A test cassette for x-ray-exposure experiments at the National Ignition Facility.
We present the design and operation of a test cassette for exposure of samples to radiation environments at the National Ignition Facility. The cassette provides options for square and round samples and exposure areas; the cassette provides for multiple levels of filtration on a single sample, which allows dynamic range in experiments. 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, accurate to within a few hundred microns, 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 postshot images of the debris found on films used for filters, and pre- and postexposure specimens.
Fournier
K B
KB
Lawrence Livermore National Laboratory, Livermore, California 94551, USA. fournier2@llnl.gov
Celeste
J
J
Rekow
V
V
Bopp
D R
DR
May
M J
MJ
Fisher
J H
JH
Horton
R
R
Newlander
C D
CD
Jenkins
P
P
Trautz
K
K