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Polymeric-host sulforhodamine-B lasers: Doubled Nd:YAG pumped

Description: Solid-state dye lasers, pumped by a doubled Nd:YAG laser, were evaluated as a function of concentration, output coupler reflectivity and oscillator dimensions. A slope efficiency of up to 62% was achieved. A maximum irradiance of 59 MW/cm{sup 2} to the dye laser cavity was achieved. 7 refs., 2 figs., 4 tabs.
Date: January 1, 1991
Creator: Gettemy, D.J.; Hermes, R.E. (Los Alamos National Lab., NM (USA)) & Barnes, N.P. (National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center)
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Partner: UNT Libraries Government Documents Department
open access

Instability of a supersonic shock free elliptic jet

Description: This paper presents a comparison of the measured and the computed spatial stability properties of an aspect ratio 2 supersonic shock free elliptic jet. The shock free nature of the elliptic jet provides an ideal test of validity of modeling the large scale coherent structures in the initial mixing region of noncircular supersonic jets with linear hydrodynamic stability theory. Both aerodynamic and acoustic data were measured. The data are used to compute the mean velocity profiles and to provid… more
Date: January 1, 1990
Creator: Baty, R. S. (Sandia National Labs., Albuquerque, NM (USA)); Seiner, J.M. & Ponton, M.K. (National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center)
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Partner: UNT Libraries Government Documents Department
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Comparison of radiation shielding properties of materials for space exploration initiative

Description: Radiation transport calculations were performed using the Montecarlo Intranuclear Cascade Code LAHET in order to evaluate the shielding effectiveness of CH{sub 4} and CH{sub 2} materials compared with, Water, Aluminum, Iron and Lead. In addition, calculations were performed using the deterministic straight-ahead approximation code BRYNTRN for CH{sub 4}, CH{sub 2}, B,C, Al, Fe Ta, and Pb. The use of hydrogenous material is shown to be superior in its shielding properties of particle and energy s… more
Date: January 1, 1992
Creator: Divadeenam, M.; Snead, C. L. Jr.; Ward, T. E. (Brookhaven National Lab., Upton, NY (United States)) & Nealy, J. E. (National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center)
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Partner: UNT Libraries Government Documents Department
open access

Unique Signal mathematical analysis task group FY03 status report.

Description: The Unique Signal is a key constituent of Enhanced Nuclear Detonation Safety (ENDS). Although the Unique Signal approach is well prescribed and mathematically assured, there are numerous unsolved mathematical problems that could help assess the risk of deviations from the ideal approach. Some of the mathematics-based results shown in this report are: 1. The risk that two patterns with poor characteristics (easily generated by inadvertent processes) could be combined through exclusive-or mixing … more
Date: December 1, 2003
Creator: Baty, Roy Stuart (Los Alamos National Laboratory, Los Alamos, NM); Johnston, Anna Marie; Hart, Elizabeth (Utah State University, Logan, UT); White, Allan (NASA, Langley Research Center, Hampton, VA) & Cooper, James Arlin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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