Abstract
Nitrogen with internal energy for long period supplies primary electron which leads to breakdown in the space. However, it is not elucidated about primary electron supply process. Accordingly, we changed the cathode surface area and the volume between electrodes to analyze the primary electron supply processes under high pressure nitrogen gas. It was confirmed that the number of primary electron depended on the surface area of cathode. In the next stage, experiment was carried out in N2/SF6 and N2/CF3I to confirm the effect by electron attachment reaction and quenching reaction of activated species. The decrease rate of primary electron number supplied by activated species is higher in N2/CF3I than in N2/SF6. In addition, dependence of the number of primary electron on the pressure and the interval time changed remarkably in case of N2/CF3I. Thus, it was confirmed that the breakdown probability changed depending on the number of primary electron supplied.
