Research on Lightning Attraction Ability of Lightning Rod with Insulation Covering and Series Air Interstice

Analysis of electric field can be realized through observing the charge distribution around the tip of a lightning rod with insulation covering and series air interstice by means of high speed camera. From the test phenomenon, it can be achieved that, under the same voltage, compared to a common lightning rod, charge density in the lightning leader channel of a lightning rod with insulation covering and series air interstice is much larger, the thermal ionization is more violent, the leader channel is explicitly longer and the forward electric field density is obviously strengthened. The test results indicate that the lightning attraction ability of a lightning rod with insulation covering and series air interstice is evidently better than a common rod.