"Waves and turbulence in the near-Earth solar wind"

Yasuhito Narita
(Technical University Braunschweig, Germany)

Large-amplitude fluctuations of the interplanetary magnetic field are believed to represent turbulence in the solar wind.
While many spacecraft have visited the solar wind and revealed its fluctuation properties since the 1960s, the earlier
studies were based on single-spacecraft measurements and the data analyses were primarily limited to the one-dimensional
temporal domain. The Cluster mission is unique in space plasma experiments in that it performs four-spacecraft measurements.
Therefore Cluster enables us for the first time to distinguish between temporal and spatial variations in the measurements
and to determine the three-dimensional spatial structure of solar wind turbulence. In the seminar, the analysis methods for
Cluster data are reviewed and recent results about wave-vector anisotropy in solar wind turbulence are discussed.