On the occurrence of ‘bead lightning’ phenomena in long laboratory sparks
2016 (English)In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 380, no 7-8, 816-821 p.Article in journal (Refereed) Published
The formation of bead lightning, where the lightning channel appears to break up into luminous fragments, is still an object of speculation. Here we report similar observations in laboratory discharges. Analysis of time resolved photographs shows that the discharge channel exhibits a 'bead pattern' in the decaying stage of the discharge and the occurrence of loops in the channel sections where the bead pattern is observed. This result presents the first evidence that the rapid cooling of non-uniform channel sections could lead to the formation of beads. It is suggested that periodically occurring non-uniform channel sections could explain the bead pattern of lightning discharges.
Place, publisher, year, edition, pages
2016. Vol. 380, no 7-8, 816-821 p.
Meteorology and Atmospheric Sciences Engineering and Technology
Research subject Engineering Science with specialization in Atmospheric Discharges
IdentifiersURN: urn:nbn:se:uu:diva-275223DOI: 10.1016/j.physleta.2015.12.039ISI: 000370106900002OAI: oai:DiVA.org:uu-275223DiVA: diva2:899328
FunderSwedish Research Council, 621-2012-3300