Experimental Studies on Supercritical Flows
Abstract
Stimulated scattering was performed with infrared lasers at 1064 nm and with a ring dye laser at 532 nm. For the measurements at 1064 nm, a Nd:YAG laser was used as the pump laser and a tunable diode laser was used as the probe laser. With this apparatus stimulated Brillouin and stimulated Rayleigh scattering were observed in hexane and other liquids. These were the first high resolution stimulated scattering performed without a ring dye laser and the first stimulated scattering gain spectroscopy in the infrared to our knowledge. Both electrostrictive and absorptive versions of Brillouin and Rayleigh scattering were obtained. The transition from electrostrictive to absorptive Rayleigh scattering was observed for the first time to our knowledge. The influence of scattered pump light was determined not to be a problem for our measurements. A supercritical cell was designed and constructed capable of operation up to 600 K and 2000 psi. A second generation cell was built to reduce the effects of convection at the windows. The first stimulated scattering measurements in a supercritical fluid were performed.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2000
- Accession Number
- ADA378367
Entities
People
- Gregory W. Faris
Organizations
- SRI International