TITLE

The rotating wall machine: A device to study ideal and resistive magnetohydrodynamic stability under variable boundary conditions

AUTHOR(S)
Paz-Soldan, C.; Bergerson, W. F.; Brookhart, M. I.; Hannum, D. A.; Kendrick, R.; Fiksel, G.; Forest, C. B.
PUB. DATE
December 2010
SOURCE
Review of Scientific Instruments;Dec2010, Vol. 81 Issue 12, p123503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The rotating wall machine, a basic plasma physics experimental facility, has been constructed to study the role of electromagnetic boundary conditions on current-driven ideal and resistive magnetohydrodynamic instabilities, including differentially rotating conducting walls. The device, a screw pinch magnetic geometry with line-tied ends, is described. The plasma is generated by an array of 19 plasma guns that not only produce high density plasmas but can also be independently biased to allow spatial and temporal control of the current profile. The design and mechanical performance of the rotating wall as well as diagnostic capabilities and internal probes are discussed. Measurements from typical quiescent discharges show the plasma to be high β (≤p>2μ0/Bz2), flowing, and well collimated. Internal probe measurements show that the plasma current profile can be controlled by the plasma gun array.
ACCESSION #
65091194

 

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