NIFS-146

FULL TEXT (PDF, 623 KB)

Author(s):

K. Itoh, S. -I.Itoh, A. Fukuyama, S. Tsuji and Allan J. Lichtenberg

Title:

A Model of Major Disruption in Tokamaks

Date of publication:

May 1992

Key words:

Major disruption, Stochasticity, Current diffusivity,Tokamak, Toroidicity, m=2 tearing mode, Explosive Growth

Abstract:

A mechanism for the onset of the major disruption is proposed which considers the effect of magnetic stochasticity on the growth of the m=2 tearing mode. The toroidicity can cause stochasticity near the separatrix of the m=2 magnetic island which enhances the current viscosity, resulting in explosive growth. The threshold condition and the time scale of rapid growth are studied. The role of the toroidal coupling to the m=1 component is also discussed.

List of NIFS Report (1992)Return toContents Page Return toNIFS Homepage
footer
 National Institute for Fusion Science
Copyright: 1995-2007 National Institute for Fusion Science (NIFS)
Address: 322-6,Oroshi-cho, Toki, GIFU, 509-5292, Japan
Telephone:+81-572-58-2222