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Title: Frequency shift measurement in shock-compressed materials

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.

Inventors:
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865621
Patent Number(s):
4545679
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
frequency; shift; measurement; shock-compressed; materials; method; determining; molecular; vibrational; frequencies; transparent; single; laser; beam; pulse; directed; sample; material; direction; opposite; incident; stokes; produced; stimulated; raman; scattering; emitted; path; separated; measured; difference; representative; characteristic; active; mode; pass; perpendicularly; shock; front; advancing; minimizing; adverse; effects; refraction; stimulated raman; adverse effects; active mode; frequency shift; opposite direction; incident laser; raman scattering; laser beam; beam pulse; incident beam; direction opposite; sample material; single laser; shock front; shock-compressed materials; transparent material; beam produced; raman active; transparent materials; shift measurement; parent material; determining molecular; /356/

Citation Formats

Moore, David S., and Schmidt, Stephen C. Frequency shift measurement in shock-compressed materials. United States: N. p., 1985. Web.
Moore, David S., & Schmidt, Stephen C. Frequency shift measurement in shock-compressed materials. United States.
Moore, David S., and Schmidt, Stephen C. Tue . "Frequency shift measurement in shock-compressed materials". United States. https://www.osti.gov/servlets/purl/865621.
@article{osti_865621,
title = {Frequency shift measurement in shock-compressed materials},
author = {Moore, David S. and Schmidt, Stephen C.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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