Characteristics of the toroidal relaxed state of reversed field pinches and comparison with experimental results

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859388· OSTI ID:6056368

Jain, K K ^[1]

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1. Institute for Plasma Research, Bhat, Ghandhinagar (India)

A toroidal equilibrium of a reversed field pinch based on Taylor's Bessel function model (BFM) is investigated. Characteristics of the toroidal relaxed state for a few reversed field pinch devices are presented in detail. It is shown that the toroidal relaxed state agrees with experimental observations not only in the inner region, like BFM, but also to a good extent in the outer region of a reversed field pinch. Inclusion of toroidal effects in the BFM leads to a decrease of the toroidal reversed flux and an increase of the minor radius at which the toroidal field reverses. The toroidal relaxed state has {mu}'' decreasing in the outer region when calculated using experimental procedure and a saturation of the on-axis value of the pinch parameter {Theta}. Toroidal effects and finite plasma pressure lead to enhancement of the pinch parameter {Theta}. The results in this paper show that the observed departure of experiment from the BFM is partly due to the toroidal geometry.

• OSTI ID: 6056368
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 2:11; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
BESSEL FUNCTIONS
CLOSED CONFIGURATIONS
CONFIGURATION
CONFINEMENT
CORRELATIONS
EQUILIBRIUM
FUNCTIONS
INHIBITION
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FLUX
PINCH EFFECT
PLASMA
PLASMA CONFINEMENT
PLASMA PRESSURE
PLASMA SIMULATION
RELAXATION
REVERSE-FIELD PINCH
SATURATION
SIMULATION
SPACE
TOROIDAL CONFIGURATION