Stability and heating of a poloidal divertor tokamak
Five experimental studies - two stability and three heating investigations - have been carried out on Tokapole II, a Tokamak with a four node poloidal divertor. First, discharges have been attained with safety factor q as low as 0.6 over most of the column without degradation of confinement, and correlation of helical instability onset with current profile shape is being studied. Second, the axisymmetric instability has been investigated in detail for various noncircular cross-sectional shapes, and results have been compared with a numerical stability code adapted to the Tokapole machine. Third, application of high power fast wave ion cyclotron resonance heating doubles the ion temperature and permits observation of heating as a function of harmonic number and spatial location of the resonance. Fourth, low power shear Alfven wave propagation is underway to test the applicability of this heating method to tokamaks. Fifth, preionization by electron cyclotron heating has been employed to reduce the startup loop voltage by approx. 60%.
- Research Organization:
- Wisconsin Univ., Madison (USA)
- Sponsoring Organization:
- USDOE Asslstant Secretary for Energy Technology
- DOE Contract Number:
- AS02-76ET53051
- OSTI ID:
- 5124361
- Report Number(s):
- DOE/ET/53051-6; CONF-800707-19
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALFVEN WAVES
CLOSED PLASMA DEVICES
CONFIGURATION
DIVERTORS
ECR HEATING
HEATING
HELICAL INSTABILITY
HIGH-FREQUENCY HEATING
HYDROMAGNETIC WAVES
ICR HEATING
INSTABILITY
INTERNAL RING DEVICES
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
POLOIDAL DIVERTORS
SHAPE
STABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOKAPOLE DEVICES