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Plasma potential. Often electrons move faster than ions and leave the plasma at a higher rate. The plasma becomes positive until the positive 'plasmas potential' slows down the rate of electron loss from the plasma until it is the same as the rate of positive ion loss. The electrons are partially held in the plasma by the attractive positive plasma ...


If the number of electrons and ions is exactly equal, it is still plasma. You are misunderstanding the quasineutrality requirement. The term "plasma" was coined by Irving Langmuir with the phrase "We shall use the name plasma to describe this region containing balanced charges of ions and electrons", Oscillations in Ionized Gases Proc. Nat. Acad. Sci. ...

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