2D Radiation MHD Simulations of Neon-Argon SATURN Z-pinches

Details 2D Radiation MHD Simulations of Neon-Argon SATURN Z-pinches 2D Radiation MHD Simulations of Neon-Argon SATURN Z-pinches

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..dpp..4s05h&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 10-15, 1996, abstract #4S.05

Physics

Plasma Physics

Scientific paper

We have extended previous modeling of well-characterized neon-argon z-pinches driven by the SATURN accelerator at SNL. The entire pinch length is modeled and non-LTE (local thermodynamic equilibrium) effects are included. The initial density distribution is given a parabolic variation in z to reproduce the observed ``zippering'' and a 1% random perturbation to stimulate Rayleigh-Taylor (RT) instability. RT modes grow to large amplitude, as observed experimentally. Stagnation conditions differ markedly for the LTE (max. ρ ~ few g/cc) and non-LTE cases (max. ρ ~ few × 10-2 g/cc). The difference is due to reduced radiative loss in the non-LTE case that results in higher temperatures, higher plasma pressures and a softer implosion. Remaining differences with experiment (max. ρ ~ few × 10-3 g/cc) may be due to 3D effects.

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