ICF Targets with Joints and Gaps

Details ICF Targets with Joints and Gaps ICF Targets with Joints and Gaps

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..dpp..1e04g&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 10-15, 1996, abstract #1E.04

Physics

Plasma Physics

Scientific paper

Spherical copper doped beryllium shells formed by bonding two hemispheres are being considered as alternative target components for the NIF. Gaps could exist in the bond provided there is no open path from the interior to the outside of the shell. Mismatches in the inner or outer shell surfaces are also possible across the interface. In all cases, one is dealing with localized perturbations with wavelength small compared to amplitude. We have compared simulations in cartesian geometry for a joint within the NIF capsule with the anticipated NIF radiation drive, with simulations of aluminum or CH joints with NOVA drive. In addition, results have been obtained for gaps extending partially through a target shell. Typically, development of structure and drive non-uniformity results from the interaction between the predominant drive, assumed parallel to the joint or gap, and additional hydrodynamic motion perpendicular to the discontinuity, which extends outward into the surrounding target material. The simulations have led to experiments on NOVA to assess the effect and control of localized inhomogeneities.

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