Simulation Studies of the Interaction of a Neutral Gas and a Flowing Plasma
- Alan Johnstone
Published Online: 26 MAR 2013
Copyright 1991 by the American Geophysical Union.
Cometary Plasma Processes
How to Cite
Bingham, R., Bollens, R., Kazeminejad, F. and Dawson, J. M. (1991) Simulation Studies of the Interaction of a Neutral Gas and a Flowing Plasma, in Cometary Plasma Processes (ed A. Johnstone), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM061p0073
- Published Online: 26 MAR 2013
- Published Print: 1 JAN 1991
Print ISBN: 9780875900278
Online ISBN: 9781118663660
- Space plasmas;
The interaction of neutral gas and an ambient flowing plasma have been simulated using 2- and 3-D hybrid codes with kinetic ions and massless fluid electrons. The codes are generalized to include the production of plasma by a gradually ionizing gas in a flowing plasma, allowing important problems in space science, such as the pick up of plasma (comet gas) by the solar wind and artificially created comets produced by the AMPTE barium releases in the solar wind, to be studied. In the simulations of the AMPTE artificial comet, we have been able to demonstrate the generation of a diamagnetic cavity, which slows and deflects the solar wind protons, comet particle acceleration and the sideways deflection of the comet head and density ripples appearing on one side of the comet head which are explained in terms of the Rayleigh Taylor instability. The structure of the cavity as well as the magnetic field surronnding it is highly asymmetric.