Advanced Stimulated Scattering Measurements in Supercritical Fluids
Abstract
Work was performed on development of stimulated Brillouin and Rayleigh scattering for measurements in supercritical fluids. Improvements were made to our instrumentation to fully resolve the stimulated Rayleigh scattering peak in the supercritical regime, a capability that is important for measurement of the thermal properties of supercritical fuels. To provide narrower linewidths, the injection-seeded laser has been modified to operate as a pulse-amplified system. A new electronic modulation technique has been developed to further improve our ability to measure the Rayleigh peak. This method used a single laser source, eliminating the drift problems of the two laser method and improving the frequency offset accuracy. Interesting structure was observed with stimulated Brillouin scattering in the supercritical regime indicating that the liquid-gas phase boundary continues above the critical point.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2006
- Accession Number
- ADA457760
Entities
People
- Gregory W. Faris
Organizations
- SRI International