Plasma flow in MST: Effects of edge biasing and momentum transport from nonlinear magnetic torques |
| |
Authors: | J S Sarff A F Almagri J K Anderson B E Chapman D Craig C -S Chiang N A Crocker D J Den Hartog G Fiksel A K Hansen S C Prager |
| |
Institution: | (1) Physics Department, University of Wisconsin, 53706 Madison, Wisconsin, USA |
| |
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.
Presented at the Workshop on the Role of Electric Fields in Plasma Confinement and Exhaust, Budapest, 18–19 June, 2000. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|