Equilibrium and stability studies for high-beta plasmas in torsatron/heliotron devices
The equilibrium and stability properties of high-..beta.. plasmas in torsatron/heliotron devices have been investigated. Three numerical approaches have been used to study plasma equilibria for a range of coil configurations. The method of averaging permits fast equilibrium and stability calculations. Two fully 3-D codes, namely the Chodura-Schluter code, and the NEAR code recently developed at ORNL, are used to explore selected regions of parameter space. The resulting equilibria calculated with different methods are in good agreement. This validates the average method approach and enhances its usefulness. Results are presented for configurations with different aspect ratios and number of field periods. The role of the vertical field has also been studied in detail. The main conclusion is that for moderate aspect ratios (A/sub p/ less than or equal to 8), the self-stabilizing effect of the magnetic-axis shift is large enough to open a direct path to the second-stability regime.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6410141
- Report Number(s):
- CONF-830342-1; ON: DE83009857
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700107* -- Fusion Energy-- Plasma Research-- Instabilities
700202 -- Fusion Power Plant Technology-- Magnet Coils & Fields
ASPECT RATIO
CLOSED PLASMA DEVICES
EQUILIBRIUM PLASMA
HELIOTRON
HIGH-BETA PLASMA
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
PLASMA
PLASMA INSTABILITY
STELLARATORS
THERMONUCLEAR DEVICES
THREE-DIMENSIONAL CALCULATIONS
TORSATRON STELLARATOR