{"title":"Vacuum breakdown strength of vacuum-degassed oxygen-free copper electrodes","authors":"S. Kobayashi, Y. Saito, Y. Nagai, Y. Yamamoto","doi":"10.1109/14.231532","DOIUrl":null,"url":null,"abstract":"Using an in situ electrode surface cleaning system, the vacuum breakdown strength of vacuum degassed oxygen free copper (VDOFC) electrodes satisfying ASTM-F-68 Class 1, 3, and 5 purity specifications was measured. Breakdown experiments reveal that the breakdown field (breakdown voltage/gap length) depends on the purity of the VDOFC electrodes. The initial breakdown strengths are 1.96*10/sup 7/ V/m for Class 1 copper, 1.89*10/sup 7/ V/m for Class 3, and 1.85*10/sup 7/ V/m for Class 5. After 500 breakdowns, these figures were improved to 18.3*10/sup 7/ V/m for Class 1, 17.5*10/sup 7/ V/m for Class 3, and 11.8*10/sup 7/ V/m for Class 5. It is concluded that the gas content in the electrodes is an important factor relating to the vacuum breakdown strength, provided the electrode surface is properly cleaned. >","PeriodicalId":13105,"journal":{"name":"IEEE Transactions on Electrical Insulation","volume":"67 1","pages":"500-506"},"PeriodicalIF":0.0000,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Electrical Insulation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/14.231532","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 12
Abstract
Using an in situ electrode surface cleaning system, the vacuum breakdown strength of vacuum degassed oxygen free copper (VDOFC) electrodes satisfying ASTM-F-68 Class 1, 3, and 5 purity specifications was measured. Breakdown experiments reveal that the breakdown field (breakdown voltage/gap length) depends on the purity of the VDOFC electrodes. The initial breakdown strengths are 1.96*10/sup 7/ V/m for Class 1 copper, 1.89*10/sup 7/ V/m for Class 3, and 1.85*10/sup 7/ V/m for Class 5. After 500 breakdowns, these figures were improved to 18.3*10/sup 7/ V/m for Class 1, 17.5*10/sup 7/ V/m for Class 3, and 11.8*10/sup 7/ V/m for Class 5. It is concluded that the gas content in the electrodes is an important factor relating to the vacuum breakdown strength, provided the electrode surface is properly cleaned. >
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