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Title: Three-dimensional linear peeling-ballooning theory in magnetic fusion devices

Ideal magnetohydrodynamics theory is extended to fully 3D magnetic configurations to investigate the linear stability of intermediate to high n peeling-ballooning modes, with n the toroidal mode number. These are thought to be important for the behavior of edge localized modes and for the limit of the size of the pedestal that governs the high confinement H-mode. The end point of the derivation is a set of coupled second order ordinary differential equations with appropriate boundary conditions that minimize the perturbed energy and that can be solved to find the growth rate of the perturbations. This theory allows of the evaluation of 3D effects on edge plasma stability in tokamaks such as those associated with the toroidal ripple due to the finite number of toroidal field coils, the application of external 3D fields for elm control, local modification of the magnetic field in the vicinity of ferromagnetic components such as the test blanket modules in ITER, etc.
Authors:
; ;  [1] ; ;  [2]
  1. Departamento de Física, Universidad Carlos III de Madrid, Madrid 28911 (Spain)
  2. ITER Organization, Route de Vinon sur Verdon, 13067 Saint Paul Lez Durance (France)
Publication Date:
OSTI Identifier:
22253070
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BALLOONING INSTABILITY; DIFFERENTIAL EQUATIONS; EDGE LOCALIZED MODES; H-MODE PLASMA CONFINEMENT; ITER TOKAMAK; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; PERTURBATION THEORY; PLASMA