Electron beam injection and associated LHR wave excitation - Computer experiments of electrodynamic tether system

Details Electron beam injection and associated LHR wave excitation - Computer experiments of electrodynamic tether system Electron beam injection and associated LHR wave excitation - Computer experiments of electrodynamic tether system

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..821u&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, May 1991, p. 821-824.

Physics

1

Beam Injection, Computerized Simulation, Electron Beams, Plasma Dynamics, Space Plasmas, Tethered Satellites, Electrodynamics, Electron Density (Concentration), Magnetohydrodynamic Flow, Plasma Drift, Spaceborne Experiments

Scientific paper

To study the nonlinear plasma dynamics associated with electrodynamic tether system, computer experiments were performed using a two-dimensional electromagnetic particle code. In the computer experiments, two conducting bodies, corresponding to the satellite and the orbiter, are placed in the x-y plane in a vehicle frame. The electrons collected by the tether system are emitted from the orbiter. At the satellite region, plasma depletion owing to the electron collection along B0 by the high potential satellite is found as well as a wake structure in the downsteam region of the plasma flow. At the orbiter region, an electron beam cloud is clearly created in the downstream region. The local electric field induced by the cloud modifies the beam pitch angle and accelerates some of the beam electrons along B0. Moreover, due to the cross-field current by the electron E x B drift motion around the cloud, LHR mode waves are enhanced locally. The local LHR wave excitation is quantitatively interpreted by the theory of the lower-hybrid-drift instability.

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