Education
1967
- Ph.D., Aerospace Engineering and Physics, The University of Florida.
1963
- MSE, Aerospace Engineering and Physics, The University of Florida.
1962
- BES, Engineering Sciences, The University of Florida.
Research
-
Spectroscopy:
Photographic and photometric experimental methods from VUV to IR,
particularly plasma spectroscopy; laser induced fluorescence
spectroscopy; and laser optogalvanic spectroscopy.
-
Lasers:
Laser sustained plasmas, both theoretical and experimental;
laser-target interactions, primarily experimental; infrared laser
photo-chemistry and isotope separation, both theoretical and
experimental.
-
Plasmas:
Plasma opening switches, cable guns, railgun plasma armatures,
electrodeless plasmas, laser sustained plasmas; laser discharges;
arc-jets and ion engines.
-
Fluid
Mechanics: MHD computational simulations, theoretical modeling of flows
in laser sustained plasmas, electrodeless arcs and arcjets, flows of
rarefied gases, flows in railgun plasma armatures, theoretical analysis
of boundary layer flows in electrodeless arcs; propagation of laser
supported combustion waves; theoretical modeling of gun muzzle blasts;
modeling of room response to blast waves; experimental determination of
atmospheric pressure waves associated with solar eclipse.
Selected Publications
- "Laser Thermal Propulsion Using Laser sustained
Plasmas," D.Keefer, San-Mou Jeng and R. Welle, Acta
Astronautica, Vol. 15, No. 6/7, pp. 367-376, 1987.
- "Laser Sustained Plasmas," D. Keefer, Chapter 4,
Laser-Induced Plasmas and Applications, pp. 169-206, edited
by Leon J. Radziemski and David A. Cremers, Marcel Dekker,
Inc., 1989.
- "Absolute Doppler shift calibration of laser induced
fluorescence signals using optogalvanic measurements in a
hollow cathode lamp," W.M. Ruyten and D. Keefer, Appl. Phys.
Lett., Vol. 61, No. 8, 880-882 (1992).
- "Two-Beam Multiplexed Laser Induced Fluorescence
Measurements of an Argon Arcjet Plume," W.M. Ruyten and D.
Keefer, AIAA Journal, Vol. 31, No. 11, 2083-2089 (1993).
- "Radiation Transfer Computation in Cylindrical Arc
Columns Using a Monte Carlo Method," T.H. Gogel, A.
Sedghinasab, and D. Keefer, Journal of Quantitative
Spectroscopy and Radiative Transfer, Vol. 52, No. 2,
179-194, (1994).
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