Abstract
In the experiment, a cold electron flow is produced across the multidipole field of a magnetic fence. For electron flow velocities above the ion-acoustic speed ( nu d>Cs), generation of ion-acoustic instability is observed beyond the magnetic sheath region of the fence. The anomalous resistivity associated with the turbulence is large enough to give rise to a plasma potential jump over a long distance (L>> lambda D), known as a double-layer. The anomalous particle transport process leading to the formation of the small-amplitude double-layer is related to a bootstrap mechanism.
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