Published April 1999
| Version v1
Journal article
What is the 'beta-induced Alfven eigenmode?'
- 1. University of California, Irvine, California 92697 (United States)
- 2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Description
An instability with a lower frequency than the toroidicity-induced Alfven eigenmode was initially identified as a beta-induced Alfven eigenmode (BAE). Instabilities with the characteristic spectral features of this 'BAE' 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 'BAEs' are compared to theoretical predictions for Alfven modes, kinetic ballooning modes, ion thermal velocity modes, and energetic particle modes. None of these simple theories match the data. copyright 1999 American Institute of Physics
Additional details
Publishing Information
- Journal Title
- Physics of Plasmas
- Journal Volume
- 6
- Journal Issue
- 4
- Journal Page Range
- p. 1147-1161
- ISSN
- 1070-664X
- CODEN
- PHPAEN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 30037661
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- ALFVEN WAVES; BALLOONING INSTABILITY; BETA RATIO; CHARGED-PARTICLE TRANSPORT; EIGENFREQUENCY; PLASMA CONFINEMENT; PLASMA INSTABILITY; TOKAMAK DEVICES; VELOCITY
- Descriptors DEC
- CLOSED PLASMA DEVICES; CONFINEMENT; HYDROMAGNETIC WAVES; INSTABILITY; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; RADIATION TRANSPORT; THERMONUCLEAR DEVICES