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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71400

    Title: 木星環系統帶電粒子動力學分析與 全球碰撞分布地圖--為JUNO任務預測;Charged Dust Distribution and Impact map in Jovian Upper Atmosphere and Near Ring--Prediction for JUNO Mission
    Authors: 潘昆慶;Pan,Kun-Cing
    Contributors: 太空科學研究所
    Keywords: 木星;;塵埃;木星磁場;Jupiter;Ring;dust;Jovian magnetic field
    Date: 2016-08-24
    Issue Date: 2016-10-13 12:56:37 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 先前研究已指出會有微小帶電粒子從木星環噴發出來,而其運動方式也有非常豐碩的研究結果,過去的研究指出塵埃粒子表面的電荷變化以及其與木星電漿環境的電磁交互作用,會使得微小塵埃粒子帶電並沿著磁力線運動;而透過勞倫茲力以及木星重力的作用,微小塵埃粒子的最終宿命會與木星碰撞,而這過程僅僅只有數小時至數天之久。
    ;The orbital motion of charged nano-dust grains emitted from the Jovian rings is investigated. It is found that the combination of electrostatic charging and electromagnetic interaction can lead to a variety of circumplanetary non-Keplerian particle trajectories. Because of a combination of the Lorentz force and the Jovian gravitational attraction, the charged grains would impact Jupiter within a few to tens of hours. The impact points of dust grains with size larger than 100 nm are mostly distributed near the equatorial region while those of smaller sizes could reach mid-latitude due to magnetic field-aligned motion. If the mass injection rate is significant, the Jovian atmosphere might display signature of such ring rain effect.
    We discuss in the dynamics of nano-size charged dust particle in the innermost Jovian magnetosphere. In our simulation, we use observing data to construct our dynamical model and also consider the charging process. Assuming small dust particle generate by continual meteoroid bombardment of the larger bodies. We build model to simulate how surface potential of small dust particles change in the Jovian plasma condition and transform orbit by Lorentz force. Finally we construct the impact map of nano-size particle impact with Jovian. And we use model to make prediction for the dust impact direction for compare with the JUNO mission, which is traverse this region in 2016.
    Appears in Collections:[太空科學研究所 ] 博碩士論文

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