While detrimental to plasma performance, magnetohydrodynamic plasma instabilities in radial foil configurations do not preclude intense x-ray radiations from the central plasma column. As most of the plasma current flows there, the column pinches generating x-rays. However, pinch comes with a kink instability which twists the column and prevents homogeneous compression. This instability leads to the disruption of the plasma bubble surrounding the central plasma column. Loss of symmetry in the resulting plasma expansion has been recorded. It is possible to reduce the impact of instabilities by increasing the initial plasma mass. The central column can also be stabilized by using a central rod, delaying the formation of the kink.
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Magnetohydrodynamic instabilities in radial foil configurations
Gourdain, P.-A.; Greenly, J. B.; Hammer, D. A.; Kusse, B. R.; Pikuz, S. A.; Seyler, C. E.; Shelkovenko, T. C.; Knapp, P. F.
Follow Physics of Plasmas
, Volume 19 (2)
American Institute of Physics – Feb 1, 2012
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