Experimental study of axisymmetric instability of inverse-dee and square tokamak equilibria

B. Lipschultz, S. C. Prager, T. H. Osborne, J. C. Sprott, M. Phillips

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Inverse-dee- and square-shaped equilibria are observed by experimentally mapping the magnetic-flux plot as a function of time in a tokamak with a 4-null poloidal divertor. Inverse-dee equilibria are observed to be unstable to the vertical magnetohydrodynamic axisymmetric instability on a time scale ∼1000 poloidal Alfvén times. Square equilibria are stable on the time scale available for observation. Instability growth is apparently slowed by field-shaping hoop and wall passive stabilization.

Original languageEnglish (US)
Pages (from-to)36-39
Number of pages4
JournalPhysical review letters
Volume43
Issue number1
DOIs
StatePublished - Jan 1 1979
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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