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Instabilities responsible for magnetic turbulence in laboratory rotating plasma |
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| Authors: | AB Mikhailovskii AP Churikov VD Pustovitov SV Konovalov |
| Institution: | a Institute of Nuclear Fusion, Russian Research Centre Kurchatov Institute, 1, Kurchatov Sq., Moscow 123182, Russia b Kharadze Abastumani National Astrophysical Observatory, 2a, Kazbegi Ave., Tbilisi 0160, Georgia c Nodia Institute of Geophysics, 1, Aleksidze street, Tbilisi 0193, Georgia d Syzran Branch of Samara Technical University, 45, Sovetskaya street, Syzran, Samara Region 446001, Russia |
| Abstract: | Instabilities responsible for magnetic turbulence in laboratory rotating plasma are investigated. It is shown that the plasma compressibility gives a new driving mechanism in addition to the known Velikhov effect due to the negative rotation frequency gradient. This new mechanism is related to the perpendicular plasma pressure gradient, while the density gradient gives an additional drive depending also on the pressure gradient. It is shown that these new effects can manifest themselves even in the absence of the equilibrium magnetic field, which corresponds to nonmagnetic instabilities. |
| Keywords: | 52 35 Mw 52 35 Bj 94 30 Cq |
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