Resonant Acceleration of Electrons in Combined Self-ConsistentQuasistatic Electromagnetic Fields and Intense Laser Fields

Abstract

Using the single electron model, the acceleration of electrons incombined circularly polarized intense laser fields and the spontaneousquasistatic fields (including axial and azimuthal magnetic fields, theaxial and transverse electric fields) produced in intense laser plasmainteraction is investigated analytically and numerically by fitting theproper parameters of the quasistatic fields based on the data from theexperiment and numerical calculation. A new resonant condition isgiven. It is found that the resonance acceleration of electron dependsnot only on laser field, but also on the bounce frequency oscillatingin the quasistatic magnetic field and electric field. The net energygained by electron does not increase monotonously with axial electricfield, but there are some optimal axial electric fields.