The image of a nanosecond laser plasma in its own optical radiation

摘要

The results of experiments on the interaction of nanosecond laser radiation (wavelength of 1.06 μm and a radiation power density of 10~(12)-10~(13) W/cm~2) with targets from various materials (Cu, (C_2H_4)_n, TAC) are presented in the paper. In the experiments images of the plasma in own optical radiation in the wavelength range 0.4-1.1 μm were obtained. In one shot of laser images at wavelengths corresponding to the radiation of the harmonics 2ω_0, 3/2ω_0, 5/2ω_0, and at the frequency of laser radiation ω_0 were recorded. Using the obtained images the spatial characteristics of the radiating regions of the plasma, as well as the radiated energy for each of the harmonics, were estimated.