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Title: Method and apparatus for determining pressure-induced frequency-shifts in shock-compressed materials

Abstract

A method and an apparatus for conducting coherent anti-Stokes Raman scattering spectroscopy in shock-compressed materials are disclosed. The apparatus includes a sample vessel having an optically transparent wall and an opposing optically reflective wall. Two coherent laser beams, a pump beam and a broadband Stokes beam, are directed through the window and focused on a portion of the sample. In the preferred embodiment, a projectile is fired from a high-pressure gas gun to impact the outside of the reflective wall, generating a planar shock wave which travels through the sample toward the window. The pump and Stokes beams result in the emission from the shock-compressed sample of a coherent anti-Stokes beam, which is emitted toward the approaching reflective wall of the vessel and reflected back through the window. The anti-Stokes beam is folded into a spectrometer for frequency analysis. The results of such analysis are useful for determining chemical and physical phenomena which occur during the shock-compression of the sample.

Inventors:
;
Issue Date:
OSTI Identifier:
6679871
Application Number:
ON: DE84014313
Assignee:
Dept. of Energy EDB-84-140308
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; IMPACT SHOCK; COMPRESSION; RAMAN SPECTRA; FREQUENCY ANALYSIS; DESIGN; MATERIALS; SPECTROSCOPY; SPECTRA 420200* -- Engineering-- Facilities, Equipment, & Techniques; 420500 -- Engineering-- Materials Testing

Citation Formats

Moore, D.S., and Schmidt, S.C. Method and apparatus for determining pressure-induced frequency-shifts in shock-compressed materials. United States: N. p., 1983. Web.
Moore, D.S., & Schmidt, S.C. Method and apparatus for determining pressure-induced frequency-shifts in shock-compressed materials. United States.
Moore, D.S., and Schmidt, S.C. Fri . "Method and apparatus for determining pressure-induced frequency-shifts in shock-compressed materials". United States.
@article{osti_6679871,
title = {Method and apparatus for determining pressure-induced frequency-shifts in shock-compressed materials},
author = {Moore, D.S. and Schmidt, S.C.},
abstractNote = {A method and an apparatus for conducting coherent anti-Stokes Raman scattering spectroscopy in shock-compressed materials are disclosed. The apparatus includes a sample vessel having an optically transparent wall and an opposing optically reflective wall. Two coherent laser beams, a pump beam and a broadband Stokes beam, are directed through the window and focused on a portion of the sample. In the preferred embodiment, a projectile is fired from a high-pressure gas gun to impact the outside of the reflective wall, generating a planar shock wave which travels through the sample toward the window. The pump and Stokes beams result in the emission from the shock-compressed sample of a coherent anti-Stokes beam, which is emitted toward the approaching reflective wall of the vessel and reflected back through the window. The anti-Stokes beam is folded into a spectrometer for frequency analysis. The results of such analysis are useful for determining chemical and physical phenomena which occur during the shock-compression of the sample.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {12}
}