Magnetic bucket for rotating unmagnetized plasma

Noam Katz; Cami Collins; John Wallace; Mike Clark; David Weisberg; Jon Jara-Almonte; Ingrid Reese; Carl Wahl; Cary Forest

doi:10.1063/1.4723820

Magnetic bucket for rotating unmagnetized plasma

Noam Katz, Cami Collins, John Wallace, Mike Clark, David Weisberg, Jon Jara-Almonte, Ingrid Reese, Carl Wahl, Cary Forest

Research output: Contribution to journal › Review article › peer-review

10 Scopus citations

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.

Original language	English
Article number	063502
Journal	Review of Scientific Instruments
Volume	83
Issue number	6
DOIs	https://doi.org/10.1063/1.4723820
State	Published - Jun 2012
Externally published	Yes

Funding

This work was funded in part by National Science Foundation (NSF) and (U.S.) Department of Energy (DOE). C.C. acknowledges support from the ORISE Fusion Energy Sciences Graduate Fellowship, and N.K. acknowledges support from the ORISE Fusion Energy Sciences Postdoctoral Fellowship. We thank Dennis Whyte for providing the radiation coefficients.

Funders	Funder number
National Science Foundation	1211937
Fusion Energy Sciences

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/1.4723820

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AU - Collins, Cami

AU - Wallace, John

AU - Clark, Mike

AU - Weisberg, David

AU - Jara-Almonte, Jon

AU - Reese, Ingrid

AU - Wahl, Carl

AU - Forest, Cary

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Magnetic bucket for rotating unmagnetized plasma

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