Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Patent
1984-02-21
1985-10-08
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
G01N 2165
Patent
active
045456798
ABSTRACT:
A method for determining molecular vibrational frequencies in shock-compressed transparent materials. A single laser beam pulse is directed into a sample material while the material is shock-compressed from a direction opposite that of the incident laser beam. A Stokes beam produced by stimulated Raman scattering is emitted back along the path of the incident laser beam, that is, in the opposite direction to that of the incident laser beam. The Stokes beam is separated from the incident beam and its frequency measured. The difference in frequency between the Stokes beam and the incident beam is representative of the characteristic frequency of the Raman active mode of the sample. Both the incident beam and the Stokes beam pass perpendicularly through the shock front advancing through the sample, thereby minimizing adverse effects of refraction.
REFERENCES:
patent: 4398801 (1983-08-01), McWilliams et al.
Schmidt et al., Los Alamos Unclassified Report 83-901, presented at the Workshop on Shock-Compression Chemistry in Materials Synthesis and Processing, Battelle Conference Center, Seattle, Wa., Mar. 28-29, 1983.
Schmidt et al., Los Alamos Unclassified Report 83-1584, presented at the Conference on Shock-Waves in Condensed Matter, Santa Fe, NM, Jul. 18-21, 1983.
Moore et al., Los Alamos Unclassified Report 83-1854, presented at the IX AIRAPT Conference, Albany, NY, Jul. 25-29, 1983.
Schmidt et al., Los Alamos Unclassified Report 83-2847, presented at the CEA/Los Alamos High Explosives and Detonation Physics Conference, Paris, France, Oct. 3-6, 1983.
Maier et al., "Backward Stimulated Raman Scattering", Physical Review, vol. 177, No. 2, Jan. 10, 1969, pp. 580-599.
Keeler et al., "Stimulated Brillouin Scattering in Shock-Compressed Fluids", Physical Review Letters, vol. 17, No. 16, Oct. 17, 1966, pp. 852-854.
Bloom et al., "Stimulated Brillouin Scattering in Shock-Compressed Fluids", Journal of Applied Physics, vol. 45, No. 3, Mar. 1974, pp. 1200-1207.
Moore et al., Los Alamos Unclassified Report 83-1024, Apr. 7, 1983, also published in the Proceedings of the Los Alamos Conference on Optics '83.
Schmidt et al., "Backward Stimulated Raman Scattering in Shock-Compressed Benzene", Physical Review Letters, vol. 50, No. 9, Feb. 28, 1983, pp. 661-664.
Moore et al., Physical Review Letters, vol. 50, No. 22, May 30, 1983, pp. 1819-1822.
Schmidt et al., Los Alamos Unclassified Report 83-351, presented at the Ninth International Colloquium on Dynamics of Explosions and Reactive Systems, Poitiers, France, Jul. 4-8, 1983.
Moore David S.
Schmidt Stephen C.
Eklund William A.
Evans F. L.
Gaetjens Paul D.
Hightower Judson R.
The United States of America as represented by the United States
LandOfFree
Frequency shift measurement in shock-compressed materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency shift measurement in shock-compressed materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency shift measurement in shock-compressed materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2216931