外加静电场的聚焦激光脉冲真空加速电子方案

Electron acceleration by a focused laser pulse in static electric field

采用五阶修正的聚焦激光光场方程模拟研究了由Singh提出的在电子和激光脉冲作用尾部阶段施加外场的加速方案,将Singh方案中采用的外加磁场改成了外加电场,并且考虑了光束的纵向电场和光束衍射效应.模拟结果显示,电子可以从加速相位阶段被外场导入下一个加速相位阶段而不进入减速相位阶段,因此电子能获得比不加外场方案更高的净能增益.

The model given by Singh for vacuum laser acceleration in a static magnetic field is revisited by using the fifth order corrected laser field equations of a focused laser beam in which the diffraction effect and the longitudinal electric field of a focused laser beam are considered. However, the static magnetic field is replaced with a static electric field in our model. Simulation shows that the electrons can gain much more net energy in this model than that without the added field. Due to the added static electric field, the electrons can be drawn out of deceleration phase from one acceleration stage and directly enter to next acceleration stage.