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- W2016049941 abstract "We report on our continued development of the advanced x-ray plasma diagnostics based on spherically curved crystals. The diagnostics include x-ray spectroscopy with one-dimensional (1D) spatial resolution, 2D monochromatic self-imaging, and backlighting, and can be extended to the x-ray collimating and 2D absorption and emission spectroscopy. The system is currently used, but not limited to diagnostics of the targets ablatively accelerated by the NRL Nike KrF laser. A spherically curved quartz crystal (2d=6.687 03 Å, R=200 mm) has been used to produce monochromatic backlit images with the He-like Si resonance line (1865 eV) as the source of radiation. The spatial resolution of the x-ray optical system is 1.7 μm in selected places and 2–3 μm over a larger area. Another quartz crystal (2d=8.5099 Å, R=200 mm) with the H-like Mg resonance line (1473 eV) has been used for backit imaging with higher contrast. Sherically curved mica (2d=9.969 Å in the second order or reflection, R=200 mm) has been used for backlighting of the low density foam cryotargets with the backlighter energy of 1.26 keV. Time resolution is obtained with the help of a four-strip x-ray framing camera. Time resolved, 20×magnified, backlit monochromatic images of CH planar targets driven by the Nike facility have been obtained with spatial resolution of 2.5 μm in selected places and 5 μm over the focal spot of the Nike laser. A second crystal with a separate backlighter has been added to the imaging system. This makes it possible to use all four strips of the framing camera. As a result we have four monochromatic snapshots of developing instabilities. We are currently exploring the enhancement of this technique to the higher and lower x-ray energies. A progress in high energy (4.5 keV) backlighting that has been made in cooperation with the LLNL will be reported." @default.
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- W2016049941 date "2001-01-01" @default.
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- W2016049941 title "X-ray imaging diagnostics for the inertial confinement fusion experiments (abstract)" @default.
- W2016049941 doi "https://doi.org/10.1063/1.1323485" @default.
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