In order to study the anode combustion of intermediate-frequency vacuum arc

intermediate-frequency vacuum arc images are acquired in a detachable vacuum chamber applying CMOS high speed camera. The electrode is copper plat contacts with the gap 8 mm and the contact diameter 28 mm. The experiment is performed under the condition of different frequency and amplitude. The distribution of anode radiation intensity

the duration and movement of the anode high energy radiation area are analyzed and processed using MATLAB image processing technology. The results show that the influence of the current peak value on the distribution of anode radiation intensity is much greater than the frequency. The duration of anode high energy radiation area decreases with the frequency

but increases with the peak value of current. The anode high energy radiation area merge in the current rising stage

while shrink in the falling stage.