Published 1991 | Version v1
Book

Free boundary ideal magnetohydrodynamic stability of three-dimensional stellarators

  • 1. Association Euratom-Confederation Suisse, Ecole Polytechnique Federale de Lausanne, Lausanne (Switzerland). Centre de Recherches en Physique des Plasmas
  • 2. Association Euratom-Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
  • 3. Ecole Polytechnique Federale, Lausanne (Switzerland)
  • 4. Lawrence Livermore National Lab., Livermore, CA (USA). National Energy Research Supercomputer Center

Description

The 3-D ideal MHD stability code TERPSICHORE is used to investigate the global external stability properties of the ATF device and the Wendelstein 7-X device. The stability of 3-D ATF equilibria with zero net toroidal plasma current and bell shaped pressure profiles shows that (a) external modes alter the internal stability properties, (b) the coupling between the main toroidal Fourier components of the mode and their sidebands is destabilizing, (c) the stabilizing outward shift of the magnetic axis is confirmed, (d) the quadrupole field deteriorates stability by annihilating the vacuum magnetic well and (d) global stability is insensitive to pressure profile effects. The ideal MHD stability of a sequence of configurations with zero net toroidal current that varies from a conventional L=2 stellarator to the proposed Wendelstein 7-X device shows that the mode structures are essentially internal and that this proposed configuration is stable to global modes at β=4.5% with a safe margin. (author). 10 refs, 11 figs

Additional details

Publishing Information

Publisher
IAEA.
Imprint Place
Vienna (Austria)
ISBN
92-0-130191-X
Imprint Title
Plasma physics and controlled nuclear fusion research 1990. V. 2
Imprint Pagination
809 p.
Journal Issue
Suppl. 1991
Journal Series
Nucl. Fusion.
Journal Page Range
p. 793-807.

Conference

Title
13. international conference on plasma physics and controlled nuclear fusion research.
Dates
1-6 Oct 1990.
Place
Washington, DC (USA).

Optional Information

Lead record
52s21-0xq96
Secondary number(s)
IAEA-CN--53/C-IV-20.