Observation of prebreakdown light emission phenomena in liquid nitrogen

The prebreakdown density change streamers and the current pulses in liquid helium were investigated. A pointplane electrode system, consisting of a tungsten needle whose tip radius is 1 pm and a stainless steel plane was used. The streamers under impulse voltage conditions were observed using high-speed photography for both negative and positive polarities. For a negative streamer, the structure was only filamentary and propagates with very high speed. On the other hand, for a positive streamer, the structure was mainly spherical or hemispherical, and filamentary structure similar to the negative one was observed for a rare case. Comparing the propagation speed of filamentary streamer, the negative streamer had two orders of magnitude higher than the positive one.

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Polarity effect of density change streamer structure in liquid helium

Onodera

Mikami²,

Yamashita³

2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132)

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Prebreakdown light emission, density change streamer and current pulses in liquid nitrogen

Yamazawa

Sugiura²,

Yamashita³

ICDL'96. 12th International Conference on Conduction and Breakdown in Dielectric Liquids

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Prebreakdown light emission and density change streamer in liquid helium

Kaneko

Onodera²,

Hirata³

et al.

Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids (ICDL'99) (Cat. No.99CH36213)

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Observation of prebreakdown light emission phenomena in liquid nitrogen

Cited by 3 publications

References 2 publications

Polarity effect of density change streamer structure in liquid helium

Polarity effect of density change streamer structure in liquid helium

Prebreakdown light emission, density change streamer and current pulses in liquid nitrogen

Prebreakdown light emission and density change streamer in liquid helium

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