Energy Balance and Time Dependence of a Magnetotail Electron Diffusion Region

D. S. Payne; K. J. Genestreti; K. GermaschewskiM. R. ArgallR. B. TorbertI. DorsA. Ardakani

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Energy Balance and Time Dependence of a Magnetotail Electron Diffusion Region

机译：能量平衡和时间依赖性磁尾电子扩散区域

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We examine the 11 July 2017 electron diffusion region (EDR)observed by the MagnetosphericMultiscale (MMS) mission using Poynting's theorem. The terms in Poynting's theorem are determined using a linear gradient approximation to obtain barycentric averages within the MMS tetrahedron. We find that Poynting's theorem is approximately balanced in the EDR and the balance is improved if the calculation of ? · S is restricted to the LN plane. The work rate per unit volume J·E is mostly balanced by the divergence of the electromagnetic energy flux ? · S, indicating that the electromagnetic energy density remains relatively constant within the EDR during the encounter. We also use particle-in-cell (PIC) simulations to examine Poynting's theorem near an x line evolving in time. The central EDR in the simulation is characterized by approximate time independent balance in Poynting's theorem during reconnection growth, while the outer EDR exhibits time-dependent fluctuations indicative of more chaotic behavior.

机译：我们检查2017年7月11日电子扩散区域(EDR)观察到的MagnetosphericMultiscale (MMS)任务使用坡印亭定理。使用一个线性渐变定理确定近似获得重心平均水平在MMS四面体。坡印亭定理大约是平衡的如果功能和平衡是改善计算的?飞机。主要是平衡的散度电磁能量通量?的电磁能量密度仍然存在功能在产品内的相对稳定遇到。一个附近的模拟来研究坡印亭定理x线变化。仿真的特点是近似的独立的平衡在坡印亭定理重新连接增长,而外层EDR展品时间波动的更多的说明混乱的行为。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2020年第11期|2020JA028290-1-2020JA028290-8|共8页
作者
D. S. Payne; K. J. Genestreti; K. GermaschewskiM. R. ArgallR. B. TorbertI. DorsA. Ardakani;
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作者单位

Department of Physics and Astronomy & Space Science Center, University of New Hampshire, Durham, NH, USA;

Southwest Research Institute, Durham, NH, USA;

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正文语种英语
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关键词
TIME DEPENDENCE; energy balance; Energy sourceselectron diffusionTheoremchaosenergy densityElectromagnetic EnergiesENCOUNTERS;

机译：时间依赖性;能量平衡能量sourceselectron diffusionTheoremchaosenergydensityElectromagnetic EnergiesENCOUNTERS;

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Energy Balance and Time Dependence of a Magnetotail Electron Diffusion Region

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