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Schematic of the CDBD experimental apparatus and associated diagnostics. An equivalent circuit diagram of the CDBD portion of the circuit is shown in the inset.
Temporally resolved current and PMT emission profiles showing the streamer-glow transition for the CDBD at a gap separation of 20 mm.
Current scaling in this CDBD configuration as a function of gap separation for a 95% He/5% Ar mixture and for a pure He case using the bare cathode. 750 nm PMT emission from Ar is also shown normalized to the nominal He/Ar bare cathode current.
calculations showing the ratio of ionization frequencies of a 95% He/5% Ar mixture to the pure He case (left) and the ionization frequency in the He/Ar mixture (right) for several mole fractions of air.
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