title: Uniformity of the Soft-X-Ray Emissions from Gold Foils Irradiated by OMEGA Laser Beams Determined by a Two-Mirror Normal-Incidence Microscope with Multilayer Coatings.
abstract: A two-mirror normal-incidence microscope with multilayer coatings was used to image the soft-x-ray emissions from planar foils irradiated by OMEGA laser beams. The bandpass of the multilayer coatings was centered at a wavelength of 48.3 ? (257-eV energy) and was 0.5 ? wide. Five overlapping OMEGA beams, without beam smoothing, were typically incident on the gold foils. The total energy was 1500 J, and the focused intensity was 6 x 10(13) W cm(-2). The 5.8x magnified images were recorded by a gated framing camera at various times during the 3-ns laser pulse. A pinhole camera imaged the x-ray emission in the energy range of >2 keV. On a spatial scale of 10 mum, it was found that the soft-x-ray images at 257 eV were quite uniform and featureless. In contrast, the hard-x-ray images in the energy range of >2 keV were highly nonuniform with numerous features of size 150 mum.
authors.forename: J F
authors.initials: JF
authors.lastname: Seely
authors.forename: G E
authors.initials: GE
authors.lastname: Holland
authors.forename: T
authors.initials: T
authors.lastname: Boehly
authors.forename: G
authors.initials: G
authors.lastname: Pien
authors.forename: D
authors.initials: D
authors.lastname: Bradley