In order to study the radial and axial temperature distribution of nano-second pulse spark discharge, this paper uses SOS pulse power supply to discharge the stainless steel needle electrode, uses spectrometer and ICCD high-speed camera to diagnose the spectrum of plasma, and conducts comparative analysis with the software. It is found that when the absolute value of radial displacement increases, the vibration temperature decreases gradually. When the absolute value of axial displacement increases, the rotation temperature decreases gradually and the temperature near the anode is higher. These results indicate the plasma temperature at different positions and provide diagnostic basis for the application of spark dis-charge plasma.

Pulse,Spark,Plasma,Spectrum,Rotation Temperature,Vibration Temperature