The Study of Plasma Formed by Ultrashort Laser Pulses

摘要

Processes occurring during high-temperature heating of plasmas have been studied experimentally by focusing laser emission of ultrashort duration on the surface of lithium deuteride. Experiments included the shadow photography of plasma with illumination by ultrashort pulses and the photo-registration of the dispersion of plasma with the aid of an image inverter, as well as the time dependence of laser pulse reflection and the measurement of the electron temperature of plasma with respect to its X-ray radiation. The basic processes which accompany the heating of plasma by ultrashort pulses are examined theoretically within the framework of approximations based upon the results of experiments. (Author)