Accession Number : ADA246368


Title :   Linear and Non-Linear Response of Liquid and Solid Particles to Energetic Radiation


Descriptive Note : Final rept.,


Corporate Author : NEBRASKA UNIV LINCOLN


Personal Author(s) : Alexander, Dennis R ; Barton, John P


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a246368.pdf


Report Date : 11 Mar 1991


Pagination or Media Count : 441


Abstract : The principal purpose of the research is to investigate the linear and non-linear laser interaction with small aerosols and solid particles. Experimental work is devoted to excimer laser beam interaction with small droplets of water, methanol, and fog oil at irradiances up to 200 GWatts/cm2. Also of interest in this research is the interactions with solid particles including A12O3, SiC, glass spheres, A1 spheres, CaF2 and W particles at both atmospheric and reduced pressures. Special attention is given to understanding the dynamics of the interaction processes by using a fast streak camera and excimer laser imaging. Jointly with the experimental work is the problem of understanding the electromagnetic interaction of focused laser beams with matter. Emphasis is given to developing computer codes to calculate internal and near electromagnetic fields for plane/focused laser beams incident upon spheres. Another phase of this investigation is devoted to theoretical modeling the laser imaging system used to obtain nanosecond time scale shadow images of exploding droplets. In addition, theoretical models for both polarized and unpolarized particle thermometry are developed.


Descriptors :   *COMPUTER PROGRAMS , ELECTROMAGNETIC FIELDS , RADIATION , AEROSOLS , MODELS , INTERACTIONS , DYNAMICS , WATER , THEORY , EXPLOSIONS , OPTICAL IMAGES , GLASS , SPHERES , SOLIDS , LASERS , LASER BEAMS , REDUCTION , TIME , NONLINEAR SYSTEMS , PARTICLES , RESPONSE , SCALE , INTERNAL , ELECTROMAGNETIC RADIATION , RADIANCE , METHANOLS , LINEARITY , IMAGES , DROPS , FOCUSING , BAROMETRIC PRESSURE , ENERGETIC PROPERTIES , MINERAL OILS , EXCIMERS , NEAR FIELD , SHADOWS , STREAK CAMERAS , LINEAR SYSTEMS


Subject Categories : Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE