Symmetric simple map for a single-null divertor tokamak

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872094· OSTI ID:466902

Punjabi, A; Ali, H; Boozer, A ^[1]

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1. Center for Fusion Research and Training, Hampton University, Hampton, Virginia 23668 (United States)

A new map called the symmetric simple map is introduced to represent the chaotic trajectories of magnetic field lines in the scrape-off layer of a single-null divertor tokamak. Good surfaces of this map are very nearly axisymmetric. Therefore it gives a far better representation of the magnetic topology of a single-null divertor tokamak. The map is investigated in detail and used to analyze the generic features of the field line trajectories and their footprint on the divertor plate. The map is employed to calculate the variations in the fraction of magnetic flux from the stochastic layer diverted onto plate, in the footprint and in related parameters as the map parameter is varied. The Lyapunov exponents and the field diffusion coefficients are calculated. The low mode number map and the dipole map are introduced to include the effects of low and high mode number perturbations in the new map. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 466902
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 4; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
DIFFUSION
DIVERTORS
MAGNETIC CONFINEMENT
MAGNETIC FIELDS
MAGNETIC FLUX
MAPS
PLASMA SCRAPE-OFF LAYER
STOCHASTIC PROCESSES
TOKAMAK DEVICES
TRAJECTORIES