Compton散射对椭圆偏振激光调制不稳定性的影响

Influence of Compton scattering on modulation instability of elliptical polarized laser in plasma

应用相对论理论和多光子非线性Compton散射模型,对等离子体中多光子非线性Compton散射对椭圆偏振光调制不稳定性的影响进行了研究,给出了调制不稳定性的时间增长率修正方程,并进行了数值模拟。结果表明,与散射前相比,Compton散射光越强,引起调制不稳定性的最大时间增长率增量越大。在激光等离子体临界面附近处,散射引起的调制不稳定性的最大时间增长率增量加速了激光场的坍塌。

The Influence of Compton scattering on modulation instability of elliptical polarized laser in plasma is studied using the relativistic theory and the model of multi-photon nonlinear Compton scattering,the temporal growth rate revised equations of modulation instability are given out, and it is simulated numerically. The results show that compared with before the scattering, the increments of the maximum temporal growth rate of modulation instability are greater as the Compton scattering light is stronger. Near the critical surface of laser plasma, the increments of the maximum temporal growth rate of modulation instability formed by scattering light accelerate the collapsing of the laser field.