Development of Ultrasonic Pulsed Plasma Jet Source for Remote Surface Treatment

We have developed a supersonic pulsed plasma jet device capable of long-distance and high-speed processing, and investigated its basic characteristics for surface treatment applications, mainly in the material and medical fields. The developed apparatus is equipped with a mechanism to transport active species in the plasma to the object to be treated by jetting the generated high-density plasma outward with supersonic pulse jets, which allows the gas flow velocity to increase significantly during pulse jetting compared with plasma generation. This enables the active species in the plasma to reach the treatment target before deactivation, thereby realizing surface treatment at a distance. Measurements using the Schlieren method revealed that the velocity of the jet flow reached Mach 1.7.

Automated summary

We have developed a supersonic pulsed plasma jet device that can perform long-distance and high-speed processing, and studied its basic characteristics for surface treatment applications. The device is equipped with a mechanism that transports active species in the plasma to the target object by ejecting the generated high-density plasma outward using supersonic pulse jets. This allows the active species to reach the treatment target before deactivation, enabling surface treatment at a distance. Measurements using the Schlieren method revealed a jet flow velocity of Mach 1.7.