Beta Limit for a System with a Closed Helical Magnetic Axis

Norihiko Sasaki, Kenji Harafuji, Sumio Kitajima, Yasuyuki Funato, Hiroshige Watanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The “critical B” at which an equilibrium either ceases to exist or becomes poor for confinement is determined for a non-axisymmetric system with a closed helical magnetic axis. The plasma is assumed to have a circular cross section through which a longitudinal current with a flat radial profile flows in a direction to either increase or decrease the rotational transform of the magnetic field. It is shown that an equilibrium does not exist in a certain range of current which increases the rotational transform due to the resonance of toroidal effects. It is also shown that there are the upper and lower limits of p value for a stable equilibrium.

Original languageEnglish
Pages (from-to)3814-3823
Number of pages10
Journaljournal of the physical society of japan
Issue number11
Publication statusPublished - 1984 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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