The role of plasma rotation on MHD instabilities in tokamaks

Conference · Fri Jan 01 00:00:00 EST 1993

OSTI ID:6423165

Varadarajan, V; Miley, G H

An improved analysis of the linear stage of the internal kink mode has been developed to include plasma rotation and finite aspect ratio effects. The linear instabiliy growth rates are increased by the plasma rotation. A pseudo-variational, bilinear formalism is used to discretize the linear instability equations; Fourier decomposition is used in the periodic coordinate, and a mixed-finite element procedure is adopted in the radial direction. The numerical studies with the resulting PEST-like code can be used to predict the complex plasma eigenfrequencies. The finite aspect ratio results are similar to the large aspect ratio results for flow instability. The complex instability frequencies found in the fishbone'' and TAE modes would be strong determined by the large plasma rotation velocities observed in present-day tokamak devices. These effects could be studied by using the computationally convenient bilinear form derived from the Frieman-Rotenberg equation.

• Research Organization: Illinois Univ., Urbana, IL (United States). Fusion Studies Lab.
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-90ER54092
• OSTI ID: 6423165
• Report Number(s): CONF-930281-7; ON: DE93013486
• Resource Relation: Conference: 6. transport task force workshop, Newport, RI (United States), 21-25 Feb 1993
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA INSTABILITY
MHD EQUILIBRIUM
ROTATING PLASMA
ASPECT RATIO
INSTABILITY GROWTH RATES
TOKAMAK DEVICES
CLOSED PLASMA DEVICES
EQUILIBRIUM
INSTABILITY
PLASMA
THERMONUCLEAR DEVICES
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)
700370 - Plasma Fluid & MHD Properties- (1992-)