Title :
Development mechanism of impulse surface flashover on alumina dielectrics in vacuum
Author :
Ishida, Tsugunari ; Kojima, Hiroki ; Tsuchiya, Kenji ; Okubo, Hitoshi
Author_Institution :
Nagoya Univ., Nagoya, Japan
fDate :
Aug. 30 2010-Sept. 3 2010
Abstract :
We investigated the development mechanism of impulse surface flashover on alumina ceramic insulator in vacuum. We measured the still image and framing image of fast developing surface flashover in synchronous with applied impulse voltage and current waveforms. The light emission transition in initiation of surface flashover was clarified. We found the dark area is formed around the cathode and conducting channel is formed from the anode in developing process of surface flashover in vacuum.
Keywords :
alumina; ceramic insulators; flashover; vacuum insulation; alumina ceramic insulator; alumina dielectrics; current waveforms; impulse surface flashover mechanism; impulse voltage; light emission transition; Electrodes; Flashover; Insulation; Surface charging; Surface discharges; Surface treatment; Surface waves;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum (ISDEIV), 2010 24th International Symposium on
Conference_Location :
Braunschweig
Print_ISBN :
978-1-4244-8367-9
Electronic_ISBN :
1093-2941
DOI :
10.1109/DEIV.2010.5625860
