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Transition from drift to interchange instabilities in an open magnetic field line configuration
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Poli, F. M. (Francesca), Ricci, P., Fasoli, A. and Podesta, M. (2008) Transition from drift to interchange instabilities in an open magnetic field line configuration. Physics of Plasmas, Vol.15 (No.3). Article No.032104. doi:10.1063/1.2899303 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.2899303
Abstract
The transition from a regime dominated by drift instabilities to a regime dominated by pure interchange instabilities is investigated and characterized in the simple magnetized toroidal device TORPEX [TORoidal Plasma EXperiment, A. Fasoli et al., Phys. of Plasmas 13, 055906 (2006)]. The magnetic field lines are helical, with a dominant toroidal component and a smaller vertical component. Instabilities with a drift character are observed in the favorable curvature region, on the high field side with respect to the maximum of the background density profile. For a limited range of values of the vertical field they coexist with interchange instabilities in the unfavorable curvature region, on the plasma low field side. With increasing vertical magnetic field magnitude, a gradual transition between the two regimes is observed on the low field side, controlled by the value of the field line connection length. The observed transition follows the predictions of a two-fluid linear model. (C) 2008 American Institute of Physics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physics of Plasmas | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 1070-664X | ||||
Official Date: | March 2008 | ||||
Dates: |
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Volume: | Vol.15 | ||||
Number: | No.3 | ||||
Number of Pages: | 10 | ||||
Page Range: | Article No.032104 | ||||
DOI: | 10.1063/1.2899303 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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