嘉宾(Presenter)：Prof. Hiroshi Hasegawa

时间（Date & Time）：May 17, 2019, 09:00-10:00（周五）

地点(Venue):闻天楼南楼211, Wentian Building

题目(Title)：Reconstruction of magnetotail reconnection regions observed by Magnetospheric Multiscale

Abstract:

Magnetic reconnection controls the transport of solar wind mass and energy into Earth’s magnetosphere and explosive energy release in the magnetotail during the course of aurora expansions or substorms. A simplest form of reconnection in space occurs in the magnetotail where the magnetic field is antiparallel and no significant jumps in plasma parameters exist across its current sheet, and where the Magnetospheric Multiscale (MMS) spacecraft made unprecedented high-resolution measurements in 2017. We present structures of magnetotail reconnection regions visualized from the MMS observations, focusing on their complexities and three-dimensional aspects despite the simple boundary conditions.

主讲人简介（Bio）:

Hiroshi Hasegawa is an assistant professor at Institute of Space and Astronautical Science of JAXA (Japan Aerospace Exploration Agency) since 2006. After receiving his PhD with a Space Physics specialty at Nagoya University, he worked as a postdoc at Dartmouth College and Tokyo Institute of Technology. His research interests include the interaction of the solar wind with planetary magnetospheres, and fundamental processes in collisionless plasmas such as Kelvin-Helmholtz instability and magnetic reconnection. He currently serves as an associate editor for Journal of Geophysical Research: Space Physics and project scientist for the Geotail mission.

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