Off-axis merging of leader channels in a high-voltage atmospheric discharge.
basic_science · Level V
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- Record sourced from PubMed, PMID 41999018.
- Also identified by DOI 10.1103/g9b8-f4jf.
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Abstract
A dual-wavelength high-sensitivity laser diagnostic based on a Nd:YAG laser (532 and 1064 nm, pulse duration of 7 ns) was applied to a laboratory high-voltage atmospheric discharge. The applied voltage was 1 MV, and the discharge current reached 10 kA. The discharge gap length was 0.55 m. The electrodes consisted of a pointed cathode inside a smooth-rim cone and a hemispherical mesh anode. The voltage pulse duration was about 1µs with a rise time of 150-200 ns. The closure regions of a cathode-directed leader and an anode-directed leader were visualized. Electron density profiles were obtained in both leader channels. Distinct differences in the plasma structure of the two leaders during off-axis merging were revealed.