气候变化领域集成服务门户(CCPortal): The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region

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DOI	10.1029/2020GL089778
	The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region
	Dokgo K.; Hwang K.-J.; Burch J.L.; Yoon P.H.; Graham D.B.; Li W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Using a two-dimensional particle-in-cell simulation, we investigate the effects and roles of upper-hybrid waves (UHW) near the electron diffusion region (EDR). The energy dissipation via the wave-particle interaction in our simulation agrees with J · E′ measured by magnetospheric multiscale (MMS) spacecraft. It means that UHW contributes to the local energy dissipation. As a result of wave-particle interactions, plasma parameters which determine the larger-scale energy dissipation in the EDR are changed. The y-directional current decreases while the pressure tensor Pyz increases/decreases when the agyrotropic beam density is low/high, where (x, y, z)-coordinates correspond the (L, M, N)-boundary coordinates. Because the reconnection electric field comes from −∂Pyz/∂z, our result implies that UHW plays an additional role in affecting larger-scale energy dissipation in the EDR by changing plasma parameters. We provide a simple diagram that shows how the UHW activities change the profiles of plasma parameters near the EDR comparing cases with and without UHW. ©2020. The Authors.
英文关键词	Electric fields; Magnetosphere; Particle interactions; Plasma devices; Plasma simulation; Wave plasma interactions; Beam density; Electron diffusion; Magnetospheric multi scale; Particle-in-cell simulations; Plasma parameter; Pressure tensors; Upper-hybrid waves; Wave-particle interactions; Energy dissipation; diffusion; electric field; electron; energy dissipation; simulation; wave energy
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169642
作者单位	Southwest Research Institute, San Antonio, TX, United States; Institute for Physical Science and Technology, University of Maryland, College Park, MD, United States; Swedish Institute of Space Physics, Uppsala, Sweden; State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Dokgo K.,Hwang K.-J.,Burch J.L.,et al. The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region[J],2020,47(19).
APA	Dokgo K.,Hwang K.-J.,Burch J.L.,Yoon P.H.,Graham D.B.,&Li W..(2020).The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region.Geophysical Research Letters,47(19).
MLA	Dokgo K.,et al."The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region".Geophysical Research Letters 47.19(2020).