Published in
Springer Verlag, Astrophysics and Space Science, 1-4(322), p. 19-23
DOI: 10.1007/s10509-009-9981-1
High Energy Density Laboratory Astrophysics 2008, p. 19-23
DOI: 10.1007/978-90-481-9999-0_4
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Formation of Episodic Magnetically Driven Radiatively Cooled Plasma Jets in the Laboratory
,
S. N. Bland ,
J. P. Chittenden ,
G. N. Hall,
A. Harvey Thompson,
A. Marocchino,
C. Ning,
C. Stehle,
A. Frank,
E. G. Blackman,
S. C. Bott,
T. Ray
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Abstract
We report on experiments in which magnetically driven radiatively cooled plasma jets were produced by a 1 MA, 250 ns current pulse on the MAGPIE pulsed power facility. The jets were driven by the pressure of a toroidal magnetic field in a "magnetic tower" jet configuration. This scenario is characterized by the formation of a magnetically collimated plasma jet on the axis of a magnetic "bubble", confined by the ambient medium. The use of a radial metallic foil instead of the radial wire arrays employed in our previous work allows for the generation of episodic magnetic tower outflows which emerge periodically on timescales of similar to 30 ns. The subsequent magnetic bubbles propagate with velocities reaching similar to 300 km/s and interact with previous eruptions leading to the formation of shocks.