Observation of a Reflected Shock in an Indirectly Driven Spherical Implosion at the National Ignition Facility

Observation of a Reflected Shock in an Indirectly Driven Spherical Implosion at the National Ignition Facility

A 200  μm radius hot spot at more than 2 keV temperature, 1  g/cm[superscript 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...

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Bibliographic Details
Main Authors: Le Pape, S., Divol, L., Berzak Hopkins, L. F., Mackinnon, A. J., Meezan, N. B., Casey, Daniel Thomas, Herrmann, H., McNaney, J., Ma, T., Widmann, K., Pak, A., Grimm, G., Knauer, J., Kilkenny, J. D., Frenje, Johan A., Petrasso, Richard D., Zylstra, Alex Bennett, Rinderknecht, Hans George, Rosenberg, Michael Jonathan, Gatu Johnson, Maria
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:English
Published: American Physical Society 2014
Online Access:http://hdl.handle.net/1721.1/88652
https://orcid.org/0000-0003-0489-7479
https://orcid.org/0000-0003-4969-5571
https://orcid.org/0000-0002-1020-3501
Description
Summary:A 200  μm radius hot spot at more than 2 keV temperature, 1  g/cm[superscript 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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