Analytical theory of interchange and compressional Alfven instabilities in EBT
The local stability of the EBT plasma is analyzed for the long wavelength perturbations in the frequency regime, ..omega.. approx. less than or equal to ..cap omega../sub i/(..cap omega../sub i/ is ion cyclotron frequency). In addition to the low frequency interchange instability, the plasma can be unstable to the compressional Alfven wave. Contrary to the previously obtained quadratic dispersion relation in ..omega.. for the interchange mode, our dispersion relations for both types of instabilities are cubic in ..omega... New stability boundaries are found, for the hot electron interchange mode, to relate to the enhanced compressibility of the core plasma in the presence of hot electrons. The compressional Alfven instability is driven due to the coupling of hot electron magnetic drifts and diamagnetic drift with the compressional Alfven wave. The stability conditions of these two types of instabilities are opposite to each other.
- Research Organization:
- Princeton Univ., NJ (USA). Plasma Physics Lab.; Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AM02-76CH03073
- OSTI ID:
- 6378196
- Report Number(s):
- PPPL-1810; ON: DE81025900
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ALFVEN WAVES
CYCLOTRON FREQUENCY
DISPERSION RELATIONS
ELMO BUMPY TORUS
ELMO DEVICES
FLUTE INSTABILITY
HYDROMAGNETIC WAVES
INSTABILITY
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ALFVEN WAVES
CYCLOTRON FREQUENCY
DISPERSION RELATIONS
ELMO BUMPY TORUS
ELMO DEVICES
FLUTE INSTABILITY
HYDROMAGNETIC WAVES
INSTABILITY
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES