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Sign-Singularity of the Reduced Magnetic Helicity in the Solar Wind Plasma
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2010 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 104, no 18, 181101- p.Article in journal (Refereed) Published
Abstract [en]

We investigate the scaling laws of a signed measure derived from the reduced magnetic helicity which has been determined from Cluster data in the solar wind. This quantifies the handedness of the magnetic field; namely, it can be related to the polarization of the magnetic field fluctuations (right or left hand). The measure results to be sign-singular; that is, we do not observe any scale-dependent effect at the ion-and at electron-cyclotron frequencies. Cancellations between right-and left-hand polarizations go on in the dispersive or dissipative range, beyond the electron-cyclotron frequency. This means that the mechanism responsible for the generation of the dispersive or dissipative range is rather insensitive to the polarization of the magnetic field fluctuations.

Place, publisher, year, edition, pages
2010. Vol. 104, no 18, 181101- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-147242DOI: 10.1103/PhysRevLett.104.181101ISI: 000277417500007OAI: oai:DiVA.org:uu-147242DiVA: diva2:400075
Available from: 2011-02-24 Created: 2011-02-24 Last updated: 2017-12-11Bibliographically approved

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