We present the design and operation of a test cassette for exposure of samples to radiation environments at the National Ignition Facility. The samples had normal lines of sight to the x-ray source in order to have uniform x-ray illumination. The incident x-radiation onto the samples was determined by the choice of filter thicknesses and materials. The samples were held at precise locations in the target chamber in order to have a known fluence incident. In the cassette, the samples were held in place in such a way that a minimal 'line contact' allows them to have the maximal mechanical response to the x-ray load. We present post-shot images of the debris found on films used for filters, and pre-and post-exposure specimens.

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We have designed a sample cassette that can be used to position up to six samples in the OMEGA laser chamber. The cassette accommodates round samples up to 38.1 mm (1.5(")) in diameter and square samples up to 27 mm on a side, any of which can be up to 12.7 mm thick. Smaller specimens are centered with spacers. The test cassette allows each sample to have a unique filter scheme, with multiple filter regions in front of each sample. This paper will present mechanical design considerations and operational aspects of the x-ray source application cassette.

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