Grad-Shafranov Equilibria with Negative Core Toroidal Current in Tokamak Plasmas

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.015001· OSTI ID:20696427

Rodrigues, Paulo; Bizarro, Joao P.S. ^[1]

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1. Centro de Fusao Nuclear, Associacao Euratom-IST, Instituto Superior Tecnico, 1049-001 Lisbon (Portugal)

Numerical Grad-Shafranov (GS) equilibria with negative current density in the plasma core are computed which do not impose any particularly chosen models for the pressure and current-density profiles. This flexibility allows the profiles to be tailored so that an island unfolds in the low-field side, even for elongated plasmas, thus sustaining the negative-current core against outward forces. Among other topological results, reversed GS equilibria are also shown to be necessarily non-nested, except for the cylindrical and other very special degenerate, hence structurally unstable cases.

• OSTI ID: 20696427
• Journal Information: Physical Review Letters, Vol. 95, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.95.015001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURRENT DENSITY
PLASMA
PLASMA SIMULATION
TOKAMAK DEVICES
TOPOLOGY