Structures and Intermittency in Small Scales Solar Wind Turbulence

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...

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Hauptverfasser:	Sahraoui, Fouad, Goldstein, M. L.
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Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY COMPARATIVE EVALUATIONS EVALUATION INTERPLANETARY MAGNETIC FIELDS MAGNETIC FIELDS NONLINEAR PROBLEMS PERIODICITY PHYSICS PLASMA Plasma Physics SOLAR ACTIVITY SOLAR WIND SPACE VEHICLES STELLAR ACTIVITY STELLAR WINDS SYNCHRONIZATION TURBULENCE VARIATIONS VEHICLES
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description	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 2pi 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.
doi_str_mv	10.1063/1.3395820
format	Conference Proceeding
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subjects	70 PLASMA PHYSICS AND FUSION TECHNOLOGY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY COMPARATIVE EVALUATIONS EVALUATION INTERPLANETARY MAGNETIC FIELDS MAGNETIC FIELDS NONLINEAR PROBLEMS PERIODICITY PHYSICS PLASMA Plasma Physics SOLAR ACTIVITY SOLAR WIND SPACE VEHICLES STELLAR ACTIVITY STELLAR WINDS SYNCHRONIZATION TURBULENCE VARIATIONS VEHICLES
title	Structures and Intermittency in Small Scales Solar Wind Turbulence
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