On nonlinear cascades and resonances in the outer magnetosphere
S. Savina, E. Amatab, V. Budaeva,g, L. Zelenyia, E. A. Kronbergc, J. Buechnerc, J. Safrankovad, Z. Nemecekd, J. Bleckie, L. Kozakf, S. Klimova, A. Skalskya, L. Lezhena
aIKI, Lab545, Moscow, Russia
bIFSI, Roma, Italy
cMax-Planck Institute for Solar System Research, 70569 Stuttgart, Germany
dCharles University, 11636 Prague, Czech Republic
eSpace Research Center, 57622 Warsaw, Poland
fKyiv Taras Shevchenko University, 01601 Kyiv, Ukraine
gNational Research Centre Kurchatov Institute, 123182 Moscow, Russia
Abstract
The paper addresses nonlinear phenomena that control
the interaction between plasma flow (solar wind)
and magnetic barrier (magnetosphere). For the first time we
demonstrate that the dominant solar wind
kinetic energy: (1) excites boundary resonances and their
harmonics which modulate plasma jets under
the bow shock; (2) produces discrete 3-wave cascades,
which could merge into a turbulent-like one; (3)
jet produced cascades provide the effective anomalous
plasma transport inside and out of the
magnetosphere; (4) intermittency and multifractality
characteristics for the statistic properties of jets
result in a super-ballistic turbulent transport regime.
Our results could be considered as suggestive for the
space weather predictions, for turbulent cascades
in different media and for the laboratory plasma confinement
(e.g. for fusion devices).