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Characterizing high energy spectra of NIF ignition Hohlraums using a differentially filtered high energy multipinhole x-ray imagera)
a)Contributed paper, published as part of the Proceedings of the 18th Topical Conference on High-Temperature Plasma Diagnostics, Wildwood, New Jersey, May 2010.
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10.1063/1.3478682
/content/aip/journal/rsi/81/10/10.1063/1.3478682
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/10/10.1063/1.3478682

Figures

Image of FIG. 1.
FIG. 1.

HEMPI configuration for a NIF ignition campaign shot. The multipinhole array is divided into four different regions with four different x-ray filters.

Image of FIG. 2.
FIG. 2.

(a) Images of the emitting Hohlraum from shot N091204-001-999. (b) The places where the inner and outer laser beams strike the Hohlraum are clearly distinguished.

Image of FIG. 3.
FIG. 3.

Schematic of scale 1.07 Hohlraum showing the components of the cryogenic package and diagnostics views. The materials and thicknesses along the detector line of sight were considered in the analysis of the HEMPI images.

Image of FIG. 4.
FIG. 4.

Total x-ray transmission folded with the image plate detector spectral response, , in inner and outer beam regions and differentially filtered images.

Image of FIG. 5.
FIG. 5.

Background subtracted lineouts of the average image intensity along the Hohlraum axis.

Image of FIG. 6.
FIG. 6.

Characteristic Maxwellian temperature vs image intensity ratios for the differential filters used on this shot. Our data are best fitted with 40 keV for the inner beam area and 10 keV for the outer beam areas.

Tables

Generic image for table
Table I.

Image intensity ratios from different regions of the Hohlraum. Note that the different regions go through different materials and different thicknesses.

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/content/aip/journal/rsi/81/10/10.1063/1.3478682
2010-10-14
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Characterizing high energy spectra of NIF ignition Hohlraums using a differentially filtered high energy multipinhole x-ray imagera)
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/10/10.1063/1.3478682
10.1063/1.3478682
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