Electron Acceleration By Intense Laser In Vacuum

With the rapid development of the ultra-intense laser technology, how to utilize the high-powerful electromagnetic field to directly accelerate electrons has received much attention. In recent years, accelerating particles by intense laser-plasma interactions has got great achievements in experiments, and it is possible to get GeV monoenergetic beams of electrons. In the same period, laser induced particle acceleration in vacuum also has got rapid development. More over, the electron acceleration in vacuum can avoid plasma instability factors.This paper firstly introduces the condition of vacuum laser acceleration. There are two models for vacuum laser field acceleration: Ponderomotive Potential Moder and Capture Acceleration Scenario. And then it analyzes two different laser field distributions of the electromagnetic field, indicating the corresponding expression of the electric and magnetic fields, studing the electron motion characteristics in two field and imitating the laser field electron trajectory and the velocity distribution with the method of numerical calculation. Therefore, it makes conclusion that vacuum electron in intense laser field can effectively accelerate. Finally, the radiant energy spectrum is obtained according to the flux density generated by the motive electron, and it analyzes vacuum electron's radiation characteristics in laser field .