Отправить статью по E-mail Drift and geodesic effects on the ion sound eigenmode in tokamak plasmas
- Авторы: Elfimov A.G.1, Smolyakov A.I.2,3, Melnikov A.V.3,4, Galvão R.M.1
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Учреждения:
- Institute of Physics
- University of Saskatchewan
- National Research Centre Kurchatov Institute
- National Research Nuclear University MEPhI
- Выпуск: Том 42, № 5 (2016)
- Страницы: 424-429
- Раздел: Waves and Instabilities in Plasma
- URL: https://journal-vniispk.ru/1063-780X/article/view/185712
- DOI: https://doi.org/10.1134/S1063780X16050032
- ID: 185712
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Аннотация
A kinetic treatment of geodesic acoustic modes (GAMs), taking into account ion parallel dynamics, drift and the second poloidal harmonic effects is presented. It is shown that first and second harmonics of the ion sound modes, which have respectively positive and negative radial dispersion, can be coupled due to the geodesic and drift effects. This coupling results in the drift geodesic ion sound eigenmode with a frequency below the standard GAM continuum frequency. Such eigenmode may be able to explain the split modes observed in some experiments.
Об авторах
A. Elfimov
Institute of Physics
Автор, ответственный за переписку.
Email: elfimov@if.usp.br
Бразилия, San Paulo
A. Smolyakov
University of Saskatchewan; National Research Centre Kurchatov Institute
Email: elfimov@if.usp.br
Канада, 116 Science Place, Saskatoon; pl. Akademika Kurchatova 1, Moscow, 123182
A. Melnikov
National Research Centre Kurchatov Institute; National Research Nuclear University MEPhI
Email: elfimov@if.usp.br
Россия, pl. Akademika Kurchatova 1, Moscow, 123182; Kashirskoe sh. 31, Moscow, 115409
R. Galvão
Institute of Physics
Email: elfimov@if.usp.br
Бразилия, San Paulo
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