24 August 2017 Large Area Solid Radiochemistry (LASR) collector at the National Ignition Facility
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Abstract
The flux of neutrons and charged particles produced from inertial confinement fusion experiments at the National Ignition Facility (NIF) induces measurable concentrations of nuclear reaction products in various target materials. The collection and radiochemical analysis of the post-shot debris can be utilized as an implosion diagnostic to obtain information regarding fuel areal density and ablator-fuel mixing. Furthermore, assessment of the debris from specially designed targets, material doped in capsules or mounted on the external surface of the target assembly, can support experiments relevant to nuclear forensic research. To collect the shot debris, we have deployed the Large Area Solid Radiochemistry Collector (LASR) at NIF. LASR uses a main collector plate that contains a large collection foil with an exposed 20 cm diameter surface located ∼50 cm from the NIF target. This covers ∼0.12 steradians, or about 1% of the total solid angle. We will describe the design, analysis, and operation of this experimental platform as well as the initial results. To speed up the design process 3-dimensional printing was utilized. Design analysis includes the dynamic loading of the NIF target vaporized mass, which was modeled using LS-DYNA.
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Cory Waltz, Cory Waltz, Narek Gharibyan, Narek Gharibyan, Mike Hardy, Mike Hardy, Dawn Shaughnessy, Dawn Shaughnessy, Don Jedlovec, Don Jedlovec, Cal Smith, Cal Smith, } "Large Area Solid Radiochemistry (LASR) collector at the National Ignition Facility", Proc. SPIE 10390, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI, 103900H (24 August 2017); doi: 10.1117/12.2272640; https://doi.org/10.1117/12.2272640
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