An ultra-high speed laser schlieren technique for studying electrical breakdown in dielectric liquids

27 October 2016

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 130-136
https://doi.org/10.1109/eidp.1973.7683903

Abstract

A powerful new diagnostic tool employing a Q-switched laser has been developed for the study of very high speed events in dielectrics. In an early experiment, it has been possible for the first time to study in detail cavity formation and growth in n-hexane under uniform field conditions immediately before breakdown. The results show that cavities play a vital initiation role in electrical breakdown, but that they never become very large because of unstable surfaces. This leads to irregular shaped cavities and very high field enhancement in the liquid itself, where impact ionization is likely to occur.

Keywords

ELECTRIC BREAKDOWN
CAVITY RESONATORS
LASER BEAMS
GENERATORS
LIQUIDS
OPTICAL PULSES
DIELECTRIC LIQUIDS

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