the Principal Series of Cesium.  Physical Review 177, 114, 1969.
  32. Exton, R. J.: A Variable Exposure Photographic Pyrometer.  ISA Transactions 4, 365, 1965.
  33. Exton, R. J., and Houghton, W. M.: Portable Survey Spectrograph.  Rev. Sci. Inst. 35, 1370, 1964.
  34. Jefimenko, O.; and Exton, R. J.: Absorption Spectrum of Cs in the Presence of Isomeric Hydrocarbons.  Jour. Chem. Phys. 39, 229, 1963.
  35. Jefimenko, O.; and Exton, R. J.: Satellite Bands Near High Members of the Cs Absorption Spectrum.  Bull. Amer. Phys. Soc. 23, 49, 1963.
  36. Jefimenko, O.; and Exton, R. J.:  Effects of Atomic Interactions on the Spectra of Gaseous Mixtures.  Proc. Of  West Va, Acad. of  Sci. 31,  62, 1959.

Referenceable Oral Presentations:

  1. Exton, R. J.; Balla, R. J.; Herring, G. C.; Popovic, S.; and Vuskovic, L.: Volumetric Near-Field Microwave Plasma Generation.  Presented at the 34th AIAA Plasma Dynamics and Lasers Conference, 23-25 June, 2003, Orlando, Florida. [AIAA-2003-4181]
  2. Exton, R. J.:  Plasma-Assisted Aerodynamics and Combustion.  Presented at the Joint NASA/DOD RLV/SOV Airframe Technology Review, 19-22 Nov. 2002, NASA Langley Research Center.
  3. Exton, R. J.; Balla, R. J.; Shirinzadeh, B.; Hillard, M. E.; and Brauckmann, G. J.: Wake Imaging in Supersonic Facilities Using the Iodine Cordes Bands.  AIAA 98 – 2697, June 1998.
  4. Exton, R. J.: On-Board Generation of a “Precursor” Microwave Plasma at Mach 6: Experiment Design.  1st Workshop on Weakly Ionized Gases (AF Academy), June, 1997.
  5. Exton, R. J.: Absorption, Scattering and Fluorescence Techniques for Hypersonic Flow Measurements.  New Trends in Instrumentation for Hypersonic Research – A. Boutier (Ed.) Kluwer 1993.  Apr. 1992.  (NATO Workshop and Book)
  6. Exton, R. J.: Nonintrusive Spectroscopic Techniques for Supersonic/Hypersonic Aerodynamics and Combustion Diagnostics.  International Council for Aeronautical Sciences (ICAS) – Beijing, Sept. 1992.
  7. Shirinzadeh, B.; Balla, R. Jeffrey; Hillard, M. E.; Anders, J. B.; Exton, R. J.; and Waitz, I. A.: Study of Rayleigh Scattering for Visualization of Helium-Air Mixing at Mach 6.  14th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF), Rockville, Md., Oct. 1991.
  8. Shirinzadeh, B., Hillard, M. E.; Blair, A. B.; and Exton, R. J.:  Study of Cluster Formation and Its Effects on Rayleigh and Raman Scattering Measurements in a Mach 6 Wind Tunnel.  AIAA 2nd Fluid Dynamics, Plasma Dynamics & Lasers Conference, Honolulu, HI,  June, 1991. [AIAA 91-1496]
  9. Shirinzadeh.; Hillard, M. E.; and Exton, R. J.:  The Impact of Condensation Effects on Rayleigh Scattering Measurements in a Mach 6 Wind Tunnel.  9th NASP Technology Symposium, Orlando, FL, Nov. 1990.
  10. Exton, R. J.:  Raman Velocimetry.  Invited Paper presented at the 4th Gordon Research Conference on the Physics and Chemistry of Laser Diagnostics in Combustion, Plymouth, New Hampshire, July 13-17, 1987.
  11. Exton, R. J.; Hillard, M. E.; Lempert, W. R.; Covell, P. F.; and Miller, D. S.:  Invited Paper: Molecular Flow Velocity Using Doppler Shifted Raman Spectroscopy. Presented at the AIAA 22nd Thermophysics Conference, Honolulu, Hawaii, June 8-10, 1987.
  12. Exton, R. J.; Hillard, M. E.; and Lempert, W. R.:  Laser Excitation of Far-Wing Diffuse Structure—Cesium/Xenon Half Collisions.  8th International Conference on Spectral Line Shapes, Williamsburg, VA, June 9-13, 1986.
  13. Exton, R. J.; and Hillard, M. E.:  Forward and Backward Scattered Line Shapes in Stimulated Raman Spectroscopy.  Spectral Line Shapes, Ed. B. Rostas, Chp. IV, p. 341.  Proceedings, Seventh International Conf., Aussois, France, June 11-15, 1984.
  14. Exton, R. J.; Pichler, G.; and Tellinghuisen, J.:  Structured Continuum in the Fluorescence Spectra of Cs2, Spectral Line Shapes, Ed. B. Wende, Chp. VIII, p. 983-995. Proceedings, Fifth International Conf., Berlin, July 7-11, 1980.
  15. Moeller, M. B.; Exton, R. J.; Snow, W.; and Tellinghuisen, J.:  Analysis of Absorption and Bound-Free Fluorescence in the Cesium Dimer.  Molec. Spectros. Symp., Columbus, Ohio, June, 1978.
  16. Exton, R. J.; and Snow, W. L.:  Absorption Coefficients for Satellites in Cesium/Foreign Gas Mixtures.  3rd ICSLS, London, Sept. 13-17, 1976.
  17. Douda, B. E.; and Exton, R. J.:  Optically Thick Line Widths in Pyrotechnic Flares.  2nd ICSLS, Eugene, Oregon, 1974.
  18. Exton, R. J.:  Intensity Relations and Satellite Studies in the Spectra Resulting from Alkali/Foreign Gas Interactions.  1st ICSLS, Knoxville, Tennessee, Aug. 18-Sept. 1, 1972.

Others:

  1. Drummond, J. P. et al. (13):  Hypersonic Airbreathing Propulsion – An Aerodynamics, Aerothermodynamics, and Acoustics Competency White Paper, NASA/CDTM-10037, July 2001.
  2. Herring, G. C., South, B. W., Exton, R. J.:  Apparatus for Translating the Sample Volume of a Coherent Raman Doppler Velocimeter Using Crossed and Counterpropagating Laser Beams.  NASA Tech Brief, Vol. 18, 41-42, 1994.
  3. Shirinzadeh, B.; Balla, R. J.; Hillard, M. E.; Brauckmann, G. J.; and Exton, R. J.:  Nonintrusive Flow Field Measurements at Mach 6 on the NASP Model 201.  NASP TM-1170 (Secret), Aug. 1993.
  4. Exton, R. J.:  Nonintrusive Spectroscopic Techniques for Supersonic/Hypersonic Aerodynamics and Combustion Diagnostics. Invited presentation given at the Aerospace Engineering School at the University of Osaka Prefecture, Oct. 1, 1992.
  5. Shirinzadeh, B.; Balla, R. J.; Hillard, M. E.; Brauckmann, G. J.; and Exton, R. J.:  Nonintrusive Flow Field Measurements on the NASP Model 201 at Mach 6.  NASP Conference Proceedings – Monterey, Calif., Apr. 21, 1992.  IN 92 – 1188NASP (Secret).
  6. Exton, R. J.:  Gas Flow Diagnostics.  NASP/NASA Technology Workshop (Materials and Instrumentation), Langley Research Center, March 24-25, 1992
  7. Shirinzadeh, B.; Hillard, M. E.; and Exton, R. J.:  The Impact of Condensation Effects on Rayleigh Scattering in a Mach 6 Wind Tunnel.  NASP Technical Memorandum 1102, May 1990.
  8. Exton, R. J.:  Coherent Raman Diagnostic Techniques for Flow Velocity.  Pressure and Temperature, Engineering Sciences Division, Harwell, U.K., Aug. 5, 1988.
  9. Exton, Reginald J.;  Hillard, M. E.; and Lempert, W. R.:  Velocity, Temperature, and Pressure Measurements in Supersonic Wind Tunnels Using Stimulated Raman Scattering.  Presented (by W. R. Lempert) to the Princeton University Department of Mechanical and Aerospace Engineering Seminar Series, Princeton University.  Oct. 1985.
  10. Exton, R. J.; and Hillard, M. E.:  Molecular Velocimetry Using Stimulated Raman Spectroscopy.  NASA TM-85808, May, 1984. 
  11. Exton, R. J.; and Houghton, W. M.: Laser Remote Sensing of Marine Sediment Load and Algal Pigments:  Laboratory Experiments.  Chesapeake Bay Plume Study.  NASA CP 2188, Aug. 1981.
  12. Exton, R. J.:  Lidar Technology:  Present and Future (paper 11.4), Oceanic Lidar.  NASA CP 2194, Aug. 1981.
  13. Exton, R. J.: Laser Remote Sensing of Sediment Load and Algal Pigments, (paper 1.6), Oceanic Lidar.  NASA CP 2194, Aug. 1981
  14. Exton, R. J.:  An Ultraviolet Video Technique for Visualization of Stack Plumes and for Measuring Sulfur Dioxide Concentrations and Effluent Velocity.  NASA TP 1014, Sept. 1977.
  15. Sova, J. A.; Crews, John H., Jr.; and Exton, R. J.:  Fatigue Crack Initiation and Growth  in Notched 2024-T3 Specimens Monitored by a Videotape System.  NASA TN D-8224,  Aug. 1976.
  16. Exton, R. J.; and Gregory, R. W.:  A Four Channel, Portable Solar Radiometer for Measuring Particulate/Aerosol Opacity, NO2 and SO2 in Stack Plumes.  NASA TN D-8182, June 1976.
  17. Exton, R. J.:  Intensity Relations and Satellite Studies in the Spectra Resulting from Alkali/Foreign Gas Interactions.  Ph.D. Dissertation, West Virginia University, May, 1972.
  18. Snow, W. L.; and Exton, R. J.:  Development of a Relative Spectral Line Intensity Pyrometer Using Narrow Band Filters.  Langley W. P. 598, May 1968.
  19. Exton, R. J.:  Theory and Operation of a Variable Exposure Photographic Pyrometer Over the Temperature Range 1800 to 3600 F (1255 to 2255 K). NASA TN D-2660, March 1965.

Inventions, Patents Held:

  1. 6,543,935 Method and System for Instantaneously Determining the Temperature for a Low Density Gas Using Ensemble Ratioing of Laser-Induced Fluorescence Peaks, Apr. 8, 2003. (With Balla, R. J.)
  2. 4,624,561, Vibration-Free Raman Doppler Velocimeter,  Nov.25, 1986.
  3. 4,063,282, TV Fatigue Crack Monitoring System,  Dec.13, 1977.
  4. 3,931,462, Stack Plume Visualization System,  Jan.6, 1976.
  5. 3,493,309, Spectrograph Alignment System, Feb.3, 1970.

 

   
 
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