In this paper, we extend the second Born approximation(SBA) to circular polarization laser, calculate the differential cross section(DCS) of laser assisted e He with multiphoton exchanging and analyze the results.

• 把二级玻恩近似 (SBA)的方法推广至圆极化激光场 ,计算了发生多光子交换时的激光辅助电子被氦原子散射的微分散射截面。