Structures and Intermittency in Small Scales Solar Wind Turbulence

Details Structures and Intermittency in Small Scales Solar Wind Turbulence Structures and Intermittency in Small Scales Solar Wind Turbulence

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..140s&link_type=abstract

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 140-143 (2010).

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Solar Wind, Synchronization, Interplanetary Magnetic Fields, Gyromagnetic Effect, Particle Emission, Solar Wind, Synchronization, Coupled Oscillators, Interplanetary Magnetic Fields, Gyrokinetics

Scientific paper

Several observations in space plasmas have reported the presence of coherent structures at different plasma scales. Structure formation is believed to result from nonlinear interactions between the plasma modes, which depend strongly on their phase synchronization. Despite this important role of the phases in turbulence, very limited work has been devoted to study the phases as potential tracers of nonlinearities in comparison with the wealth of literature on power spectra of turbulence where phases are totally missed. The reason why the phases are seldom used is probably because they usually appear to be completely mixed (due to their dependence on an arbitrary time origin and to 2π periodicity). To handle the phases properly, a new method based on using surrogate data has been developed recently to detect coherent structures in magnetized plasmas [Sahraoui, PRE, 2008]. Here, we show new applications of the technique to study the nature (weak vs strong, self-similar vs intermittent) of the small scale turbulence in the solar wind using the Cluster observations.

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