(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.
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.
A continuum fit of 440 eV for 7 beams (gray line).
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.
Experimental line ratios: (circles); (squares). Black symbols represent synchronous beams; open symbols indicate staggered beams.
The satellite structure of shows the increase in density from the 1-beam case (lower curve) to the 7-beam case (upper curve).
X-ray yield. Circles are for ; triangles for . Squares are for. Black symbols indicate synchronous beams; open indicates staggered beams.
Conversion efficiency into of laser light to .
Al charge-state abundance vs at .
Dependence of energy and irradiance on beam number with the OMEGA RM2401 pulse shape.
H- and He-like emission lines observed in Figs. 1, 2, and 6.
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