Solid debris collection is essential for a variety of inertial confinement fusion experiments at the National Ignition Facility (NIF) including capsule diagnostics, stockpile stewardship, and nuclear physics measurements. Measurement of non-volatile species formed in the high density plasma will depend on the amount of target material and collection efficiency. An ideal collector would cover a wide area for enhanced solid angle capture; however, other diagnostics limit placement. Solid collection is also limited by the post-ignition chamber environment, i.e. heat, radiation and shock generated by the driver (laser), x-rays, and ablated shrapnel.   The unconverted laser light and x-rays precede activated radiochemical debris and ablate material from the surface of the collector. The composition of the chamber environment and molten shrapnel also limit the tracers that can be placed in the target. The purpose of this work was to characterize post-ignition debris on passive collection plates fielded during Deuterium-Tritium (DT) shots.

Solid debris collection for radiochemical diagnostics at NIF

244th National Meeting (2012)

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