Abstract
AbstractA simple reactor system, which involved a pulsed discharge occurring on the surface of an electrolyte in the atmosphere, was installed to generate ball lightning (BL), and BL with a lifetime of 0.5 s and a size of 250 mm maximum was observed. Meanwhile, a single current pulse with the peak value up to 90 A and full width at half maximum (FWHM) of 5–62 ms appears immediately after the system was triggered. It is concluded that such a long‐life BL is maintained without the external supply of electrical energy, since BL is visible for a significantly longer time than the current pulse duration. It is found that a power law with the scaling exponent of 2/3 can be applied between the lifetime and size of the BL, independently of the experimental conditions. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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