The effect of electronic halos on the scattering properties of solid particles in the microwave range
S.F. Balandin1, V.A. Donchenko2, V.F. Myshkin3, I.I. Pavlov4, V.A. Pogodaev1, V.L. Khazan5, V.A. Khan1,3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Siberian Physical-Technical Institute of the Tomsk State University, Tomsk, Russia
3National Research Tomsk Polytechnic University, Tomsk, Russia
4Siberian State University of Telecommunications and Information Sciences, Novosibirsk, Russia
5Omsk State Technical University, Omsk, Russia
Keywords: microparticle, laser radiation, heating, laser breakdown, thermal emission, conductivity, microwave reflection
Abstract
Physical processes occurring in aerodisperse media with solid particles in a laser channel during thermal emission of electrons from the particle surface and primary optical breakdown are considered. Estimates of the change in the refractive index during the formation of plasma halos around radiation-heated microparticles are given. The possibility of weak ionization of the air medium at a distance of several centimeters from the breakdown site is shown, due to the ionization of NO molecules and the course of a number of thermochemical reactions.
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