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Hybrid simulation of z-pinches in support of wire array implosion experiments at the Nevada Terawatt Facility

  • V. SOTNIKOV (a1), V. V. IVANOV (a1), T. E. COWAN (a1), J. N. LEBOEUF (a2), B. V. OLIVER (a3), C. COVERDALE (a4), B. JONES (a4), C. DEENEY (a4), T. A. MEHLHORN (a4), P. D. LePELL (a5), P. HELLINGER (a6) and P. TRÁVNÍČEK (a6)...

Abstract

Three-dimensional hybrid simulation of a plasma current-carrying column reveal two different regimes of sausage and kink instability development. In the first regime, with small Hall parameter, development of instabilities leads to the appearance of large-scale axial perturbations and eventually to bending of the plasma column. In the second regime, with a four-times-larger Hall parameter, small-scale perturbations dominate and no bending of the plasma column is observed. Simulation results are compared with laser probing experimental data obtained during wire array implosions on the Zebra pulse power generator at the Nevada Terawatt Facility.

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