Ionization and recombination in nanosecond repetitively pulsed microplasmas in air at atmospheric pressure

We confine the nanosecond repetitively pulsed discharge to the micrometer scale, in a 200 µm discharge gap in air at atmospheric pressure and room temperature, focusing on measurements of the electron number density and electron temperature. The Stark broadening of H, O and N atomic lines and electr...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2018-10, Vol.51 (49), p.494002
Main Authors: Orrière, Thomas, Moreau, Eric, Pai, David Z
Format: Article
Language:English
Subjects:
electron cooling
ionization fraction
microplasma
Physics
Plasma Physics
pulsed breakdown
spark
three-body recombination
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Summary:We confine the nanosecond repetitively pulsed discharge to the micrometer scale, in a 200 µm discharge gap in air at atmospheric pressure and room temperature, focusing on measurements of the electron number density and electron temperature. The Stark broadening of H, O and N atomic lines and electrical conductivity both show that the electron number density reaches a maximum value of 1  ×  1019 cm−3. Boltzmann plots show the electron temperature to be 72 kK several nanoseconds after the end of the pulse of applied electric field. We will use these results to determine the mechanism responsible for electron loss during the early recombination phase (t  
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aae134