Plasma flow in MST: Effects of edge biasing and momentum transport from nonlinear magnetic torques

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

Research output: Contribution to journalArticle

6 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)1471-1476
Number of pages6
JournalCzechoslovak Journal of Physics
Volume50
Issue number12
DOIs
StatePublished - Dec 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Plasma flow in MST: Effects of edge biasing and momentum transport from nonlinear magnetic torques'. Together they form a unique fingerprint.

  • Cite this

    Sarff, J. S., Almagri, A. F., Anderson, J. K., Chapman, B. E., Craig, D., Chiang, C. S., Crocker, N. A., Den Hartog, D. J., Fiksel, G., Hansen, A. K., & Prager, S. C. (2000). Plasma flow in MST: Effects of edge biasing and momentum transport from nonlinear magnetic torques. Czechoslovak Journal of Physics, 50(12), 1471-1476. https://doi.org/10.1023/A:1022812032755