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Local plasma parameter measurements in colliding laser-produced plasmas for studying magnetic reconnection
High Energy Density Physics ( IF 1.6 ) Pub Date : 2020-03-09 , DOI: 10.1016/j.hedp.2020.100754
T. Morita , K. Tomita , K. Sakai , M. Takagi , K. Aihara , M. Edamoto , S. Egashira , T. Higuchi , N. Ishizaka , T. Izumi , S. Kakuchi , T. Kojima , Y. Kuramitsu , S. Matsukiyo , Y. Nakagawa , T. Minami , H. Murakami , Y. Nishioka , M. Ota , T. Sano , S. Sei , K. Sugiyama , S.J. Tanaka , R. Yamazaki , Y. Sakawa

We have implemented laser Thomson scattering for local plasma measurement of electron and ion temperatures, electron density, flow velocity, and charge state. The electron density increases by two times in the interaction of two plasma flows, indicating collisionless interaction. The density and velocity show fluctuations only at t=40 ns, and the density suddenly decreases, indicating the plasma ejection from the interaction region, which can be explained by a magnetic reconnection. The electron temperature in the double-flow is larger than that in the single flow. This may be explained by the energy transfer from the plasma kinetic energy to thermal energy. The ion temperature is much larger than electron temperature in the double-flow, and this may be explained by collisional effects between two plasmas, and/or possibly interpreted as a thermalization due to magnetic reconnection.



中文翻译:

碰撞产生的等离子体中的局部等离子体参数测量,用于研究磁重新连接

我们已经实施了激光汤姆逊散射技术,用于电子和离子温度,电子密度,流速和电荷状态的局部等离子体测量。在两个等离子体流的相互作用中,电子密度增加了两倍,表明无碰撞相互作用。密度和速度仅在Ť=40ns,并且密度突然降低,表明等离子体从相互作用区域中喷出,这可以用磁重联来解释。双流中的电子温度高于单流中的电子温度。这可以通过从等离子体动能到热能的能量转移来解释。离子温度比双流中的电子温度大得多,这可以用两个等离子体之间的碰撞效应来解释,和/或可能解释为由于磁重新连接而引起的热化。

更新日期:2020-03-09
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