Energetic electron distributions fitted with a relativistic kappa-type function at geosynchronous orbit

2008 ◽  
Vol 113 (A5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Fuliang Xiao ◽  
Chenglong Shen ◽  
Yuming Wang ◽  
Huinan Zheng ◽  
Shui Wang
Keyword(s):  
Energetic Electron ◽  
Geosynchronous Orbit ◽  
Type Function ◽  
Electron Distributions

scholarly journals Magnetic dipolarizations inside geosynchronous orbit with tailward ion flows

2019 ◽  
Vol 37 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Xiaoying Sun ◽  
Weining William Liu ◽  
Suping Duan
Keyword(s):  
Plasma Sheet ◽  
Sharp Increase ◽  
Energetic Electron ◽  
Elevation Angle ◽  
Time History ◽  
Geosynchronous Orbit ◽  
Inner Magnetosphere ◽  
Transfer Path ◽  
New Energy ◽  
History Of

Abstract. Electromagnetic field and plasma data from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) near-Earth probes are used to investigate magnetic dipolarizations inside geosynchronous orbit on 27 August 2014 during an intense substorm with AEmax∼1000 nT. THEMIS-D (TH-D) was located inside geosynchronous orbit around midnight in the interval from 09:25 to 09:55 UT. During this period, two distinct magnetic dipolarizations with tailward ion flows are observed by TH-D. The first one is indicated by the magnetic elevation angle increase from 15 to 25∘ around 09:30:40 UT. The tailward perpendicular velocity is V⊥x∼-50 km s−1. The second one is presented by the elevation angle increase from 25 to 45∘ around 09:36 UT, and the tailward perpendicular velocity is V⊥x∼-70 km s−1. These two significant dipolarizations are accompanied with the sharp increase in the energy flux of energetic electron inside geosynchronous orbit. After a 5 min expansion of the near-Earth plasma sheet (NEPS), THEMIS-E (TH-E) located outside geosynchronous orbit also detected this tailward expanding plasma sheet with ion flows of −150 km s−1. The dipolarization propagates tailward with a speed of −47 km s−1 along a 2.2 RE distance in the X direction between TH-D and TH-E within 5 min. These dipolarizations with tailward ion flows observed inside geosynchronous orbit indicate a new energy transfer path in the inner magnetosphere during substorms.

scholarly journals Attenuation of Plasmaspheric Hiss Associated with the Enhanced Magnetospheric Electric Field

2021 ◽  
Author(s):  
Haimeng Li ◽  
Wen Li ◽  
Qianli Ma ◽  
Yukitoshi Nishimura ◽  
Zhigang Yuan ◽  
...  
Keyword(s):  
Solar Wind ◽  
Electric Field ◽  
Energetic Electron ◽  
Wave Intensity ◽  
Wave Amplification ◽  
Model Driven ◽  
Van Allen Probes ◽  
Electron Distributions ◽  
New Finding ◽  
Substorm Activity

Abstract. We report an attenuation of hiss wave intensity in the duskside of outer plasmasphere in response to enhanced convection and substorm based on Van Allen Probes observations. Using test particle codes, we simulate the dynamics of energetic electron fluxes based on a realistic magnetospheric electric field model driven by solar wind and subauroral polarization stream. We suggest that the enhanced magnetospheric electric field causes the outward and sunward motion of energetic electrons, corresponding to the decrease of energetic electron fluxes on the duskside, leading to the subsequent attenuation of hiss wave intensity. The results indicate that the enhanced electric field can significantly change the energetic electron distributions, which provide free energy for hiss wave amplification. This new finding is critical for understanding the generation of plasmaspheric hiss and its response to solar wind and substorm activity.

Drifting holes in the energetic electron flux at geosynchronous orbit following substorm onset

1992 ◽  
Vol 97 (A5) ◽  
pp. 6541 ◽  
Author(s):  
V. A. Sergeev ◽  
T. Bösinger ◽  
R. D. Belian ◽  
G. D. Reeves ◽  
T. E. Cayton
Keyword(s):  
Electron Flux ◽  
Energetic Electron ◽  
Substorm Onset ◽  
Geosynchronous Orbit

scholarly journals Attenuation of plasmaspheric hiss associated with the enhanced magnetospheric electric field

2021 ◽  
Vol 39 (3) ◽  
pp. 461-470
Author(s):  
Haimeng Li ◽  
Wen Li ◽  
Qianli Ma ◽  
Yukitoshi Nishimura ◽  
Zhigang Yuan ◽  
...  
Keyword(s):  
Solar Wind ◽  
Electric Field ◽  
Field Model ◽  
Energetic Electron ◽  
Wave Intensity ◽  
Wave Amplification ◽  
Model Driven ◽  
Electron Distributions ◽  
New Finding ◽  
Substorm Activity

Abstract. We report an attenuation of hiss wave intensity in the duskside of the outer plasmasphere in response to enhanced convection and a substorm based on Van Allen Probe observations. Using test particle codes, we simulate the dynamics of energetic electron fluxes based on a realistic magnetospheric electric field model driven by solar wind and subauroral polarization stream. We suggest that the enhanced magnetospheric electric field causes the outward and sunward motion of energetic electrons, corresponding to the decrease of energetic electron fluxes on the duskside, leading to the subsequent attenuation of hiss wave intensity. The results indicate that the enhanced electric field can significantly change the energetic electron distributions, which provide free energy for hiss wave amplification. This new finding is critical for understanding the generation of plasmaspheric hiss and its response to solar wind and substorm activity.

Energetic electron components at geosynchronous orbit

1989 ◽  
Vol 16 (2) ◽  
pp. 147-150 ◽  
Author(s):  
T. E. Cayton ◽  
R. D. Belian ◽  
S. P. Gary ◽  
T. A. Fritz ◽  
D. N. Baker
Keyword(s):  
Energetic Electron ◽  
Geosynchronous Orbit

scholarly journals Magnetic dipolarizations inside geosynchronous orbit with tailward ions flow

2018 ◽  
Author(s):  
Xiaoying Sun ◽  
Weining William Liu ◽  
Suping Duan
Keyword(s):  
Plasma Sheet ◽  
Energetic Electron ◽  
Elevation Angle ◽  
Time History ◽  
Geosynchronous Orbit ◽  
Inner Magnetosphere ◽  
Ion Flow ◽  
Transfer Path ◽  
New Energy ◽  
History Of

Abstract. Electromagnetic field and plasma data from the Time History of Events and Macroscale Interactions duringSubstorms (THEMIS) near-Earth probes are used to investigate magnetic dipolarizations inside geosynchronous orbit on 27 August 2014 during an intense substorm with AEmax ~ 1000 nT. THEMIS-D (TH-D) was located inside geosynchronous orbit around midnight in the interval from 09:25 UT to 09:55 UT. During this period two distinct magnetic dipolarizations with tailward ions flow are observed by TH-D. The first one is displayed by magnetic elevation angle increase from 15 degree to 25 degree around 09:30:40 UT. The tailward perpendicular velocity is V⟂x ~ −50 km/s. The second one is presented by the elevation angle increase from 25 degree to 45 degree around 09:36 UT. And the tailward perpendicular velocity is V⟂x ~ −70 km/s. These two significant dipolarizations are accompanied with the sharp increase in the energy flux of energetic electron inside geosynchronous. After 5 min expanding of near-Earth plasma sheet (NEPS), THEMIS-E (TH-E) located outside geosynchronous orbit also detects this tailward expanding plasma sheet with ion flow −150 km/s. The dipolarization propagates tailward with speed −47 km/s, along 2.2 RE distance in the X direction between TH-D and TH-E within 5 min. These dipolarizations with tailward ions flow observed inside geosynchronous orbit indicate new energy transfer path in the inner magnetosphere during substorms.

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