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On the scaling features of magnetic field fluctuations at non-MHD scales in turbulent space plasmas
INAF Ist Astrofis & Planetol Spaziali, Rome, Italy.
INAF Ist Astrofis & Planetol Spaziali, Rome, Italy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0002-9707-3147
Austrian Acad Sci, Space Res Inst, Graz, Austria.
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2016 (English)In: 15th Annual International Astrophysics Conference: "The Science Of Ed Stone: Celebrating His 80Th Birthday" / [ed] Zank, G P, 2016, article id 012003Conference paper, Published paper (Refereed)
Abstract [en]

In several different contexts space plasmas display intermittent turbulence at magneto-hydro-dynamic (MHD) scales, which manifests in anomalous scaling features of the structure functions of the magnetic field increments. Moving to smaller scales, i.e. below the ion-cyclotron and/or ion inertial length, these scaling features are still observed, even though its is not clear if these scaling features are still anomalous or not. Here, we investigate the nature of scaling properties of magnetic field increments at non-MHD scales for a period of fast solar wind to investigate the occurrence or not of multifractal features and collapsing of probability distribution functions (PDFs) using the novel Rank-Ordered Multifractal Analysis (ROMA) method, which is more sensitive than the traditional structure function approach. We find a strong evidence for the occurrence of a near mono-scaling behavior, which suggests that the observed turbulent regime at non-MHD scales mainly displays a mono-fractal nature of magnetic field increments. The results are discussed in terms of a non-compact fractal structure of the dissipation field.

Place, publisher, year, edition, pages
2016. article id 012003
Series
Journal of Physics Conference Series, ISSN 1742-6588, E-ISSN 1742-6596 ; 767
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-400851DOI: 10.1088/1742-6596/767/1/012003ISI: 000440359600003OAI: oai:DiVA.org:uu-400851DiVA, id: diva2:1382962
Conference
15th Annual International Astrophysics Conference - The Science of Ed Stone - Celebrating his 80th Birthday, APR 04-08, 2016, Westin Cape Coral Resort, Cape Coral, FL
Funder
EU, FP7, Seventh Framework Programme, 313038/STORMAvailable from: 2020-01-07 Created: 2020-01-07 Last updated: 2020-01-07Bibliographically approved

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Yordanova, Emiliya
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