Measurement of Temporally and Spatially Resolved Electron Density in the Filament of a Pulsed Spark Discharge in Water

NIU Zhiwen (牛志文); WEN Xiaoqiong (温小琼); REN Chunsheng (任春生); QIU Yuliang (邱玉良)

doi:10.1088/1009-0630/18/8/05

Plasma Science and Technology > 2016 > 18(8): 821-825. > DOI: 10.1088/1009-0630/18/8/05

NIU Zhiwen (牛志文), WEN Xiaoqiong (温小琼), REN Chunsheng (任春生), QIU Yuliang (邱玉良). Measurement of Temporally and Spatially Resolved Electron Density in the Filament of a Pulsed Spark Discharge in Water[J]. Plasma Science and Technology, 2016, 18(8): 821-825. DOI: 10.1088/1009-0630/18/8/05

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Measurement of Temporally and Spatially Resolved Electron Density in the Filament of a Pulsed Spark Discharge in Water

Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

Funds: supported in part by National Natural Science Foundation of China (Nos. 11275040 and 51437002)

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Received Date: July 30, 2015

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Abstract

Abstract

The temporally and spatially resolved optical emission spectrum of Hα of a pulsed spark discharge in water was experimentally measured. The temporally and spatially resolved electron densities, along the radial direction of the spark filament, for a pulsed spark discharge in water with a conductivity of 100 µS/cm were investigated. The electron density in the spark filament was found to be in the 10¹⁸/cm³ order of magnitude. The highest electron density was measured at the primary stage of the spark filament, and it decreased with time. The radial distribution of electron density increased from the center to the edge of the spark filament.
- underwater spark discharge,
- electron density,
- optical emission spectrum

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References

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