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Determination of electron-heated temperatures of petawatt laser-irradiated foil targets with 256 and 68 eV extreme ultraviolet imaging
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10.1063/1.2987683
/content/aip/journal/rsi/79/9/10.1063/1.2987683
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/9/10.1063/1.2987683
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of XUV imaging diagnostic setup.

Image of FIG. 2.
FIG. 2.

(a) Reflectivity as a function of energy at various grazing incidence angles for the 256 eV spherical and turning mirrors. Open squares: spherical mirror at incidence angle; open triangles: spherical mirror at incidence angle; solid circle: turning mirror at incidence angle; hatches: turning mirror at angle. (b) Reflectivity as a function of energy at various grazing incidence angles for the 68 eV spherical and turning mirrors. Open diamonds: spherical mirror at incidence angle; open triangles: spherical mirror at incidence angle; solid circles: turning mirror at incidence angles; hatches: turning mirror at incidence angles.

Image of FIG. 3.
FIG. 3.

Comparison of reflectivity for different orders on the 68 eV spherical mirror. All measurements were taking at grazing angle incidence. Crosses: first order; dotted line: second order; solid triangles: fourth order.

Image of FIG. 4.
FIG. 4.

Effect of shot exposure on mirror reflectivity. Dotted line with diamonds is for the 68 eV XUV spherical multilayer mirror and the solid line with circles is for the 256 eV XUV spherical multilayer mirror.

Image of FIG. 5.
FIG. 5.

A Cu target. (a) The raw 256 eV image shown as CCD counts and line out of the image; (b) the raw 68 eV image shown as CCD counts and lineout of the 68 eV image. The long time scale of bright emission at the 68 eV energy allows the capture of the whole interaction region.

Image of FIG. 6.
FIG. 6.

LASNEX simulations results: peak target pre-expansion temperature vs absolute brightness for a selection of flat foil targets. Solid diamonds: Cu at 256 eV; solid squares: Cu at 68 eV; open circles: Cu at 256 eV; open triangles: Cu at 68 eV; large dashed vertical line: 256 eV detection threshold; small dashed vertical line: 68 eV detection threshold.

Image of FIG. 7.
FIG. 7.

(a) Temperature map and line out for the Cu target based on the 256 eV XUV imager. (b) Temperature map and line out for the Cu target based on the 68 eV XUV imager.

Image of FIG. 8.
FIG. 8.

Peak temperatures derived from the two different XUV imagers plotted against each other. Squares: Cu; circles: Cu; triangles: . The diagonal line indicates equivalent temperatures from both imagers.

Image of FIG. 9.
FIG. 9.

Target backside peak temperatures as a function of target equivalent Cu density thickness. Squares: Cu; circles: Cu; triangles: .

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/content/aip/journal/rsi/79/9/10.1063/1.2987683
2008-09-22
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Determination of electron-heated temperatures of petawatt laser-irradiated foil targets with 256 and 68 eV extreme ultraviolet imaging
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/9/10.1063/1.2987683
10.1063/1.2987683
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