Effect of the initial plasma parameters on the structure of the current sheets developing in two-dimensional magnetic fields with a null line |
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Authors: | G V Ostrovskaya A G Frank and S Yu Bogdanov |
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Institution: | 1.Ioffe Physical-Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia;2.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The effect of the initial plasma parameters on the structure of the plasma of the current sheets that form in two-dimensional
magnetic fields with a null line is studied by holographic interferometry. The evolution of the plasma sheets that develop
in an initial low-density plasma, where a gas is mainly ionized by a pulse current passing through the plasma and initiating
the formation of a current sheet, has been comprehensively studied for the first time. At the early stage of evolution, the
spatial structure of such a plasma sheet differs substantially from the classic current sheets forming in a dense plasma.
Nevertheless, extended plasma sheets with similar parameters form eventually irrespective of the initial plasma density. |
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