Improved electrical insulation of vacuum gaps utilizing SiOx coatings

被引:0
作者
Allen, RJ [1 ]
Schoenbach, KH [1 ]
机构
[1] Old Dominion Univ, Phys Elect Res Inst, Norfolk, VA 23508 USA
来源
11TH IEEE INTERNATIONAL PULSED POWER CONFERENCE - DIGEST OF TECHNICAL PAPERS, VOLS. 1 & 2 | 1997年
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D O I
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中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Thin film coatings have been applied to metal electrodes in vacuum to increase the breakdown voltage. Through careful cleaning and polishing of uncoated stainless steel electrodes a breakdown field >50MV/m was obtained with a uniform field over a 1cm(2) cathode area. When coated with 2 mu m of SiOx the field emission current was reduced by up to at least three orders of magnitude and the breakdown field was increased to >100MV/m in every case. Recent improvements in the cleaning procedure of the metal surface have resulted in an increase of the breakdown strength to more than 140MV/m which is the largest field known to have been measured over a large area cathode.
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页码:531 / 536
页数:6
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