Investigations of the magnetospheric plasma distribution in the vicinity of a pulsar—DYMPHNA3D

2008 ◽  
Author(s):  
John Mc Donald ◽  
Andrew Shearer ◽  
C. Bassa ◽  
Z. Wang ◽  
A. Cumming ◽  
...  
Keyword(s):  
Magnetospheric Plasma ◽  
Plasma Distribution

scholarly journals Multi-component ground-based observation of ULF waves: goals and methods

1998 ◽  
Vol 41 (1) ◽  
Author(s):  
V. A. Pilipenko ◽  
M. Vellante ◽  
S. Anisimov ◽  
M. De Lauretis ◽  
E. N. Fedorov ◽  
...  
Keyword(s):  
Magnetospheric Plasma ◽  
Resonance Structure ◽  
Ulf Waves ◽  
Plasma Distribution ◽  
Experimental Apparatus ◽  
Geoelectrical Structures ◽  
Magnetic Observatories ◽  
Hydromagnetic Diagnostics

A revival of the combined magnetic and telluric electric measurements at magnetic observatories is suggested.A number of problems, where such observations might be very helpful, are outlined: 1) the account for the resonance structure of the ULF field during the magnetotelluric probing of low-conductive geoelectrical structures; 2) the hydromagnetic diagnostics of the magnetospheric plasma distribution; 3) the discrimination of ionospheric and seismic contributions in anomalous ULF signals possibly related with earthquakes. The experimental apparatus for telluric current measurements, which has recently been installed at the observatories of Borok (Russia) and L'Aquila (Italy), is described.

Geophysics: Magnetospheric plasma composition and the solar cycle

Nature ◽  
1983 ◽  
Vol 303 (5919) ◽  
pp. 661-662
Author(s):  
Stanley W.H. Cowley
Keyword(s):  
Solar Cycle ◽  
Magnetospheric Plasma ◽  
Plasma Composition

scholarly journals Three-dimensional multispecies hybrid simulation of Titan's highly variable plasma environment

2007 ◽  
Vol 25 (1) ◽  
pp. 117-144 ◽  
Author(s):  
S. Simon ◽  
A. Boesswetter ◽  
T. Bagdonat ◽  
U. Motschmann ◽  
J. Schuele
Keyword(s):  
Plasma Flow ◽  
Flow Direction ◽  
Three Dimensional ◽  
Hybrid Simulation ◽  
Slight Modification ◽  
Magnetospheric Plasma ◽  
Particle Model ◽  
Tail Region ◽  
Simulation Code ◽  
Ion Species

Abstract. The interaction between Titan's ionosphere and the Saturnian magnetospheric plasma flow has been studied by means of a three-dimensional (3-D) hybrid simulation code. In the hybrid model, the electrons form a mass-less, charge-neutralizing fluid, whereas a completely kinetic approach is retained to describe ion dynamics. The model includes up to three ionospheric and two magnetospheric ion species. The interaction gives rise to a pronounced magnetic draping pattern and an ionospheric tail that is highly asymmetric with respect to the direction of the convective electric field. Due to the dependence of the ion gyroradii on the ion mass, ions of different masses become spatially dispersed in the tail region. Therefore, Titan's ionospheric tail may be considered a mass-spectrometer, allowing to distinguish between ion species of different masses. The kinetic nature of this effect is emphasized by comparing the simulation with the results obtained from a simple analytical test-particle model of the pick-up process. Besides, the results clearly illustrate the necessity of taking into account the multi-species nature of the magnetospheric plasma flow in the vicinity of Titan. On the one hand, heavy magnetospheric particles, such as atomic Nitrogen or Oxygen, experience only a slight modification of their flow pattern. On the other hand, light ionospheric ions, e.g. atomic Hydrogen, are clearly deflected around the obstacle, yielding a widening of the magnetic draping pattern perpendicular to the flow direction. The simulation results clearly indicate that the nature of this interaction process, especially the formation of sharply pronounced plasma boundaries in the vicinity of Titan, is extremely sensitive to both the temperature of the magnetospheric ions and the orientation of Titan's dayside ionosphere with respect to the corotating magnetospheric plasma flow.

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