Existence of core localized toroidicity-induced Alfven eigenmode

Technical Report · Wed Feb 01 04:00:00 EST 1995

DOI:https://doi.org/10.2172/10115933· OSTI ID:10115933

Fu, G Y

The core-localized toroidicity-induced Alfven eigenmode (TAE) is shown to exist at finite plasma pressure due to finite aspect ratio effects in tokamak plasma. The new critical beta for the existence of the TAE mode is given by {alpha}{approx} 3{epsilon} + 2s{sup 2}, where {epsilon} = r/R is the inverse aspect ratio, s is the magnetic shear and {alpha} = -Rq{sup 2}d{beta}/dr is the normalized pressure gradient. In contrast, previous critical {alpha} is given by {alpha} {approx} s{sup 2}. In the limit of s << {radical}r/R, the new critical {alpha} is greatly enhanced by the finite aspect ratio effects.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 10115933
• Report Number(s): PPPL--3049; ON: DE95007361
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340
ALFVEN WAVES
ASPECT RATIO
BETA RATIO
INSTABILITY
OSCILLATION MODES
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
TOKAMAK DEVICES