Synchronization of positive surface streamers triggered by vacuum ultraviolet in atmosphere

摘要

The synchronous generation of the surface streamer discharges from two electrodes m air is investigated in terms of wavelength and intensity of the discharge light as a trigger for the synchronization of the surface streamers. It is found that the light emitted from the first streamer causes the photoelectron emission and the photoionization in the vicinity of the opposing electrode. triggering synchronous discharge of the second streamer. The wavelength of the light contributing to this phenomenon is shorter than 250 nm, with a remarkable rise in synchronization probability from 164 rim to 115 rim. This is considered to be due to the existence of the photoabsorption windows for oxygen in this vacuum ultraviolet region. These results suggest that the photon energy required to supply initial electrons sufficient to trigger the surface streamers on an acrylic resin insulator is at least 5 eV and more enhancernent is found at 8 and 10 eV in this study.