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dc.contributor.authorRypdal, Kristoffer
dc.contributor.authorŽivkovic, Tatjana
dc.contributor.authorØstvand, Lene
dc.date.accessioned2009-09-24T11:27:39Z
dc.date.available2009-09-24T11:27:39Z
dc.date.issued2009-04-19
dc.description.abstractIn a toroidal plasma confined by a purely toroidal magnetic field the plasma transport is governed by electrostatic turbulence driven by the flute interchange instability on the low-field side of the torus cross section. In this paper we revisit experimental data obtained from the Blaamann torus at the University of Tromso. On time-scales shorter than the poloidal rotation time, the time series of potential and electron density fluctuations measured on stationary Langmuir probes essentially reflect the spatial poloidal structure of the turbulent field (Taylor hypothesis). On these time scales the signals reveals an intermittent character exposed via analysis of probability density functions and computation of multifractal dimension spectra in different regimes of time scales. This intermittency is associated with the shape and distribution of pronounced spikes in the signal. On time scales much longer than the rotation period there are strong global fluctuations in the plasma potential which are shown to to be the result of low-dimensional chaotic dynamics.en
dc.format.extent309080 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10037/2127
dc.identifier.urnURN:NBN:no-uit_munin_1878
dc.language.isoengen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437en
dc.titleBurst statistics of fluctuations in a simple magnetized torus configurationen
dc.typeWorking paperen
dc.typeArbeidsnotaten


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