Neoclassical magnetic microislands in tokamaks

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2033688· OSTI ID:20764530

Kovalishen, E A; Mikhailovskii, A B; Botov, P V ^[1]; Shirokov, M S ^[1]; Konovalov, S V ^[1]; Tsypin, V S ^[2]; Galvao, R M.O. ^[2]

---

1. Institute of Nuclear Fusion, Russian Research Centre 'Kurchatov Institute', Kurchatov Sq., 1, Moscow 123182 (Russian Federation)
2. Physics Institute, University of Sao Paulo, Cidade Universitaria, 05508-900, Sao Paulo (Brazil)

Possibility of existence of neoclassical magnetic microislands (island width smaller than the ion Larmor radius) in a tokamak in the banana regime is shown. The rotation frequency of such islands is found. It is shown that for the case of positive electron temperature gradient, the bootstrap current destabilizes the microislands while the polarization current leads to their stabilization. Maximally possible neoclassical microisland width is estimated.

• OSTI ID: 20764530
• Journal Information: Physics of Plasmas, Vol. 12, Issue 9; Other Information: DOI: 10.1063/1.2033688; (c) 2005 American Institute of Physics; 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
BANANA REGIME
BOOTSTRAP CURRENT
CHARGED-PARTICLE TRANSPORT
ELECTRON TEMPERATURE
ION COLLISIONS
ION TEMPERATURE
IONS
LARMOR RADIUS
MAGNETIC CONFINEMENT
MAGNETIC ISLANDS
MAGNETOHYDRODYNAMICS
NEOCLASSICAL TRANSPORT THEORY
PLASMA
PLASMA INSTABILITY
POLARIZATION
ROTATION
TEMPERATURE GRADIENTS
TOKAMAK DEVICES