|craig_poster.pdf||2006-02-20 13:57:21||Darren Craig|
Overview of Physics Advances in MST
Author: Darren Craig
Submitted: 2005-12-20 14:09:17
Co-authors: and MST Team
University of Wisconsin - Madison
1150 University Ave.
Madison, WI 53706
MST continues to be a fruitful device for plasma physics, particularly for studies of magnetic fluctuations and their effect on transport, the current profile, and ion heating. Multi-point Thomson scattering measurements of the electron temperature profile highlight the dramatic improvement in electron energy confinement during periods of reduced fluctuations with current profile control and the equally dramatic degradation of confinement during increased fluctuations at a sawtooth crash. In quasi-single helicity plasmas (where one magnetic mode dominates the spectrum) double filter SXR tomography has been used to infer temperature profiles and observe an enhancement of the temperature inside the dominant island. Hard X-Ray measurements also show evidence for generation of a confined high energy electron population when a large island is present. The current profile is strongly modified by both single and two-fluid effects arising from the magnetic fluctuations. Fast Charge Exchange Recombination Spectroscopy measurements of velocity fluctuations yield information on the MHD dynamo
This work is supported by U.S.D.O.E. and the N.S.F.
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