Studies of a reversed field pinch in a poloidal divertor configuration

J. S. Sarff, A. F. Almagri, S. Assadi, D. J. Den Hartog, R. N. Dexter, S. C. Prager, J. C. Sprott

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Abstract

An attempt has been made to form a reversed field pinch (RFP) in a poloidal divertor configuration which positions the plasma far from a conducting wall. In this configuration, the plasma is localized within a magnetic separatrix formed by a combination of toroidal currents in the plasma and four internal aluminium rings. Plasmas were formed with a plasma current of -135 kA, toroidal field reversal lasting -1 ms, line averaged density of -(1-2) × 1013 cm and central electron temperature of -50 eV, but a large asymmetry in the magnetic field (δ;B/B - 40%) set in at about the time when the toroidal field reversed at the wall. This behaviour might be expected on the basis of MHD stability analysis of a cylindrical plasma bounded by a large vacuum region and a distant conducting wall. The symmetric equilibrium before the asymmetry develops and the asymmetry itself are described.

Original languageEnglish (US)
Pages (from-to)104-108
Number of pages5
JournalNuclear Fusion
Volume29
Issue number1
DOIs
StatePublished - Jan 1989

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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