Bulk ion acceleration and particle heating during magnetic reconnection in a laboratory plasmaa)
Bulk ion acceleration and particle heating during magnetic reconnection in a laboratory plasmaa)
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实验室等离子体中磁重联过程中的体离子加速和粒子加热a)
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Myers
中科院分区：
文献类型：
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作者：
J. Yoo;M. Yamada;H. Ji;J. Jara;C. Myers
在磁重联实验（MRX）的无碰撞等离子体中，研究了磁重联过程中的体离子加速和粒子加热。等离子体处于双流体状态，其中离子的运动与离子扩散区域内的电子的运动解耦。这里研究的重联过程是准对称的，因为等离子体参数，如重联磁场的大小，等离子体密度和温度是兼容的电流片的每一侧。我们的实验数据表明，面内（霍尔）电场在离子加热和加速中起着关键作用。产生面内电场的静电势由在电子扩散区域附近加速的电子建立。该静电势的面内轮廓示出了沿垂直于重连电流片的方向沿着的"阱"结构。该井随着其边界沿着纵剖面的扩展，其下游变深变宽。
Bulk ion acceleration and particle heating during magnetic reconnection are studied in the collisionless plasma of the Magnetic Reconnection Experiment (MRX). The plasma is in the two-fluid regime, where the motion of the ions is decoupled from that of the electrons within the ion diffusion region. The reconnection process studied here is quasi-symmetric since plasma parameters such as the magnitude of the reconnecting magnetic field, the plasma density, and temperature are compatible on each side of the current sheet. Our experimental data show that the in-plane (Hall) electric field plays a key role in ion heating and acceleration. The electrostatic potential that produces the in-plane electric field is established by electrons that are accelerated near the electron diffusion region. The in-plane profile of this electrostatic potential shows a “well” structure along the direction normal to the reconnection current sheet. This well becomes deeper and wider downstream as its boundary expands along the sep...