Abstract
A micro-channel plate based temporally-gated x-ray camera (framing camera) is one of the most versatile diagnostic tools of inertial confinement fusion experiments; particularly for observation of the shape of x-ray self emission from compressed core of imploded capsules. However, components used in an x-ray framing camera have sensitivity to various kinds of secondary radiation induced by neutron. On early low-yield capsule implosions at the National Ignition Facility (NIF), the expected neutron production is about 5×1014. Therefore, the expected neutron fluence at a framing camera located ∼ 150 cm from the object is 2×109 neutrons/cm2. To obtain gated x-ray images in such harsh neutron environments, quantitative understanding of neutron-induced backgrounds is crucial.
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