scholarly journals Effects of Polarization Reversal on the Pitch Angle Scattering of Radiation Belt Electrons and Ring Current Protons by EMIC Waves

2020 ◽  
Vol 47 (17) ◽  
Author(s):  
Xing Cao ◽  
Binbin Ni ◽  
Danny Summers ◽  
Yuri Y. Shprits ◽  
Yuequn Lou
Keyword(s):  
Pitch Angle ◽  
Radiation Belt ◽  
Ring Current ◽  
Polarization Reversal ◽  
Angle Scattering ◽  
Radiation Belt Electrons ◽  
Emic Waves

scholarly journals Hot Plasma Effects on the Cyclotron-Resonant Pitch-Angle Scattering Rates of Radiation Belt Electrons Due to EMIC Waves

2018 ◽  
Vol 45 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Binbin Ni ◽  
Xing Cao ◽  
Yuri Y. Shprits ◽  
Danny Summers ◽  
Xudong Gu ◽  
...  
Keyword(s):  
Pitch Angle ◽  
Radiation Belt ◽  
Hot Plasma ◽  
Angle Scattering ◽  
Plasma Effects ◽  
Radiation Belt Electrons ◽  
Scattering Rates ◽  
Emic Waves

scholarly journals Hot Plasma Effects on the Pitch-angle Scattering Rates of Radiation Belt Electrons Due to Plasmaspheric Hiss

2020 ◽  
Vol 896 (2) ◽  
pp. 118
Author(s):  
Xing Cao ◽  
Binbin Ni ◽  
Danny Summers ◽  
Song Fu ◽  
Xudong Gu ◽  
...  
Keyword(s):  
Pitch Angle ◽  
Radiation Belt ◽  
Hot Plasma ◽  
Angle Scattering ◽  
Plasma Effects ◽  
Radiation Belt Electrons ◽  
Scattering Rates

scholarly journals Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves

2018 ◽  
Vol 45 (18) ◽  
pp. 9344-9352 ◽  
Author(s):  
C. C. Chaston ◽  
J. W. Bonnell ◽  
A. J. Halford ◽  
G. D. Reeves ◽  
D. N. Baker ◽  
...  
Keyword(s):  
Pitch Angle ◽  
Electromagnetic Waves ◽  
Radiation Belt ◽  
Angle Scattering ◽  
Radiation Belt Electrons

Effects of energy and pitch angle mixed diffusion on radiation belt electrons

2011 ◽  
Vol 73 (7-8) ◽  
pp. 785-795 ◽  
Author(s):  
Qiuhua Zheng ◽  
Mei-Ching Fok ◽  
Jay Albert ◽  
Richard B. Horne ◽  
Nigel P. Meredith
Keyword(s):  
Pitch Angle ◽  
Radiation Belt ◽  
Radiation Belt Electrons

scholarly journals Multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an intense solar wind dynamic pressure pulse

2016 ◽  
Vol 34 (5) ◽  
pp. 493-509 ◽  
Author(s):  
Zheng Xiang ◽  
Binbin Ni ◽  
Chen Zhou ◽  
Zhengyang Zou ◽  
Xudong Gu ◽  
...  
Keyword(s):  
Solar Wind ◽  
Radiation Belt ◽  
Pressure Pulse ◽  
Electron Flux ◽  
Dynamic Pressure ◽  
Energetic Electron ◽  
Solar Wind Dynamic Pressure ◽  
Angle Scattering ◽  
Radiation Belt Electrons ◽  
Atmospheric Loss

<p><strong>Abstract.</strong> Radiation belt electron flux dropouts are a kind of drastic variation in the Earth's magnetosphere, understanding of which is of both scientific and societal importance. Using electron flux data from a group of 14 satellites, we report multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an event of intense solar wind dynamic pressure pulse. When the pulse occurred, magnetopause and atmospheric loss could take effect concurrently contributing to the electron flux dropout. Losses through the magnetopause were observed to be efficient and significant at <i>L</i> ≳ 5, owing to the magnetopause intrusion into <i>L</i> ∼ 6 and outward radial diffusion associated with sharp negative gradient in electron phase space density. Losses to the atmosphere were directly identified from the precipitating electron flux observations, for which pitch angle scattering by plasma waves could be mainly responsible. While the convection and substorm injections strongly enhanced the energetic electron fluxes up to hundreds of keV, they could delay other than avoid the occurrence of electron flux dropout at these energies. It is demonstrated that the pulse-time radiation belt electron flux dropout depends strongly on the specific interplanetary and magnetospheric conditions and that losses through the magnetopause and to the atmosphere and enhancements of substorm injection play an essential role in combination, which should be incorporated as a whole into future simulations for comprehending the nature of radiation belt electron flux dropouts.</p>

scholarly journals Simultaneous Observations of Electromagnetic Ion Cyclotron (EMIC) Waves and Pitch Angle Scattering During a Van Allen Probes Conjunction

2020 ◽  
Vol 125 (4) ◽  
Author(s):  
K. Sigsbee ◽  
C. A. Kletzing ◽  
J. B. Faden ◽  
A. N. Jaynes ◽  
G. D. Reeves ◽  
...  
Keyword(s):  
Pitch Angle ◽  
Angle Scattering ◽  
Van Allen Probes ◽  
Ion Cyclotron ◽  
Emic Waves

scholarly journals Magnetospheric Response to Solar Wind Forcing: ULF Wave – Particle Interaction Perspective

2021 ◽  
Author(s):  
Qiugang Zong
Keyword(s):  
Solar Wind ◽  
Radiation Belt ◽  
Ring Current ◽  
Dynamic Pressure ◽  
Plasma Heating ◽  
Interplanetary Shock ◽  
Wind Forcing ◽  
Ulf Waves ◽  
Radiation Belt Electrons ◽  
The Impact

Abstract. Solar wind forcing, e.g. interplanetary shock and/or solar wind dynamic pressure pulses impact on the Earth’s magnetosphere manifests many fundamental important space physics phenomena including producing electromagnetic waves, plasma heating and energetic particle acceleration. This paper summarizes our present understanding of the magnetospheric response to solar wind forcing in the aspects of radiation belt electrons, ring current ions and plasmaspheric plasma physics based on in situ spacecraft measurements, ground-based magnetometer data, MHD and kinetic simulations. Magnetosphere response to solar wind forcing, is not just a “one-kick” scenario. It is found that after the impact of solar wind forcing on the Earth’s magnetosphere, plasma heating and energetic particle acceleration started nearly immediately and could last for a few hours. Even a small dynamic pressure change of interplanetary shock or solar wind pressure pulse can play a non-negligible role in magnetospheric physics. The impact leads to generate series kind of waves including poloidal mode ultra-low frequency (ULF) waves. The fast acceleration of energetic electrons in the radiation belt and energetic ions in the ring current region response to the impact usually contains two contributing steps: (1) the initial adiabatic acceleration due to the magnetospheric compression; (2) followed by the wave-particle resonant acceleration dominated by global or localized poloidal ULF waves excited at various L-shells. Generalized theory of drift and drift-bounce resonance with growth or decay localized ULF waves has been developed to explain in situ spacecraft observations. The wave related observational features like distorted energy spectrum, boomerang and fishbone pitch angle distributions of radiation belt electrons, ring current ions and plasmaspheric plasma can be explained in the frame work of this generalized theory. It is worthy to point out here that poloidal ULF waves are much more efficient to accelerate and modulate electrons (fundamental mode) in the radiation belt and charged ions (second harmonic) in the ring current region. The results presented in this paper can be widely used in solar wind interacting with other planets such as Mercury, Jupiter, Saturn, Uranus and Neptune, and other astrophysical objects with magnetic fields.

scholarly journals Simultaneous observations of precipitating radiation belt electrons and ring current ions associated with the plasmaspheric plume

2013 ◽  
Vol 118 (7) ◽  
pp. 4391-4399 ◽  
Author(s):  
Zhigang Yuan ◽  
Ming Li ◽  
Ying Xiong ◽  
Haimeng Li ◽  
Meng Zhou ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Ring Current ◽  
Radiation Belt Electrons
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