Affiliation: | aInstitute of Condensed Matter Physics, Linyi Normal University, Linyi, Shandong Province 276005, People's Republic of China bInstitute of Modern Physics, Fudan University, Shanghai 200433, People's Republic of China |
Abstract: | In this paper, we have studied the dynamic characteristics of relativistic electron injected into stationary intense vacuum laser fields. We found the dynamic trajectories can basically be classified as three categories, namely Inelastic Scattering (IS), Capture and Acceleration Scenario (CAS) and Penetrate into Axial Region and Move (PARM) trajectory. The physical mechanism as to the three kinds of electrons have been examined. In particular, the PARM trajectory which we presented in this paper is different from the CAS and IS trajectory which we had already found in our previous work. We will show the PARM stems from the strong diffraction effect of a tightly focused laser field. In addition, the initial condition for the three kinds of electrons to emerge were detailed investigated. It has been found that there are four factors which chiefly decide the appearance of the three kinds of dynamics trajectories, namely the laser beam width w0 and intensity a0, the electrons incident angle θ and initial transversal momentum pti. The implication of the PARM electrons to the planned vacuum laser accelerators is illustrated. |