Interaction of high-energy particles with magnetohydrodynamic modes in the Earth's magnetosphere

2002 ◽  
Vol 8 (5-6) ◽  
pp. 91-95
Author(s):  
O.K. Cheremnykh ◽  
◽  
D.P. Demkiv ◽  
Keyword(s):  
High Energy ◽  
Earth’S Magnetosphere ◽  
Earth's Magnetosphere ◽  
High Energy Particles

scholarly journals Electron dynamics during substorm dipolarization in Mercury's magnetosphere

2005 ◽  
Vol 23 (10) ◽  
pp. 3389-3398 ◽  
Author(s):  
D. C. Delcourt ◽  
K. Seki ◽  
N. Terada ◽  
Y. Miyoshi
Keyword(s):  
Magnetic Field ◽  
High Energy ◽  
Expansion Phase ◽  
Earth’S Magnetosphere ◽  
High Energy Electrons ◽  
Earth's Magnetosphere ◽  
Magnetic Field Model ◽  
Particle Simulations ◽  
Field Lines ◽  
The Magnetic Field

Abstract. We examine the nonlinear dynamics of electrons during the expansion phase of substorms at Mercury using test particle simulations. A simple model of magnetic field line dipolarization is designed by rescaling a magnetic field model of the Earth's magnetosphere. The results of the simulations demonstrate that electrons may be subjected to significant energization on the time scale (several seconds) of the magnetic field reconfiguration. In a similar manner to ions in the near-Earth's magnetosphere, it is shown that low-energy (up to several tens of eV) electrons may not conserve the second adiabatic invariant during dipolarization, which leads to clusters of bouncing particles in the innermost magnetotail. On the other hand, it is found that, because of the stretching of the magnetic field lines, high-energy electrons (several keVs and above) do not behave adiabatically and possibly experience meandering (Speiser-type) motion around the midplane. We show that dipolarization of the magnetic field lines may be responsible for significant, though transient, (a few seconds) precipitation of energetic (several keVs) electrons onto the planet's surface. Prominent injections of energetic trapped electrons toward the planet are also obtained as a result of dipolarization. These injections, however, do not exhibit short-lived temporal modulations, as observed by Mariner-10, which thus appear to follow from a different mechanism than a simple convection surge.

Satellite experiment ARINA for studying seismic effects in the high-energy particle fluxes in the Earth’s magnetosphere

2007 ◽  
Vol 45 (5) ◽  
pp. 445-448 ◽  
Author(s):  
A. V. Bakaldin ◽  
A. G. Batishchev ◽  
S. A. Voronov ◽  
A. M. Galper ◽  
L. A. Grishantseva ◽  
...  
Keyword(s):  
High Energy ◽  
High Energy Particle ◽  
Energy Particle ◽  
Seismic Effects ◽  
Earth’S Magnetosphere ◽  
Earth's Magnetosphere ◽  
Satellite Experiment ◽  
Particle Fluxes
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