Accession Number : AD0703009

Title :   LASER-INDUCED INSTABILITIES IN GASES: THERMALLY INDUCED MODIFICATIONS OF A HIGH POWER CW LASER BEAM.

Descriptive Note : Interim rept. no. 2, 31 Oct 68-1 Nov 69,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON D C

Personal Author(s) : Livingston,P. M.

Report Date : 01 NOV 1969

Pagination or Media Count : 49

Abstract : The problem of beam induced thermal modifications of a high-powered CW laser beam is considered. The extent and type of modification depend principally upon the nature of the medium (liquid or air), and whether an external flow field is present. These conditions determine the dominant heat loss mechanism operating in the fluid; forced convection, free convection, and diffusion, and thus the beam distortions. All three cases are analysed and figures presented, showing the type of distortion expected as determined within the framework of geometric optics. (Author)

Descriptors :   (*LASERS, LIGHT TRANSMISSION), (*LIGHT TRANSMISSION, GASES), DISTORTION, REFRACTIVE INDEX, CONVECTION(HEAT TRANSFER), DIFFUSION, STABILITY

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE