The evolution of magnetic tower jets in the laboratory

A. Ciardi*, S. V. Lebedev, A. Frank, E. G. Blackman, J. P. Chittenden, C. J. Jennings, D. J. Ampleford, S. N. Bland, S. C. Bott, J. Rapley, G. N. Hall, F. A. Suzuki-Vidal, A. Marocchino, Thibaut Lery, C. Stehle

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    101 Scopus citations

    Abstract

    The evolution of laboratory produced magnetic jets is followed numerically through three-dimensional, nonideal magnetohydrodynamic simulations. The experiments are designed to study the interaction of a purely toroidal field with an extended plasma background medium. The system is observed to evolve into a structure consisting of an approximately cylindrical magnetic cavity with an embedded magnetically confined jet on its axis. The supersonic expansion produces a shell of swept-up shocked plasma that surrounds and partially confines the magnetic tower. Currents initially flow along the walls of the cavity and in the jet but the development of current-driven instabilities leads to the disruption of the jet and a rearrangement of the field and currents. The top of the cavity breaks up, and a well-collimated, radiatively cooled, "clumpy" jet emerges from the system.

    Original languageEnglish (US)
    Article number056501
    JournalPhysics of Plasmas
    Volume14
    Issue number5
    DOIs
    StatePublished - Jun 11 2007

    ASJC Scopus subject areas

    • Condensed Matter Physics

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