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Updated: Jul 16, 2026

Evaluating Primary Blast Effects In Vitro
Published on: September 18, 2017
Observation of a reflected shock in an indirectly driven spherical implosion at the national ignition facility
S Le Pape1, L Divol1, L Berzak Hopkins1
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Abstract:
A 200 μm radius hot spot at more than 2 keV temperature, 1 g/cm^{3} density has been achieved on the National Ignition Facility using a near vacuum hohlraum. The implosion exhibits ideal one-dimensional behavior and 99% laser-to-hohlraum coupling. The low opacity of the remaining shell at bang time allows for a measurement of the x-ray emission of the reflected central shock in a deuterium plasma. Comparison with 1D hydrodynamic simulations puts constraints on electron-ion collisions and heat conduction. Results are consistent with classical (Spitzer-Harm) heat flux.
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