Abstract: Electron with an appropriate initial velocity injected into an oncoming, ultra-intense circularly polarized laser pulse will execute circular relativistic motion at the peak of laser pulse.

• 摘 要： 研究了逆流相对论高能电子与强激光脉冲相互作用的同步辐射过程，当电子具有合适的初速度且传播方向与激光的传播方向相反时，电子在激光脉冲中心作圆周运动。