Illustration and scheme of the experimental set-up used for generation of plasma in liquid. (a) The glass tube
filled with water activated by gas bubbles; (b and c) Electrical circuits used for generation of self-running pulsedrepetitive
streamer-spark discharge between multi-pin and plane electrodes in water with intensive flow rate of air
bubbles. The electric current is directed perpendicular to the tube axis (b) or parallel to the tube axis (c); R is the
ballast resistor, SG is the spark gap, C is the capacitor, and r is the current shunt. The gap between the multi-pin
electrode and plane is 10–15 mm.
Fig.