Production of high-contrast picosecond pulses in a Nd : glass laser system and their application for the generation of X-ray radiation in a high temperature plasma

摘要

A Nd : glass laser system with the additional selective devices based on electro-optical Pockels cells and fast-response deflectors makes it possible to produce Light pulses with a contrast not less than 10(6) by means of the amplification of chirped pulses. Focusing such laser pulses on a target, we were able to achieve an intensity of 10(17) W/cm(2), which provided an opportunity to produce a high-temperature plasma, which emitted both bremsstrahlung and Line radiation. The efficiency of energy conversion these processes reached several tenths of a percent. The efficiencies of energy conversion into X-ray emission are compared for shea (1.5 ps) and long (50 ns) pulses. Reasonable agreement between the experimental data and the results of numerical simulations is achieved. [References: 16]