TRANSIENT CLARIFICATION OF A WATER AEROSO L IN THE CASE OF THERMAL-BLOOMING OF AN OPTICAL BEAM

The moisture approximation is used in a study of transient clearing of a water aerosol when droplets are evaporated by an intense laser beam in the presence of a cross wind. Coordinate distributions of the beam intensity and moisture are obtained between the moment at which the b eam begins to act and the attainment of a steady state. The dependence s of the intensity of the beam transmitted, aerosol medium on the scal ing parameters (representing aerosol evaporation or clarification, bea m attenuation and thermal blooming) are derived. A comparison is made with experimental and theoretical results obtained by other authors.