Thumbnail
Access Restriction
Open

Author Heidbrink, W. W. ♦ Ruskov, E. ♦ Carolipio, E. M. ♦ Fang, J. ♦ van Zeeland, M. A. ♦ James, R. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ ALFVEN WAVES ♦ EIGENFREQUENCY ♦ PLASMA INSTABILITY ♦ CHARGED-PARTICLE TRANSPORT ♦ BALLOONING INSTABILITY ♦ TOKAMAK DEVICES ♦ PLASMA CONFINEMENT ♦ BETA RATIO ♦ VELOCITY
Abstract An instability with a lower frequency than the toroidicity-induced Alfv{acute e}n eigenmode was initially identified as a beta-induced Alfv{acute e}n eigenmode (BAE). Instabilities with the characteristic spectral features of this {open_quotes}BAE{close_quotes} are observed in a wide variety of tokamak plasmas, including plasmas with negative magnetic shear. These modes are destabilized by circulating beam ions and they transport circulating beam ions from the plasma core. The frequency scalings of these {open_quotes}BAEs{close_quotes} are compared to theoretical predictions for Alfv{acute e}n modes, kinetic ballooning modes, ion thermal velocity modes, and energetic particle modes. None of these simple theories match the data. {copyright} {ital 1999 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-04-01
Publisher Place United States
Journal Physics of Plasmas
Volume Number 6
Issue Number 4


Open content in new tab

   Open content in new tab