Locking of the kink-perturbation frequency in a tokamak

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:5610717

Ivanov, N V; Kakurin, A M

A possible mechanism for the locking of the frequency of a kink perturbation in a tokamak by an external helical magnetic field is discussed. The plasma in which the kink perturbation develops is treated as a (self-excited) oscillator. Frequency locking in such systems is a familiar effect and a natural consequence of nonlinearity. A simple model leads to the frequency dependence of the locking threshold and of the phase and amplitude of the locked mode. The calculated results are compared with experimental data obtained in the ATC. The arguments are confirmed by experimental results from the TO-1 tokamak, and are consistent with the idea that a kink perturbation is a manifestation of a dissipative tearing-mode instability.

• Research Organization: I. V. Kurchatov Institute of Atomic Energy
• OSTI ID: 5610717
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 5:5; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ATC DEVICES
CLOSED PLASMA DEVICES
FEEDBACK
INSTABILITY
KINK INSTABILITY
MOTION
NONLINEAR PROBLEMS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RESONANCE
ROTATION
STABILIZATION
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES