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Statistics of low-frequency plasma fluctuations in a simple magnetized torus
2003 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 10, no 7, 2686-2695 p.Article in journal (Refereed) Published
Abstract [en]

Statistical analysis is performed on time series of plasma potential and electron pressure fluctuations for two particular plasma states in a simple magnetized torus. In spite of the occurrence of cyclic trends in the signals, the analysis demonstrates the existence of long-range dependence on much longer time-scales than the plasma confinement time, and both Gaussian and non-Gaussian self-affinity is demonstrated in the probability distribution functions (PDFs) of increasingly coarse grained time series. Non-Gaussian PDFs for electron pressure fluctuations p are believed to arise from a nonlinear relationship between p and the plasma potential V. Non-Gaussian PDFs for V are well approximated by distributions derived from extreme value statistics.

Place, publisher, year, edition, pages
2003. Vol. 10, no 7, 2686-2695 p.
Keyword [en]
probe measurements, self-similarity, range, transport, universality, temperature, dependence
Identifiers
URN: urn:nbn:se:kth:diva-22599DOI: 10.1063/1.1577567ISI: 000183585500009OAI: oai:DiVA.org:kth-22599DiVA: diva2:341297
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Ratynskaia, Svetlana V.

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