Diocotron Instabilities in an Electron Column Induced by a Small Fraction of Transient Positive Ions


It is well known that a small fraction of positive ions can destabilize diocotron modes on electron plasmas. However, the historical (and recent) interpretation of experimental results in terms of 2D (or modified 2D) theories of ion-induced instabilities is apparently erroneous. Here, we experimentally characterize a strong exponential instability with no… (More)


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