A high-energy x-ray microscope for inertial confinement fusion

We have developed a microscope capable of imaging x-ray emission from inert ial confinement fusion targets in the range of 7-9 keV. Imaging is accompli shed with a Kirkpatrick-Baez type, four-image microscope coated with a WB4C multilayer having a 2d period of 140 Angstrom. This microscope design (a s tandard used on the University of Rochester's OMEGA laser system) is capabl e of 5 mu m resolution over a region large enough to image an imploded targ et (similar to 400 mu m). This design is capable of being extended to simil ar to 40 keV if state-of-the-art, short-spacing, multilayer coatings are us ed (similar to 25 Angstrom), and has been configured to obtain 3 mu m resol ution with the appropriate choice of mirror size. As such, this type of mic roscope could serve as a platform for multiframe, hard x-ray imaging on the National Ignition Facility. Characterization of the microscope and laborat ory measurements of the energy response made with a cw x-ray source will be shown. (C) 1999 American Institute of Physics. [S0034-6748(99)50501-7].