抄録
Nitrogen gas mixtures have been studied as one of substitute for SF6. However, it is confirmed that active species of nitrogen supply electrons in space even under high pressure condition. In order to clear the electron supply mechanism, some kind of gases were mixed in nitrogen and delay time for each discharge was measured under the repeated voltage application. NO with high de-excitation rate coefficient for active species of nitrogen and SF6 with high electron affinity were used for mixing gases. The results showed that the number of supplied electrons against interval time showed the different tendency between that of NO and SF6. From these results, it was deduced that SF6 act only on attaching electrons and did not contribute on quenching processes, and electron was generated at the cathode surface by gammma effect. It was also deduced that NO quenced the activated species in space and many electrons were generated and the quenching reactions should be the many body reactions.
