ИСТИНА

We present the results of the study of statistical and spectral properties of the solar wind turbulent plasma fluctuations on scales up to 0.03 s. The analysis is based on systematical high resolution measurements of BMSW plasma spectrometer on board of SPECTR-R spacecraft. The non-Gaussian probability distribution functions of ion flux fluctuations are observed on discussed scales. We produce the analysis of high order structure functions and demonstrate the high level of intermittency. The extended self-similarity of solar wind ion flux turbulent flow is constantly also observed. We compare statistical characteristics of ion flux fluctuations with predictions of different models and prove the advantages of log-Poisson model. We implement the parameterization of scaling of structure functions with this model and show that the statistic of parameterization indexes demonstrates the dominant contribution of filament-like structures to the turbulent processes in the solar wind. The dependence of statistical properties of ion flux fluctuations from the solar wind parameters is observed. The turbulent spectra of solar wind ion flux fluctuations in the range of scales between 0.03 up to 100 s are systematically analyzed. The relation of spectral and statistical properties is discussed. We compare also the observed turbulent properties in solar wind and Earth’s magnetosheath in order to understand how the turbulence of solar wind is modified in magnetosheath prior to the impact to the Earth’s magnetosphere.