| Popis: |
We investigate the motion of electrons in a plasma bubble (or an ion channel) under combined action of an oscillating laser field, quasistatic transverse wakefield, and longitudinal electric field. The longitudinal field E∥ significantly influences the broadband resonance between betatron oscillations of electrons and oscillations of the laser wave, which results in the profoundly different electron dynamics at different signs and magnitudes of the longitudinal force −eE∥. Specifically, we make a contrast between three representative cases: when this force is absent (−eE∥ = 0), when it accelerates electrons (−eE∥ > 0), and when it decelerates them (−eE∥ < 0). We estimate the electron energy gain at given laser-plasma parameters. |
