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Single-shot divergence measurements of a laser-generated relativistic electron beam
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View: Figures


Image of FIG. 1.
FIG. 1.

Target geometry schematics (a) without or (b) with a gold cone attached to the target edge. Corresponding photographs are given on the right-hand-side.

Image of FIG. 2.
FIG. 2.

Diagnostics layout.

Image of FIG. 3.
FIG. 3.

Side-view x-ray image of a target without cone, raw (a), or reshaped (b). The arrow indicates the incoming laser direction.

Image of FIG. 4.
FIG. 4.

Typical images obtained without [(a) and (b)] or with [(c) and (d)] cone. (b) and (d) correspond to the smaller targets. The laser comes from the left-hand side and the color scale is in arbitrary units, although identical for all the displayed images.

Image of FIG. 5.
FIG. 5.

Illustration of the two different methods to analyze the same data, (a) as in layered targets experiments and (b) as in the present report.

Image of FIG. 6.
FIG. 6.

Results of the images analysis. The red squares and yellow triangles designate, respectively, the targets without and with cones.

Image of FIG. 7.
FIG. 7.

Measured electron spectrum (gray area). The dashed line is the input spectrum used in Sec. V.

Image of FIG. 8.
FIG. 8.

Simulated images (a) without preplasma, (b) with a preplasma, and (c) with a preplasma. The input half-opening divergence angle is .

Image of FIG. 9.
FIG. 9.

Simulated fraction of the emission produced by electrons initially faster than 1 MeV.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single-shot divergence measurements of a laser-generated relativistic electron beam