Back to Search
Start Over
The Effects of Upper-Hybrid Waves on Energy Dissipation in the Electron Diffusion Region
- Source :
- Geophysical Research Letters
- Publication Year :
- 2020
- Publisher :
- Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2020.
-
Abstract
- 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.<br />Key Points Upper‐hybrid waves locally contribute to the energy dissipation in the electron diffusion region via wave‐particle interactionPressure tensors, electric field, and current in the EDR can be changed as a result of upper‐hybrid wave activitiesChanges in the profiles of the plasma parameters can affect larger‐scale energy conversion in the EDR
- Subjects :
- Waves in Plasma
Electron Diffusion Region
Upper-Hybrid Waves
Electron
Radio Science
Fusion, plasma och rymdfysik
Wave/Particle Interactions
Kinetic Waves and Instabilities
Energy Dissipation
Research Letter
Magnetospheric Physics
Magnetic Reconnection
Ionosphere
Diffusion (business)
Plasma Waves and Instabilities
Physics
Solar Physics, Astrophysics, and Astronomy
Condensed matter physics
Upper‐Hybrid Waves
Plasma Energization
Magnetic reconnection
Dissipation
Fusion, Plasma and Space Physics
Research Letters
Geophysics
Physics::Space Physics
Space Plasma Physics
General Earth and Planetary Sciences
Space Sciences
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Geophysical Research Letters
- Accession number :
- edsair.doi.dedup.....ced3fc6addd7bde73236cd5208d222f6