Effect of sheath curvature on Rayleigh-Taylor mitigation in high-velocity uniform-fill, Z-pinch implosions

被引:45
作者
Douglas, MR [1 ]
Deeney, C [1 ]
Roderick, NF [1 ]
机构
[1] UNIV NEW MEXICO,ALBUQUERQUE,NM 87102
关键词
D O I
10.1103/PhysRevLett.78.4577
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页码:4577 / 4580
页数:4
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