Accession Number : AD0638795

Title :   MEASUREMENT OF THE VELOCITY DISTRIBUTION FUNCTION OF A GAS USING A LASER.

Descriptive Note : Technical rept.

Corporate Author : STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Karamcheti,Krishnamurty ; koutsoyannis,Sotiris P. ; Kwok,Munson A. ; Rasmussen,Maurice L.

Report Date : MAY 1966

Pagination or Media Count : 78

Abstract : The problems associated with the measurement of the velocity distribution function of a gas using a laser are presented and discussed. A simple theoretical model relating the frequency variation of the absorption coefficient across a spectral line of a gas to the distribution function of velocities in the direction of propagation of a plane monochromatic wave is developed and applied to measurements of attenuation of a laser beam passing through the gas. Experimental results with a D.C. excited Neon gas and a He-Ne laser oscillating at 6328.2 A show that under certain experimental conditions agreement with theory is good. (Author)

Descriptors :   (*GASES, ATOMIC SPECTROSCOPY), (*KINETIC THEORY, DISTRIBUTION FUNCTIONS), LASERS, VELOCITY, MEASUREMENT, ATTENUATION, THEORY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE