Journal
PLASMA SCIENCE & TECHNOLOGY
Volume 18, Issue 8, Pages 821-825Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1009-0630/18/8/05
Keywords
underwater spark discharge; electron density; optical emission spectrum
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Funding
- National Natural Science Foundation of China [11275040, 51437002]
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The temporally and spatially resolved optical emission spectrum of Ha 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 S/cm were investigated. The electron density in the spark filament was found to be in the 1018/cm(3) 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.
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