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Published on: July 2, 2012
Observation of Fast Current Redistribution in an Imploding Plasma Column
C Stollberg1, E Kroupp1, D Mikitchuk1
1Weizmann Institute of Science, Herzl Street 243, 7610001 Rehovot, Israel.
Abstract:
Spectroscopic measurements of the magnetic field evolution in a Z-pinch throughout stagnation and with particularly high spatial resolution reveal a sudden current redistribution from the stagnating plasma (SP) to a low-density plasma (LDP) at larger radii, while the SP continues to implode. Based on the plasma parameters it is shown that the current is transferred to an increasing-conductance LDP outside the stagnation, a process likely to be induced by the large impedance of the SP. Since an LDP often exists around imploding plasmas and in various pulsed-power systems, such a fast current redistribution may dramatically affect the behavior and achievable parameters in these systems.
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