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Kilovolt radiation from a laser-produced Al plasma
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Image of FIG. 1.
FIG. 1.

(Color online) The time-integrated 1-beam and 7-beam cases. The experimental spectra are in black; the atomic physics model in red. The energy scale is offset to allow comparison of peak heights.

Image of FIG. 2.
FIG. 2.

Streaked exposure (not film density) of a shot driven by two 2.5 ns beams 3 ns apart. The black line represents the laser profile.

Image of FIG. 3.
FIG. 3.

A continuum fit of 440 eV for 7 beams (gray line).

Image of FIG. 4.
FIG. 4.

These values, determined by the slope of the continuum, are lower than that indicated by spectral fits but show the weak energy dependence of with laser energy. The black circles indicate synchronous beams with the 2.5 ns pulse shape. Open circles represent 2, 4, or 6 beams staggered in time over several ns. Laser energies correspond to the number of beams as indicated in Table I.

Image of FIG. 5.
FIG. 5.

Experimental line ratios: (circles); (squares). Black symbols represent synchronous beams; open symbols indicate staggered beams.

Image of FIG. 6.
FIG. 6.

The satellite structure of shows the increase in density from the 1-beam case (lower curve) to the 7-beam case (upper curve).

Image of FIG. 7.
FIG. 7.

X-ray yield. Circles are for ; triangles for . Squares are for. Black symbols indicate synchronous beams; open indicates staggered beams.

Image of FIG. 8.
FIG. 8.

Conversion efficiency into of laser light to .

Image of FIG. 9.
FIG. 9.

Al charge-state abundance vs at .


Generic image for table
Table I.

Dependence of energy and irradiance on beam number with the OMEGA RM2401 pulse shape.

Generic image for table
Table II.

H- and He-like emission lines observed in Figs. 1, 2, and 6.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Kilovolt radiation from a laser-produced Al plasma