Multiscale, Intermittent, Turbulent Fluctuations in Space Plasmas and Their Influence on the Interscale Behavior of the Space Environment.

摘要

We have completed all the goals for this research grant. Our innovative method ROMA (rank-ordered multifractal analysis) has been applied to the multi-parameter phenomenon of intermittent turbulence in space involving temporal and spatial scales ranging from the kinetic to the MHD regime. Detailed analyses of magnetic field intensity fluctuations in the inhomogeneous regions of the cusp and magnetosheath have been performed using data obtained by the CLUSTER spacecraft. We developed a new theoretical technique called DSRG (direct simulation renormalization group) capable of predicting complicated multifractal properties of intermittency events in space plasmas. Simultaneously, we have developed new large-scale simulation techniques useful for the analyses of intermittent turbulence phenomena in the fluid medium as well as magnetized plasmas. We interacted with Dr. J.R. Jasperse at AFRL/Hanscom (now at Boston College) on the understanding of particle interactions with intermittent plasma turbulence. We published a number of peer- reviewed research publications and invited lectures at international conferences.