title: Magnetic bucket for rotating unmagnetized plasma.
abstract: A new experiment is described which generates flow in unmagnetized plasma. Confinement is provided by a cage of permanent magnets, arranged to form an axisymmetric, high-order, multipolar magnetic field. This field configuration-sometimes called a "magnetic bucket"-has a vanishingly small field in the core of the experiment. Toroidal rotation is driven by J × B forces applied in the magnetized edge. The cross-field current that is required for this forcing flows from anodes to thermionic cathodes, which are inserted between the magnet rings. The rotation at the edge reaches 3 km/s and is viscously coupled to the unmagnetized core plasma. We describe the conditions necessary for rotation, as well as a 0-dimensional power balance used to understand plasma confinement in the experiment.
authors: Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA. nkatz2@wisc.edu
authors: Noam
authors: N
authors: Katz
authors: Cami
authors: C
authors: Collins
authors: John
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authors: Wallace
authors: Mike
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authors: Clark
authors: David
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authors: Weisberg
authors: Jon
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authors: Jara-Almonte
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authors: Reese
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