We use annular apertures to produce coded images of inertial confinement fusion targets. The images are formed with 4--9 keV x rays; they are unfolded to obtain high-quality estimates of the source spatial distribution. Excellent time-integrated images have been obtained using x-ray film as a detector, and we are working to obtain time-resolved images using a gated microchannel-plate x-ray detector. Preliminary resolution-grid experiments show that the spatial resolution is equal or less than 5 (mu)m, and further experiments are planned to confirm a predicted resolution of equal or less than 3 (mu)m. We discuss the apertures, x-ray detectors, and image-processing software that forms this novel x-ray microscope.
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