Influence of initial phase on radiation characteristics of electrons driven by non-tightly focused laser

Abstract

Based on the classical Thomson scattering theory, a model of the interaction between a single electron and a periodic order linearly polarized Gaussian laser pulse is constructed and simulated by MATLAB. The effect of the initial phase on the distribution of space energy radiation is studied. The results show that the distribution characteristics of electron motion and energy radiation show spatial asymmetry with respect to the initial phase under the condition of non-tightly focused pulse. Specifically, the transverse motion and energy radiation distribution of electron are affected by the initial phase, resulting in a longitudinal drift. The spatial distribution of energy radiation shows obvious spatial asymmetry with respect to the initial phase, and its energy asymmetry coefficients are periodic symmetric with respect to the initial phase, and the reciprocal transformation relationship with π interval is presented. Then, we explored the influence of the laser pulse width and the initial phase on the asymmetry coefficient of the radiation energy and found that the distribution of the asymmetry coefficient on the initial phase of the radiation changes continuously clockwise with the increase of the laser pulse width.

Application of laser rust removal technology in the field of ships

“…Wang Zhixin has shown through research that before the laser energy is insufficient to completely remove the surface rust of EH36 steel, the less residual rust on the surface, the lower the degree of primary cell reaction with the substrate, and when the laser energy is increased to completely remove the surface rust, a thin and dense oxide layer is formed on the surface of the EH36 steel, thereby improving corrosion resistance [15] . Fang Shichao studied the removal of the modified thick slurry anti-rust paint layer on the surface of ship plate 921A steel by laser cleaning technology, and carried out macromicroscopic characterization and detection of the experimental results, and analyzed the influence of different laser cleaning parameters on the paint layer removal effect and substrate damage.…”