The influence of the ion polarization current on magnetic island stability in a tokamak plasma
The influence of the ion polarization current on the stability of a constant- magnetic island in a tokamak plasma is investigated numerically using a reduced two-fluid model in two-dimensional slab ge...
The influence of the ion polarization current on the stability of a constant- magnetic island in a tokamak plasma is investigated numerically using a reduced two-fluid model in two-dimensional slab ge...
Critical transition for the edge shear layer formation: Comparison of model and experiment
The experimental results for the emergence of the plasma edge shear flow layer in TJ-II [C. Alehaldre et al.Fusion Technol. 17, 131 (1990)] can be explained using a simple model for a second-order tra...
The experimental results for the emergence of the plasma edge shear flow layer in TJ-II [C. Alehaldre et al.Fusion Technol. 17, 131 (1990)] can be explained using a simple model for a second-order tra...
Isothermal tokamak
Phys. Plasmas 13, 122508 (2006); doi:10.1063/1.2403090
Published 19 December 2006
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An isothermal tokamak, Isomak, is investigated to demonstrate that nearly exact, rigidly toroidally rotating Maxwellian solutions exist for both the ions and the electrons. For the ions this Maxwellian solution is valid in the limit in which unlike collisions of the ions with the electrons are weak and the induced electric field unimportant, while for Maxwellian electrons unlike collisions can be retained as long as the friction with the ions is small (electron-ion collision frequency smaller than the electron gyrofrequency). In such cases magnetically confined, exponentially decaying density profiles are allowed, minimizing contact with the wall or limiter. Indeed, the near Maxwellian behavior assures that radial particle and heat fluxes are small. In fact, for specially tailored ion and electron current drives it is possible to maintain the Maxwellians as exact steady state solutions of the full ion and electron kinetic equations. Three reasons to consider an Isomak are its usefulness as an ideal tokamak reference, its possible relevance to lithium-walled tokamaks, and its value in checking codes in the isothermal limit.
©2006 American Institute of Physics
| History: | Received 11 October 2006; accepted 8 November 2006; published 19 December 2006 |
| Permalink: |
http://link.aip.org/link/?PHPAEN/13/122508/1 |
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BibSonomy
KEYWORDS and PACS
Tokamak devices,
plasma toroidal confinement,
plasma flow,
plasma density,
plasma-wall interactions,
plasma transport processes,
plasma kinetic theory
- 52.55.Fa
Tokamaks - 52.55.Wq
Current drive; helicity injection in magnetic plasma confinement - 52.20.Fs
Electron collisions in plasma - 52.20.Hv
Atomic, molecular, ion, and heavy-particle collisions in plasma - 52.40.Hf
Plasma–material interactions; boundary layer effects - 52.25.Fi
Plasma transport properties - YEAR: 2006
RELATED DATABASES
PUBLICATION DATA
1070-664X (print)
1089-7674 (online)
AIP
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