关键词: 激光等离子体, 冲击波, 热烧蚀效应, 多光子非线性Compton散射

Abstract:

Using the multi-photon nonlinear Compton theory, the ablation effects to the solid irradiated by the high power laser-plasma punched wave under Compton scattering was studied, the formulas for the power density of the high power laser-plasma punched wave and the melted temperature of the ablation target material, boiling temperature and heating time were derived, and the optimum experimentation conditions for the target material ablation hole irradiated by the high power laser-plasma punched wave were obtained. The results show that the heat generation index of the solid has improved, temperature distribution is changed, and the needing time and power for the effort point reaching the temperatures of the melting and boiling decrease than that before the scattering. When the energy of the laser-plasma punched wave is 250J and the distance between the punched wave and target material surface is 70~80mm, the effect of the ablation hole of the punched wave to the target material surface is better. When the time is in 1.2~3.6ms and the distance between the punched wave and target material surface is 28~80mm, the ablation effect is better. When the energy density is in 400~2800J•cm^-2, the ablation depth almost increase bad linearly, and the dimension of the ablation speck is inversed ratio along with the power density.

Key words: Laser-plasma, Punched wave, Heat ablation effect, Multi-photon nonlinear Compton scattering