Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4929606
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Funding
- China Postdoctoral Science Foundation [2012M512041]
- Natural Science Foundation of Shannxi Province, China [2015JM1019]
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A diffuse direct-current glow discharge was realized with low energy consumption and high energy utilization efficiency at atmospheric pressure. The formation of diffuse discharge was demonstrated by examining and comparing the electrical properties and optical emissions of plasmas. In combination with theoretical derivation and calculation, we draw guidelines that appearance of nitrogen ions at low electron density is crucial to enhance the ambipolar diffusion for the expansion of discharge channel and the increasing ambipolar diffusion near the cathode plays a key role in the onset of diffuse discharge. An individual-discharge-channel expansion model is proposed to explain the diffuse discharge formation. (C) 2015 AIP Publishing LLC.
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