A Framed Monochromatic X-ray Microscope

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Detector Crystal The Laser Fusion Experiments Groups from the Laboratory for Laser Energetics (LLE) and the Los Alamos National Laboratory (LANL) have jointly developed an instrument capable of simultaneously space-, time-, and spectrally resolving x-ray emission from inertial confinement fusion (ICF) targets. Uses of the instrument include framed imaging of line emission from fuel or shell dopants and monochromatic backlighting. The x-ray imaging is accomplished with a Kirkpatrick-Baez (KB)–type four-image microscope (developed at LLE). The microscope has a best spatial resolution of ~5 μm and a sensitive energy range of ~2 to 8 keV. Timeresolved x-ray images are obtained with a pair of custom framing cameras (developed at LANL), each of which records two of the four images in two independent 80-ps time intervals. In addition, the energy range of the images can be restricted to a narrow (monochromatic) spectral range (~10 to 100 eV) by the introduction of diffracting crystals. This technique has been demonstrated in LLE’s x-ray laboratory with an e-beam-generated dc x-ray source, and at the LANL Trident laser facility with x rays from a laser-produced plasma. The microscope and gated monochromatic x-ray imaging (GMXI) module are undergoing initial testing on LLE’s OMEGA laser fusion facility.

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تاریخ انتشار 1996