DEVELOPMENT OF A LASER SYSTEM FOR ABSOLUTE ATMOSPHERIC DIFFUSION MEASUREMENT OF A GASEOUS TRACER MATERIAL.
Abstract
Results are reported of experiments designed to identify a gaseous tracer material for use in a laser system for real-time observation of atmospheric diffusion. Three possible mechanisms of interaction between light and gas molecules are discussed: resonance scattering, Rayleigh scattering, and fluorescence. Wavelength requirements connected with the resonance scattering approach require additional laser development. Successful application of the Rayleigh scattering technique awaits idenficiation of a gas with a Rayleigh scattering cross section near 10 to the (-21)st power cm. squared. The fluorescence approach is feasible at this time with hexafluoroacetone as the tracer gas and a nitrogen laser as the light source. Preliminary system design considerations are presented in an appendix. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1969
- Accession Number
- AD0709248
Entities
People
- Richard L. Gordon
- Todd Gilmore
- Walt Vali
Organizations
- Battelle Memorial Institute