Electron temperature difference between the o-point and x-point of a magnetic island
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
- Max-Planck-Institute fuer Plasmaphysik, EURATOM Association, 85748 Garching (Germany)
- College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)
The electron temperature difference between the o-point and the x-point of a magnetic island is studied numerically by solving the two-dimensional energy transport equation. It is found that, even without a localized radio-frequency heating at the island's o-point, there is usually a temperature difference between these two points. This difference depends on the radial profile of the heating power deposition, the ratio between the parallel and the perpendicular heat conductivity and the island width, and it takes a minimum when the island width is about twice the local heat diffusion layer width. The effect of the temperature difference on the island growth is further studied, and the peaked heating power density profile at magnetic axis is found be destabilizing.
- OSTI ID:
- 21282102
- Journal Information:
- Physics of Plasmas, Vol. 16, Issue 9; Other Information: DOI: 10.1063/1.3240329; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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