Helical axis stellarator equilibrium model

Technical Report · Fri Feb 01 00:00:00 EST 1985

DOI:https://doi.org/10.2172/6117137· OSTI ID:6117137

Koniges, A E; Johnson, J L

An asymptotic model is developed to study MHD equilibria in toroidal systems with a helical magnetic axis. Using a characteristic coordinate system based on the vacuum field lines, the equilibrium problem is reduced to a two-dimensional generalized partial differential equation of the Grad-Shafranov type. A stellarator-expansion free-boundary equilibrium code is modified to solve the helical-axis equations. The expansion model is used to predict the equilibrium properties of Asperators NP-3 and NP-4. Numerically determined flux surfaces, magnetic well, transform, and shear are presented. The equilibria show a toroidal Shafranov shift.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6117137
• Report Number(s): PPPL-2195; ON: DE85008716
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
STELLARATORS
MAGNETIC FIELD CONFIGURATIONS
EQUILIBRIUM PLASMA
HELICAL CONFIGURATION
MAGNETIC FLUX
MATHEMATICAL MODELS
ROTATIONAL TRANSFORM
SHEAR
CLOSED PLASMA DEVICES
CONFIGURATION
PLASMA
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields