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:
-
- Los Alamos, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 865621
- Patent Number(s):
- 4545679
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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 = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}