Japan Geoscience Union Meeting 2016

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International Session (Poster)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM06] Magnetospheric Multi-Scale (MMS) mission -- A new age of magnetospheric physics

Tue. May 24, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Seiji Zenitani(National Astronomical Observatory of Japan), Naritoshi Kitamura(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Yoshifumi Saito(Solar System Science Division, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Paul Cassak(West Virginia University), Li-Jen Chen(NASA Goddard Space Flight Center), Craig Pollock(NASA Goddard Space Flight Center)

5:15 PM - 6:30 PM

[PEM06-P08] Flapping current sheet motions excited by non-adiabatic ions in near-Earth magnetotail

*xinhua wei1 (1.State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences)

Keywords:current sheet , flapping, non-adiabatic ions

The current sheet is a crucial region of the magnetotail, where energy reserve and release take place. The origin of the up-down motions of the current sheet, referred to as flapping motions, is among the most fundamental issues of magnetotail dynamics. Obervational evidences suggest that the flapping motion is a kind of internal excited kink-like waves, but its particular propagating featueres such as the low phase speeds and the propagating direction from the tail center toward flanks do not match any local generation mechnisms prevrioudly established so far. Here we report observations of the current sheet flapping motions induced by non-adiabatic ions in the magentic field configurations with a finite guiding component, whose population present periodic hemispherical aymmetries.