Sawteeth and energy confinement in the Madison symmetric torus reversed-field pinch

B. E. Chapman, A. F. Almagri, M. Cekic, D. J. Den Hartog, S. C. Prager, J. S. Sarff

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Most Madison Symmetric Torus (MST) [Fusion Technol. 19, 131 (1991)] reversed-field pinch discharges exhibit sawtooth oscillations with a period of 2-5 ms, corresponding to magnetobydrodynamic (MHD) instability and increased transport. However, in discharges where the plasma-facing wall has been boronized, the plasma resistivity is reduced, and sawteeth are often suppressed for periods up to 20 ms. The energy confinement time during these sawtooth-free periods is triple the normal value, corresponding to a higher plasma temperature and lower Ohmic input power. In addition, the steady growth of the dominant magnetic fluctuations normally observed between sawtooth crashes is absent.

Original languageEnglish (US)
Pages (from-to)709-711
Number of pages3
JournalPhysics of Plasmas
Volume3
Issue number3
DOIs
StatePublished - Mar 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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