Coil configurations for low aspect ratio stellerators
Using the NESCOIL code, it is possible to find a surface current distribution which can create a given last closed flux surface. Thus, almost any stellarator configuration can be created with either helical or modular currents. In particular, we have succeeded in finding current distributions which generate the optimized ATF-II configuration described in Hirshman's paper. As the aspect ratio of the configuration is decreased, or the plasma-to-coil distance is increased, the harmonic content of the surface currents is increased. This makes it a challenge to cut the distribution into either discrete helical or modular coils which are attractive from an engineering point of view. Several approaches to this problem are discussed. There have been some hints of promising configurations, but to date, none of them are satisfactory. 2 refs., 7 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6265826
- Report Number(s):
- CONF-890403-8; ON: DE89011570
- Resource Relation:
- Conference: 7. international stellerator workshop, Oak Ridge, TN, USA, 10 Apr 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ATF TORSATRON
MAGNETIC FIELD CONFIGURATIONS
ASPECT RATIO
COMPUTERIZED SIMULATION
CURRENT DENSITY
MAGNET COILS
OPTIMIZATION
CLOSED PLASMA DEVICES
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
SIMULATION
STELLARATORS
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
700202* - Fusion Power Plant Technology- Magnet Coils & Fields