Impact of punctual flat magnetic shear on the field line transport

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4923016· OSTI ID:22490933

Abud, C. V., E-mail: [e-mail] ^[1]; Physics Institute, Universidade de São Paulo, 05315-970 São Paulo ^[2]; Caldas, I. L., E-mail: [e-mail] ^[3]

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1. Department of Mathematics IMTec, Universidade Federal de Goás, 75704-020 Catalão (Brazil)
2. (Brazil)
3. Physics Institute, Universidade de São Paulo, 05315-970 São Paulo (Brazil)

We investigate the magnetic field line transport for tokamak equilibria with monotonic magnetic shear perturbed by resonant fields. We show that when the local profile is flat at the plasma edge a transport barrier can be created leading to a field line transport reduction. This transport reduction is due to the field lines topological modifications, caused by a local flattened profile that reduces the global field lines escape pattern. The results are obtained by applying a symplectic map that describes perturbed magnetic field lines in large aspect ratio tokamaks.

• OSTI ID: 22490933
• Journal Information: Physics of Plasmas, Vol. 22, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASPECT RATIO
EDGE LOCALIZED MODES
MAGNETIC FIELDS
PLASMA
SHEAR
TOKAMAK DEVICES
TOPOLOGY