RFP behavior at various F values in the MS

W. Shen, J. A. Beckstead, G. Chartas, S. A. Hokin, S. C. Prager, T. D. Rempel, C. W. Spragins, R. N. Dexter

Research output: Contribution to conferencePaperpeer-review


Plasma behavior is tracked as the reversal parameter F of the Madison Symmetric Torus (MST) is varied from -0.3 to 0.2 with corresponding pinch parameter θ from above 1.8 to under 1.2. The general plasma properties are quite similar for all F values, but significant differences exist: (1) Both magnetic and electrostatic fluctuations are minimum when the reversal is shallow (F = -0.1). (2) Plasma resistance is minimum and the conductivity temperature is maximum at shallow reversed plasma. (3) Enhanced plasma-wall interaction is found when F > 0. Periodic oscillations called flux jumps, or sawtooth oscillations, are seen on various diagnostics throughout most of the F-scan, but a dependence of amplitude and frequency on F is noted also. High-frequency (10-15 kHz) precursors associated with higher plasma temperature and longer plasma duration time are seen. Plasmas under various discharge conditions have been obtained and compared with standard discharges.

Original languageEnglish (US)
Number of pages1
StatePublished - 1989
EventIEEE International Conference on Plasma Science 1989 - Buffalo, NY, USA
Duration: May 22 1989May 24 1989


OtherIEEE International Conference on Plasma Science 1989
CityBuffalo, NY, USA

All Science Journal Classification (ASJC) codes

  • General Engineering


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