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Analysis of the National Ignition Facility ignition hohlraum energetics experiments a)
a)Paper BI2 4, Bull. Am. Phys. Soc. 55, 21 (2010).
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10.1063/1.3562552
/content/aip/journal/pop/18/5/10.1063/1.3562552
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/5/10.1063/1.3562552
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Five laser pulses with energies from 500 kJ to 1.3 MJ were fielded during the hohlraum energetics campaign.

Image of FIG. 2.
FIG. 2.

(Color online) The total Dante flux as a function of time for the experiment (solid line), HF model (dash-dot line), and Nova model (dashed line) for an ignition-scale hohlraum driven with a 1.0MJ laser drive (shot N091204). A typical error bar is also shown.

Image of FIG. 3.
FIG. 3.

(Color online) The simulated peak x-ray flux from the Nova model (open circles) and the HF model (filled circles) against the experimental peak Dante flux for the 2009 experiments. Also shown, as diamonds, are the HF model’s simulations for the 2010 experiments. Good agreement between the simulation and the experiment corresponds to the dashed one-to-one line. The experimental error bars are ±5%.

Image of FIG. 4.
FIG. 4.

(Color) The Dante spectrum for the experiment (black), HF model (red), and Nova model (blue) at the peak of the drive for an ignition-scale hohlraum driven with a 1.0 MJ laser drive (shot N091204).

Image of FIG. 5.
FIG. 5.

(Color online) The simulated peak x-ray preheat fraction from the Nova model (open circles) and the HF model (filled circles) against the experimental peak x-ray preheat fraction. Also shown, as diamonds, are the HF model’s simulations for the 2010 experiments. The experimental error bar is ±10%.

Image of FIG. 6.
FIG. 6.

(Color online) The time history of the 23.5° (solid line), 30° (dashed line), 44.5° (dash-dot-dot line), and 50° (dash-dot line) quads before (a) and after (b) cross-beam amplification and backscatter removal for the recent 1.0 MJ shot N101004 with Δλ = 8.5 Å.

Image of FIG. 7.
FIG. 7.

The inner-cone fraction for the incident laser pulse (dashed line) and the laser power generated with power transfer and backscatter removed (dash-dotted line) for the 1.0 MJ shot N101004 with Δλ = 8.5 Å. The total laser pulse is shown as the solid line. The average inner-cone fraction over the peak of the laser pulse rises from an input fraction of 33% to 57%.

Image of FIG. 8.
FIG. 8.

(Color online) The change in the x-ray brightness of the wall emission attributed to the outer laser quads for the experiment (squares), Nova-model (open circles) and HF model (filled circles).

Image of FIG. 9.
FIG. 9.

(Color online) The change in the P2/P0 of the 17% contour of the emission from the imploded capsule for the experiment (squares), Nova model (open circles), and HF model (filled circles).

Image of FIG. 10.
FIG. 10.

(Color online) The change in the peak x-ray radiant intensity measured by Dante as a function of Δλ for the experiment (squares), Nova model (open circles), and HF model (filled circles).

Image of FIG. 11.
FIG. 11.

(Color online) The 30° quad SRS backscatter (diamonds) and total SRS energy inferred from the hot-electron measurement (squares) as a function of Δλ.

Image of FIG. 12.
FIG. 12.

The coupling efficiency of laser energy into the hohlraum as a function of incident laser energy.

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2011-04-07
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Analysis of the National Ignition Facility ignition hohlraum energetics experiments a)
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/5/10.1063/1.3562552
10.1063/1.3562552
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