期刊
PLASMA SOURCES SCIENCE & TECHNOLOGY
卷 22, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0963-0252/22/2/025018
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- Texas State University-San Marcos
Plasmoids generated by discharging a high-voltage capacitor through electrodes submerged in a weak aqueous electrolyte have attracted attention because of their resemblance to the natural phenomenon of ball lightning. We describe an extensive series of experimental studies which elucidate the mechanism responsible for the production of water plasmoids. We show that a plasma jet from a cathode spot is responsible for the formation of the main plasmoid, which grows in accordance with a current surge due to increasing contact area of the plasma with the liquid-air surface of the electrolyte. Spectra of optical emissions and scanning electron microscope studies indicate that the plasmoids glow because of a combination of chemiluminescence, atomic and molecular excitation, and possible incandescence from small particulates.
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