A field–particle correlation analysis of a perpendicular magnetized collisionless shock
A field–particle correlation analysis of a perpendicular magnetized collisionless shock
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DOI：
10.1017/s0022377821000623
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发表时间：
2020-11
影响因子：
2.5
通讯作者：
J. Juno;G. Howes;J. TenBarge;L. Wilson;A. Spitkovsky;D. Caprioli;K. Klein;A. Hakim
中科院分区：
文献类型：
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作者：
J. Juno;G. Howes;J. TenBarge;L. Wilson;A. Spitkovsky;D. Caprioli;K. Klein;A. Hakim
利用场-粒子关联技术，我们研究了垂直磁化无碰撞激波的三维（一维和二维速度维; 1D-2 V）连续Vlasov-Maxwell模拟中的粒子运动。场-粒子相关技术与由弗拉索夫方程的直接离散化提供的粒子分布函数的高保真表示相结合，使我们能够确定相空间中电磁场和粒子之间的能量交换的细节。我们确定的速度空间签名的冲击漂移加速的离子和绝热加热的电子所产生的垂直碰撞无冲击，通过构建一个简化的模型，所需的最小成分，以产生所观察到的电子签名的自洽弗拉索夫-麦克斯韦模拟。因此，我们能够完全描述这里考虑的垂直无碰撞冲击的能量转移，并提供预测的应用领域粒子相关技术的航天器测量的无碰撞冲击。
Using the field–particle correlation technique, we examine the particle energization in a three-dimensional (one spatial dimension and two velocity dimensions; 1D-2V) continuum Vlasov–Maxwell simulation of a perpendicular magnetized collisionless shock. The combination of the field–particle correlation technique with the high-fidelity representation of the particle distribution function provided by a direct discretization of the Vlasov equation allows us to ascertain the details of the exchange of energy between the electromagnetic fields and the particles in phase space. We identify the velocity-space signatures of shock-drift acceleration of the ions and adiabatic heating of the electrons arising from the perpendicular collisionless shock by constructing a simplified model with the minimum ingredients necessary to produce the observed energization signatures in the self-consistent Vlasov–Maxwell simulation. We are thus able to completely characterize the energy transfer in the perpendicular collisionless shock considered here and provide predictions for the application of the field–particle correlation technique to spacecraft measurements of collisionless shocks.