Abstract
An electrode structure with two anodes, one of which is covered by an insulating material layer with a micropore, is proposed in this letter, and adopting this electrode structure enables a special vacuum discharge phenomenon, by which a visible ejected plasma jet is formed near the anode in a pulsed low-current (∼200 A) vacuum discharge to be firstly observed. According to experimental study and theory analysis, the formation mechanism of the discharge phenomenon observed above is analysed. Study on this special discharge phenomenon is of vital importance for revealing the basic physical processes in a vacuum discharge.
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