Turn-on Mechanism of a Microplasma

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Abstract
A turn-on mechanism of a microplasma is investigated. Microplasma phenomena are treated as a two-valued Markoff process. The turn-on delay of a microplasma is given as a Laue plot and is found to be similar to a statistical time lag in a gas discharge. The Laue plot at room temperature shows that the turn-on phenomena are governed by a thermal generation rate of carriers, G o (T). On the other hand, most of microplasma turn-on at liquid nitrogen temperature show that they are affected by a transient carrier generation from trapping centers because G o (T) is negligibly small. The concerned energy depth of the trapping center is estimated to be shallower than 0.15 eV from the aftereffect of preceding conducting state. Turn-on behavior of a microplasma for the gradually increasing voltage is also analyzed.

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