Abstract
14 MeV DT neutrons emitted from a laser-imploded target have been imaged by using a penumbral aperture camera. This system consists of a 6-cm-thick tungsten toroidal aperture, an array of plastic scintillators, an optical fiber coupled two-stage image intensifier, and a cooled CCD camera. A burn region has been observed with a spatial resolution of ∼35 μm at a neutron yield of 5×1011. The spatial resolution was determined by a pixel resolution, the accuracy of the aperture fabrication, the alignment accuracy of the aperture, the signal-to-noise ratio of an encoded image, and the statistical fluctuation in detecting neutrons.
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