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Fast magnetosonic waves driven by shell velocity distributions 

Min, Kyungguk; Liu, Kaijun; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-05)
Using linear dispersion theory and particle-in-cell simulations, we explore the ion Bernstein instability driven by the shell-type ion velocity distribution which is related to the excitation of fast magnetosonic waves in ...

Fast Magnetosonic Waves Observed by Van Allen Probes: Testing Local Wave Excitation Mechanism 

Min, Kyungguk; Liu, Kaijun; Wang, Xueyi; Chen, Lunjin; Denton, Richard E.; 0000-0001-5882-1328; 0000-0001-5533-5981 (2020-05-28)
Linear Vlasov theory and particle-in-cell (PIC) simulations for electromagnetic fluctuations in a homogeneous, magnetized, and collisionless plasma are used to investigate a fast magnetosonic wave event observed by the Van ...

Field line distribution of mass density at geostationary orbit 

Denton, R. E.; Takahashi, Kazue; Lee, Jimyoung; Zeitler, C. K.; Wimer, N. T.; Litscher, L. E.; Singer, H. J.; Min, Kyungguk; 0000-0002-2095-8529 (2020-06-05)
The distribution of mass density along the field lines affects the ratios of toroidal (azimuthally oscillating) Alfven frequencies, and given the ratios of these frequencies, we can get information about that distribution. ...

Foreshock wave interaction with the magnetopause: Signatures of mode conversion 

Shi, Feng; Cheng, Lei; Lin, Yu; Wang, Xueyi; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-01)
Our previous hybrid simulation (Shi et al., 2013) under a radial interplanetary magnetic field (IMF) and a supercritical solar wind Mach number has shown that foreshock compressional waves originated from the quasi-parallel ...

Free-Boundary Axisymmetric MHD Equilibrium 

Guazzotto, Luca (2018-07-09)
The calculation of equilibrium conditions is a common task in the study and modeling of magnetic-confinement experiments for con- trolled nuclear fusion, in which a high-temperature plasma is confined in a finite region ...

Generation of anomalous flows near the bow shock by its interaction with interplanetary discontinuities 

Lin, Yu; 0000-0001-8003-9252 (2020-06-30)
Two-dimensional hybrid simulations using a curvilinear coordinate system are carried out to study the interaction of the Earth's bow shock (BS) with an interplanetary directional discontinuity. In particular, plasma flow ...

Generation of near-Earth reconnection by divergent flows in the plasma sheet 

Lin, Y.; Swift, DW; 0000-0001-8003-9252 (2020-06-25)
A global two-dimensional hybrid simulation is carried out to study the evolution of the near-Earth plasma sheet. It is shown that reconnection X lines and plasmoids can be generated by diverging flows in the plasma sheet. ...

Generation of rising-tone chorus in a two-dimensional mirror field by using the general curvilinear PIC code 

Ke, Yangguang; Gao, Xinliang; Lu, Quanming; Wang, Xueyi; Wang, Shui; 0000-0001-5533-5981 (2020-05-29)
Recently, the generation of rising-tone chorus has been implemented with one-dimensional (1-D) particle-in-cell (PIC) simulations in an inhomogeneous background magnetic field, where both the propagation of waves and motion ...

Global hybrid simulation of mode conversion at the dayside magnetopause 

Shi, Feng; Lin, Yu; Wang, Xueyi; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-05)
Mode conversion at the magnetopause has been suggested to lead to the generation of kinetic Alfven waves (KAWs) and effective mass transport from the solar wind into the magnetosphere. To investigate the mode conversion ...

Global hybrid simulation of the dayside reconnection layer and associated field-aligned currents 

Lin, Y.; 0000-0001-8003-9252 (2020-06-26)
A two-dimensional global hybrid simulation is carried out to study the structure of the magnetopause boundary layer in the noon-midnight meridian plane associated with the dayside reconnection. In the simulation the bow ...

Global images of trapped ring current ions during main phase of 17 March 2015 geomagnetic storm as observed by TWINS 

Perez, J. D.; Goldstein, J.; McComas, D. J.; Valek, P.; Fok, M-C; Hwang, Kyoung-Joo (2020-06-03)
A unique view of the trapped particles in the inner magnetosphere provided by energetic neutral atom (ENA) imaging is used to observe the dynamics of the spatial structure and the pitch angle anisotropy on a global scale ...

Global observations of ring current dynamics during corotating interaction region-driven geomagnetic storms in 2008 

Grimes, E. W.; Perez, J. D.; Goldstein, J.; McComas, D. J.; Valek, P. (2020-06-12)
We examine the evolution of the ring current during the main and early recovery phases of three geomagnetic storms driven by corotating interaction regions. The equatorial energy density profiles of 5-30 keV ions are ...

Global patterns of Joule heating in the high-latitude ionosphere 

Zhang, XX; Wang, C.; Chen, T.; Wang, YL; Tan, A; Wu, TS; Germany, GA; Wang, W (2020-06-18)
[1] A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ...

Global-scale hybrid simulation of cusp precipitating ions associated with magnetopause reconnection under southward IMF 

Tan, B.; Lin, Y.; Perez, J. D.; Wang, X. Y.; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-09)
With a 3-D global-scale hybrid simulation model, we investigate the energy spectra of cusp precipitating ions and issues associated with magnetopause reconnection under a southward IMF. Both the spatial and temporal energy ...

Global-scale hybrid simulation of dayside magnetic reconnection under southward IMF: Structure and evolution of reconnection 

Tan, B.; Lin, Y.; Perez, J. D.; Wang, X. Y.; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-12)
Magnetopause reconnection is investigated with our 3-D self-consistent global hybrid simulation model. The magnetic configuration and evolution of Flux Transfer Events (FTEs) and the associated ion density and ion velocity ...

Global-scale simulation of foreshock structures at the quasi-parallel bow shock 

Lin, Yu; 0000-0001-8003-9252 (2020-06-18)
A two-dimensional, global-scale hybrid simulation is carried out to study the kinetic structure of the quasi-parallel bow shock. In the simulation the bow shock forms by the interaction of the supersonic solar wind and the ...

Hall effect control of magnetotail dawn-dusk asymmetry: A three-dimensional global hybrid simulation 

Lu, San; Lin, Y.; Angelopoulos, V.; Artemyev, A. V.; Pritchett, P. L.; Lu, Quanming; Wang, Xueyi; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-03)
Magnetotail reconnection and related phenomena (e.g., flux ropes, dipolarizing flux bundles, flow bursts, and particle injections) occur more frequently on the duskside than on the dawnside. Because this asymmetry can ...

The Hall Electric Field in Earth's Magnetotail Thin Current Sheet 

Lu, San; Artemyev, A., V; Angelopoulos, V; Lin, Y; Zhang, X-J; Liu, J.; Avanov, L.A.; Giles, B. L.; Russell, C. T.; Strangeway, R. J. (2020-05-28)
One of the most important properties of Earth's magnetotail thin current sheet (TCS) is that its current is predominantly contributed by magnetized electrons. The Hall electric field, normal to the TCS and generated by ...

Hybrid simulation of foreshock waves and ion spectra and their linkage to cusp energetic ions 

Wang, X. Y.; Lin, Y.; Chang, S. -W.; 0000-0001-5533-5981; 0000-0001-8003-9252 (2020-06-16)
A three-dimensional global hybrid simulation is carried out to investigate energetic ions and electromagnetic waves in the quasi-parallel (Q-parallel to) bow shock and cusp for a typical interplanetary magnetic field ...

Hybrid simulation of mode conversion at the magnetopause 

Lin, Y.; Johnson, J. R.; Wang, X. Y.; 0000-0001-8003-9252; 0000-0001-5533-5981 (2020-06-16)
Two-dimensional hybrid simulations are used to investigate how fast-mode compressional waves incident on a magnetopause current layer mode convert both linearly and nonlinearly to short wavelength (k(perpendicular to)rho(i) ...