On the stability of axisymmetric modes in straight tokamaks
This paper investigates the axisymmetric magnetohydrodynamic m = 1 modes in plane plasma vacuum equilibria, which reduce to rigid shifts in the cylindrically symmetric limit. The aim of the paper is to generalise the difference between elliptical and higher corrugation to arbitrary current profiles and to observe the stability properties of elliptically corrugated equilibria. It is shown that in elliptically corrugated equilibria, stability to a given shift depends crucially on the direction of the shift (leading to vertical shift instability), whereas in triangular or even more highly corrugated equilibria the direction of the shift is of no importance. Additionally, stability of elliptically corrugated equilibria with vanishing total current (but nonvanishing current density) is also investigated.
Bibliographic Reference: Article: Physics of Plasmas, Vol. 1 (1994) No. 10, pp. 3378-3382
Record Number: 199510058 / Last updated on: 1995-01-10
Original language: en
Available languages: en