Tearing instability in a tokamak with a noncircular cross section
- Авторы: Arsenin V.1, Skovoroda A.1
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Учреждения:
- National Research Center Kurchatov Institute
- Выпуск: Том 42, № 12 (2016)
- Страницы: 1138-1145
- Раздел: Methodological Notes
- URL: https://journals.rcsi.science/1063-780X/article/view/186063
- DOI: https://doi.org/10.1134/S1063780X16120023
- ID: 186063
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Аннотация
Using a straight-column model to describe tokamak plasma with a noncircular cross section, it is shown how to (i) find the boundary of tearing instability from the condition of existence of a magnetohydrodynamic plasma equilibrium different from that of a straight cylinder by solving a two-dimensional linear boundary-value problem with a second-order equation with respect to the flux coordinate and (ii) find the spatial structure of the tearing mode and the corresponding effective Δ' when there is only one resonance magnetic surface in the plasma for a given axial wavenumber by solving some kind of a boundary-value problem for the perturbation. The proposed approach is illustrated by numerical calculations for the case of an elliptical cross section as an example.
Об авторах
V. Arsenin
National Research Center Kurchatov Institute
Автор, ответственный за переписку.
Email: arsenin_vv@nrcki.ru
Россия, Moscow, 123098
A. Skovoroda
National Research Center Kurchatov Institute
Email: arsenin_vv@nrcki.ru
Россия, Moscow, 123098