Helical axis stellarator equilibrium model

Technical Report · Fri Feb 01 04:00:00 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 Univ., NJ (USA). Plasma Physics Lab.
• 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
700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields
CLOSED PLASMA DEVICES
CONFIGURATION
EQUILIBRIUM PLASMA
HELICAL CONFIGURATION
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FLUX
MATHEMATICAL MODELS
PLASMA
ROTATIONAL TRANSFORM
SHEAR
STELLARATORS
THERMONUCLEAR DEVICES