1. [Untitled]
- Author
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A. F. Almagri, B. E. Chapman, Neal Crocker, D.J. Den Hartog, Jay Anderson, A. K. Hansen, Stewart C. Prager, C. S. Chiang, J. S. Sarff, G. Fiksel, and Darren Craig
- Subjects
Physics ,Turbulence ,General Physics and Astronomy ,Biasing ,Plasma ,Electrostatics ,Computational physics ,Momentum ,Coupling (physics) ,symbols.namesake ,Physics::Plasma Physics ,Electric field ,symbols ,Langmuir probe ,Atomic physics ,human activities - Abstract
Edge biasing in MST plasmas decreases electrostatic turbulent particle transport and increases the global particle confinement time. New Langmuir probe measurements in the edge identify decreased electric field fluctuations and increased anti-correlation of density and potential fluctuations to be responsible. Fast loss of momentum in the core of MST during sawtooth crash events can be explained as a result of nonlinear magnetic torques which allow viscous coupling over relatively distant regions of the plasma. Flow modifications resulting from biasing, plus other experiments, help reveal the nonlinear nature of this process, most directly measured by the triple product bispectral correlation between the nonlinearly interacting modes.
- Published
- 2000
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