Nonlinear tearing instabilities in tokamaks with locally flattened current profiles

Technical Report · Fri Jul 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/6837945· OSTI ID:6837945

Reiman, A H

Nonlinear tearing stability is evaluated for current profiles which are linearly stabilized by flattening the current in the neighborhood of the rational surface. When marginally stable to the linear instability, these profiles remain unstable in the presence of a small but finite island. The growth of the island saturated only when the island reaches the width it would have attained in the absence of flattening. Implications are discused for proposed methods of tearing mode stabilization and for theories of the tokamak sawtooth oscillation. 19 refs., 1 fig.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6837945
• Report Number(s): PPPL-2517; ON: DE88015867
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
FUNCTIONS
INSTABILITY
NONLINEAR PROBLEMS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
TEARING INSTABILITY
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
WAVE FUNCTIONS