Electrostatic drift wave eigenmodes in tokamaks

Technical Report · Sun Mar 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6593439· OSTI ID:6593439

Cheng, C Z; Tsang, K T

The eigenmode equation governing both the toroidicity-induced and the ion temperature gradient driven modes of arbitrary wavelengths in tokamaks is derived by employing the ballooning mode formalism. For the toroidicity-induced mode (electron driftwave), the ion magnetic drift resonances are destabilizing and can have a significant effect when the temperature ratio, T/sub e//T/sub i/, is of order unity. The ion temperature gradient driven mode (ion drift wave), which is unstable in a shear slab geometry, is found to be further destabilized by the ion magnetic drifts, resulting in a lower critical ion temperature gradient (eta/sub i/).

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.; Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AM02-76CH03073
• OSTI ID: 6593439
• Report Number(s): PPPL-1761
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BALLOONING INSTABILITY
CLOSED PLASMA DEVICES
DRIFT INSTABILITY
EIGENVALUES
INSTABILITY
ION TEMPERATURE
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES