000124911 001__ 124911
000124911 005__ 20190316234304.0
000124911 0247_ $$2doi$$a10.1063/1.2899303
000124911 02470 $$2DAR$$a12625
000124911 02470 $$2ISI$$a000254537900008
000124911 037__ $$aARTICLE
000124911 245__ $$aTransition from drift to interchange instabilities in an open magnetic field line configuration
000124911 269__ $$a2008
000124911 260__ $$c2008
000124911 336__ $$aJournal Articles
000124911 520__ $$aThe 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. ©2008 American Institute of Physics
000124911 6531_ $$aTORPEX group
000124911 700__ $$0240121$$g151730$$aPoli, F. M.
000124911 700__ $$0240122$$g176621$$aRicci, P.
000124911 700__ $$g105078$$aFasoli, A.$$0240112
000124911 700__ $$g150065$$aPodesta, M.$$0240069
000124911 773__ $$j15$$tPhys. Plasmas$$k032104
000124911 8564_ $$uhttp://link.aip.org/link/?PHPAEN/15/032104/1$$zURL
000124911 8564_ $$uhttps://infoscience.epfl.ch/record/124911/files/Poli_PhysPlasmas_15_032104_2008.pdf$$zn/a$$s849771$$yn/a
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000124911 937__ $$aCRPP-ARTICLE-2008-008
000124911 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000124911 980__ $$aARTICLE