| Issue |
EPL
Volume 85, Number 2, January 2009
|
|
|---|---|---|
| Article Number | 25004 | |
| Number of page(s) | 6 | |
| Section | Physics of Gases, Plasmas and Electric Discharges | |
| DOI | https://doi.org/10.1209/0295-5075/85/25004 | |
| Published online | 02 February 2009 | |
Drift-sound and drift-Alfvén eigenmodes in toroidal plasmas
1
Institute for Nuclear Research, National Academy of Sciences of Ukraine - Prospekt Nauky 47, Kyiv 03680, Ukraine
2
Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association - D-17491 Greifswald, Germany, EU
Corresponding author: yk@kinr.kiev.ua
Received:
21
November
2008
Accepted:
5
January
2009
Equations describing eigenmodes with the frequencies of the order of the geodesic acoustic frequency and the electron/ion diamagnetic frequency in toroidal plasmas are derived and analyzed, a code solving them is developed. It is shown that there exist drift-sound eigenmodes and a new kind of drift-Alfvén eigenmodes. This is done by means of an analytical consideration and numerical modelling of particular discharges in the stellarator Wendelstein 7-AS.
PACS: 52.30.Ex – Two-fluid and multi-fluid plasmas / 52.35.-g – Waves, oscillations, and instabilities in plasmas and intense beams / 52.55.Hc – Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices
© EPLA, 2009
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