scholarly journals Magnetosphere convection electric field (MCEF) time variation from 1964 to 2009: Investigation on the signatures of the geoeffectiveness coronal mass ejections

2018 ◽  
Vol 13 (20) ◽  
pp. 273-281
Author(s):  
Salfo Kabore ◽  
Frederic Ouattara
Keyword(s):  
Electric Field ◽  
Coronal Mass Ejections ◽  
Time Variation ◽  
Convection Electric Field

scholarly journals Magnetospheric convection electric field dynamics andstormtime particle energization: case study of the magneticstorm of 4 May 1998

2004 ◽  
Vol 22 (2) ◽  
pp. 497-510 ◽  
Author(s):  
G. V. Khazanov ◽  
M. W. Liemohn ◽  
T. S. Newman ◽  
M.-C. Fok ◽  
A. J. Ridley
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Transport Model ◽  
Storm Event ◽  
Inner Magnetosphere ◽  
Narrow Channels ◽  
Near Earth Space ◽  
Magnetospheric Convection ◽  
Convection Electric Field ◽  
Seed Population

Abstract. It is shown that narrow channels of high electric field are an effective mechanism for injecting plasma into the inner magnetosphere. Analytical expressions for the electric field cannot produce these channels of intense plasma flow, and thus, result in less entry and adiabatic energization of the plasma sheet into near-Earth space. For the ions, omission of these channels leads to an underprediction of the strength of the stormtime ring current and therefore, an underestimation of the geoeffectiveness of the storm event. For the electrons, omission of these channels leads to the inability to create a seed population of 10-100 keV electrons deep in the inner magnetosphere. These electrons can eventually be accelerated into MeV radiation belt particles. To examine this, the 1-7 May 1998 magnetic storm is studied with a plasma transport model by using three different convection electric field models: Volland-Stern, Weimer, and AMIE. It is found that the AMIE model can produce particle fluxes that are several orders of magnitude higher in the L = 2 – 4 range of the inner magnetosphere, even for a similar total cross-tail potential difference. Key words. Space plasma physics (charged particle motion and acceleration) – Magnetospheric physics (electric fields, storms and substorms)

scholarly journals Energetic ion injection and formation of the storm-time symmetric ring current

2006 ◽  
Vol 24 (12) ◽  
pp. 3547-3556 ◽  
Author(s):  
L. Xie ◽  
Z. Y. Pu ◽  
X. Z. Zhou ◽  
S. Y. Fu ◽  
Q.-G. Zong ◽  
...  
Keyword(s):  
Electric Field ◽  
Ring Current ◽  
Particle Trajectory ◽  
Three Dimensional ◽  
Extensive Study ◽  
Current Injection ◽  
Ion Injection ◽  
Convection Electric Field ◽  
Trajectory Calculations ◽  
Current Region

Abstract. An extensive study of ring current injection and intensification of the storm-time ring current is conducted with three-dimensional (3-D) test particle trajectory calculations (TPTCs). The TPTCs reveal more accurately the process of ring current injection, with the main results being the following: (1) an intense convection electric field can effectively energize and inject plasma sheet particles into the ring current region within 1–3 h. (2) Injected ions often follow chaotic trajectories in non-adiabatic regions, which may have implications in storm and ring current physics. (3) The shielding electric field, which arises as a consequence of enhanced convection and co-exists with the injection and convection electric field, may cause the original open trajectories of injected ions with higher energy to change into closed ones, thus playing a role in the formation of the symmetric ring current.

Ring current ion flows and convection electric field as expected from observations by SAC-B/ISENA

1996 ◽  
Vol 23 (23) ◽  
pp. 3285-3288 ◽  
Author(s):  
A. Milillo ◽  
S. Orsini ◽  
I. A. Daglis ◽  
M. Candidi
Keyword(s):  
Electric Field ◽  
Ring Current ◽  
Convection Electric Field

Quiet-time convection electric field properties derived from keV electron measurements at the inner edge of the plasma sheet by means of GEOS-2

1982 ◽  
Vol 30 (3) ◽  
pp. 261-283 ◽  
Author(s):  
B. Hultqvist ◽  
H. Borg ◽  
L.-Ă. Holmgren ◽  
H. Reme ◽  
A. Bahnsen ◽  
...  
Keyword(s):  
Electric Field ◽  
Plasma Sheet ◽  
Quiet Time ◽  
Convection Electric Field
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