Development of Advanced Techniques for Direct-Drive Absolute EOS Measurements

Details Development of Advanced Techniques for Direct-Drive Absolute EOS Measurements Development of Advanced Techniques for Direct-Drive Absolute EOS Measurements

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..dpppto204b&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 17-21, 1997, abstract #pThpO204.

Physics

Plasma Physics

Scientific paper

This project investigates advanced EOS experimental techniques, relevant to measurements such as those suggested for the proposed Trident-upgrade laser facility at Los Alamos. Experiments, which recently began at Nova, are focused towards simultaneous direct-drive Beryllium absolute principal Hugoniot (PH), and zero pressure release isentropes measurements. Be is the chosen EOS sample, since it is an important ICF material with particular relevance to NIF capsule designs. Furthermore, its low x-ray opacity and high shock and particle speed - in comparison to denser materials - makes Be an ideal material with which to develop these advanced methods. Side-on x-radiography - and direct-drive - are currently believed to be the optimum approach towards high-accuracy laser-based EOS. And to this end, a novel high spatial resolution one-dimensional x-ray microscope has been designed and is currently under fabrication. The utilization of the Nova active shock breakout diagnostic in the future, could extend this project to include the addition of sound speed to the PH and isentrope measurements. Progress to date will be discussed.

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