The backstreaming of electrons from planetary and interplanetary shocks creates foreshocks of fast particles propagating along the magnetic field. The effect of low frequency magnetic fluctuations is to create both a broadening and a fine structure of the foreshock upstream boundary. This is studied by means of a newly developed 3-D numerical simulation of turbulent magnetic fields. Applications to the Earth and to the termination shock electron foreshocks are done, and some implications on the observations of the spreading and of the bursty structure of the foreshocks are discussed.
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© 1996 American Institute of Physics.
1996
American Institute of Physics
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