Space and time evolution of the charge density at along the axis of the laser propagation. The laser spot size is (a) and (b) , and the charge density is normalized by .
The charge density , the momentum of electrons , and the electric field with at different times at . (a) , (b) , (c) , and (d) . In the simulation, the plasma density is , the laser pulse has a peak amplitude , the laser spot size is , a sinusoidal wave form with a duration of 30 fs, and a center wavelength of 800 nm.
Modification of the potential and the longitudinal electric field by the test injected electron bunch in the bubble, for (a) , (b) in , (c) , in , and (d) in . The test electron bunch density is normalized by the plasma density .
(a) The plasma density profile in the laser propagating direction, has a flat profile, and decreases linearly from to . (b) Space and time evolution of the charge density at along the axis of the laser propagation direction. The charge density is normalized to .
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