Experimental Study of a Long-Living Plasmoid Using High-Speed Filming.

0483127 - ÚFP 2018 RIV US eng J - Journal Article
Stelmashuk, Vitaliy - Hoffer, Petr
Experimental Study of a Long-Living Plasmoid Using High-Speed Filming.
IEEE Transactions on Plasma Science. Roč. 45, č. 12 (2017), s. 3160-3165. ISSN 0093-3813. E-ISSN 1939-9375
Institutional support: RVO:61389021
Keywords : Plasmoid * discharge in contact with water * atmospheric-pressure plasmas
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.253, year: 2017

This paper describes the time evolution of ball plasmoids generated by millisecond atmospheric discharge in contact with water. The aim of this paper was to clarify an initiation and a formation mechanism of an atmospheric ball plasmoid. The use of a higher frame rate of filming and shorter exposition time, in comparison with past experiments, allows us to observe the fast processes that occur during a plasmoid evolution. We assert that an initial electrical breakdown in a cathode ceramic tube filled by a conductive liquid is essential for further plasmoid formation. It generates a shock wave resulting in a blast of conductive liquid. The resulting expansion of water vapor and bubbles with an addition of weekly ionized plasma serves as a main source of matter for plasmoid formation. We also note that an electrical arc generated after the breakdown transforms to a plasma jet. This jet accelerates plasma to the plasmoid
Permanent Link: http://hdl.handle.net/11104/0278533