Limiting. beta. in a tokamak with a small aspect ratio

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:7067344

Bespoludennov, S G; Degtyarev, L M; Medvedev, S Y

Calculations on the ideal MHD stability of the plasma in a tokamak with a small aspect ratio and an elongated cross section are discussed. The necessary condition for the stability of the n = 1 external mode, n = 1;q/sub s/greater than or equal to2 (q>1), for these configurations is replaced by more stringent condition q/sub s/greater than or equal toq/sub s//sup */>2. If the latter condition is violated, even a force-free equilibrium will be unstable. At q/sub s/>q/sub s//sup */, the limiting value of ..beta.. for all ideal modes is close to the limiting value for small-scale ballooning modes.

• Research Organization: M. V. Keldysh Institute of Applied Mathematics, Academy of Sciences of the USSR
• OSTI ID: 7067344
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 12:7; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ANNULAR SPACE
BALLOONING INSTABILITY
CLOSED PLASMA DEVICES
CONFIGURATION
FORCE-FREE MAGNETIC FIELDS
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MAGNETIC SURFACES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION