LASER TRIGGERING OF ELECTRIC BREAKDOWN IN LIQUIDS

被引：11

作者：

SUNESSON, A ^{[1
]}

BARMANN, P ^{[1
]}

KROLL, S ^{[1
]}

WALFRIDSSON, L ^{[1
]}

机构：

[1] ABB,CORP RES,VASTERAS,SWEDEN

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 1994年 / 1卷 / 04期

关键词：

D O I：

10.1109/94.311711

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：

Electric breakdown in semihomogeneous geometries has been studied in n-hexane and transformer oil using a laser triggering method for fields far below the spontaneous breakdown field. The method uses a laser-produced plasma to initiate the breakdown. Strong self focusing in the liquids was limited by increasing the numerical aperture of the laser beam to > 0.20 prior to focusing. Electrical breakdown could be triggered at fields as low as 50 kV/cm in transformer oil and 25 kV/cm for n-hexane. The time lags are between 30 and 200 mus, depending on voltage, liquid, and gap size. Current and light emission measurements of the prebreakdown phenomena are presented and a model for the triggering process is proposed.

引用

页码：680 / 691

页数：12

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