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Influence of the target front-surface curvature on proton acceleration in laser-foil interaction
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View: Figures


Image of FIG. 1.
FIG. 1.

The targets and their positions in the simulation box. The initial density of the targets is . The width of the targets is , located at , and the thickness is at . The space coordinates are normalized by the laser wavelength . The lower-right panel shows the temporal profile of the laser pulse, the peak intensity is , which corresponds to . is a laser cycle.

Image of FIG. 2.
FIG. 2.

Proton energy spectra at for the concave, flat, and convex foil targets.

Image of FIG. 3.
FIG. 3.

Phase spaces of protons at time . The target rear surface is now located at due to the plasma movement.

Image of FIG. 4.
FIG. 4.

Energy spectra of hot electrons with at time for the concave, flat, and convex targets.

Image of FIG. 5.
FIG. 5.

Spatial distribution of the square root (normalized by the laser electric field ) of the instantaneous electromagnetic energy at .

Image of FIG. 6.
FIG. 6.

The electron energy density distributions normalized by the initial electron density for electrons with (corresponding to the hot electrons with ) at (left) and (right). The maximum electron energy density is 100 for both the concave and convex targets and 45 for the flat target.

Image of FIG. 7.
FIG. 7.

The profiles of the electron energy density distributions at and at .

Image of FIG. 8.
FIG. 8.

The cycle-averaged magnetic field at (left) and (right).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of the target front-surface curvature on proton acceleration in laser-foil interaction