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Collisionless electrons in a thin high Mach number shock: dependence on angle and b

By M. Gedalin and E. Griv


Abstract. It is widely believed that electron dynamics in the shock front is essentially collisionless and determined by the quasistationary magnetic and electric ®elds in the shock. In thick shocks the electron motion is adiabatic: the magnetic moment is conserved throughout the shock and v2? / B. In very thin shocks with large cross-shock potential (the last feature is typical for shocks with strong electron heating), electrons may become demagnetized (the magnetic moment is no longer conserved) and their motion may become nonadiabatic. We consider the case of substantial demagnetization in the shock pro®le with the small-scale internal structure. The dependence of electron dynamics and downstream distributions on the angle between th

Year: 2013
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