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Space charge effect for streamer initiation and propagation in water subjected to reciprocal traveling wave voltage pulse

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3 Author(s)
Kadowaki, K. ; Fac. of Electr. & Electron. Eng., Ehime Univ., Matsuyama ; Nishimoto, S. ; Kitani, I.

This paper deals with initiation and propagation processes of streamer discharges in water subjected to high-speed repetitive voltage pulse. The 50%-duty repetitive pulses were produced by the reciprocal traveling wave in a pulse forming cable which was connected with a point-plane electrode gap in a water-cell. Laue plot of time lag distributions for the streamer initiation indicated that the initiation probability during the second pulse application became much higher than that during the first pulse application. We concluded that the change in space charges distribution due to internal field during the rest-time after the first pulse enhanced the streamer initiation probability at the second pulse application. Temporal development in the positive streamers during the repetitive pulse application was observed using a gated image intensifies. When the pulse was relatively high, the streamer discharges started the propagation at the first pulse and then the discharge channel became long step by step at the subsequent pulse applications. It was also found that the periodical emission due to excitation of OH radicals was detected for a long period after the development of the streamer discharge in a spectroscopic measurement

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:13 ,  Issue: 3 )