HEMPI configuration for a NIF ignition campaign shot. The multipinhole array is divided into four different regions with four different x-ray filters.
(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.
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.
Total x-ray transmission folded with the image plate detector spectral response, , in inner and outer beam regions and differentially filtered images.
Background subtracted lineouts of the average image intensity along the Hohlraum axis.
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.
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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