Effect of Sheath Curvature on Rayleigh-Taylor Mitigation in High-Velocity Uniform-Fill, Z-Pinch Implosions

Details Effect of Sheath Curvature on Rayleigh-Taylor Mitigation in High-Velocity Uniform-Fill, Z-Pinch Implosions Effect of Sheath Curvature on Rayleigh-Taylor Mitigation in High-Velocity Uniform-Fill, Z-Pinch Implosions

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvl..78.4577d&link_type=abstract

Physical Review Letters, Volume 78, Issue 24, June 16, 1997, pp.4577-4580

Physics

33

Scientific paper

Recent gas puff experiments on the 7-MA Saturn machine identified a curved surface at the plasma-vacuum interface during the run-in phase of the implosion. Incorporating this topology into a corresponding two-dimensional magnetohydrodynamic calculation revealed that this curvature plays a surprisingly dominant role in mitigating Rayleigh-Taylor (RT) growth prior to stagnation. Calculations with both Saturn and representative PBFA-Z parameters show that sheath curvature contributes to the reduction in RT growth by convecting the instability to the edges of the pinch faster than it can grow.

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