题目：Perpendicular Flow Separation in a Magnetized Counterstreaming Plasma

主讲：贾英东 博士

时间：2011年8月19日(星期五)下午4:20 - 5:10

地点：学术报告厅

报告简介：

The interaction of charged dust with a magnetized flowing plasma can be treated with a multi-fluid MHD simulation. We examine the interaction of the corotating Saturnian plasma with the charged-dust plume of Enceladus. The model produces plasma deceleration with both positively and negatively charged dust. In addition, the negatively charged dust causes plasma deflection in the direction of the motional electric field and a kink in the magnetic field extending in the same direction. Positively charged dust causes the opposite plasma deflection and the opposite magnetic field bending. These results agree with the magnetic signatures observed on Cassini plume flybys. The code has been tested on both subsonic and supersonic interactions and is applicable to solar wind dust pickup, ICME interactions with dust trails, cometary plasma pickup, active plasma releases such as the AMPTE barium release as well as the Enceladus plume.

报告人简介：

Jia, Yingdong, Assistant Research Geophysicist, IGPP, UCLA

Ph.D Univ. of Michigan, 2007, Atmospheric and Space Science

Research Interests

Study of the interaction between magnetized plasma and non-magnetized or weakly magnetized solar system bodies including planets, moons, and comets. MHD and hybrid modeling of the interaction between magnetic field and mass-loaded plasma. Study of charged dusts in the interplanetary space and their interaction with the ambient plasma.