Mathematics – Probability
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..136k&link_type=abstract
TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 136-139 (2010).
Mathematics
Probability
Solar Wind, Interplanetary Magnetic Fields, Probability, Plasma Turbulence, Particle Emission, Solar Wind, Interplanetary Magnetic Fields, Probability Theory, Plasma Turbulence
Scientific paper
A robust multiscale analysis of high-frequency magnetic field measurements from the Cluster spacecraft is presented using complimentary measurements from the magnetometer and search-coil instruments; in a stationary interval of fast ambient solar wind. We show a surprising and novel result: that for time-scales smaller than the ion-gyro period the magnetic field fluctuations exhibit non-Gaussian monoscaling i.e. are globally scale invariant and can be characterized by a single scaling exponent and thus a single universal scaling function for the probability density. This presents new questions, as well as theoretical constraints, for determining how magnetic turbulent energy is dissipated in collisionless plasmas.
Chapman Sandra
Dunlop Malcolm
Khotyaintsev Yu.
Kiyani Khurom
Sahraoui Fouad
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