Peculiarities in Optical Visualization of Nanosecond Electric Discharges Inside a Gas–Vapor Microbubble Floating in a Viscous Liquid

Nanosecond discharges are generated in the single gas microbubbles located in a viscous liquid. Liquid bee's honey is chosen as a test sample of viscous liquid. The oscillogram of the full current is recorded; the oscillogram of the conductivity current in the discharge is calculated. Optical visualization of the discharge channel in the microbubble is made. It is proved that the discharge has the barrier character. Peculiarities in optical visualization of pulse electric discharges inside gas-vapor microbubbles including mirror ring and a decrease of size inside the mirror ring are discussed. A practical method to restore the discharge image is introduced. It gives a possibility to obtain actual sizes of the discharge channels.