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Effects of additives on prebreakdown processes in liquid cyclohexane . Part 1 : streamer initiation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ingebrigtsen, Stian Lundgaard, Lars E. Åstrand, P-O |
| Copyright Year | 2007 |
| Abstract | Conduction currents and streamer initiation in cyclohexane with various additives have been studied with fast impulses applied to a point plane gap. The additives were perfluoro-n-hexane, N,N-dimethylaniline, 1-methylnaphthalene, din-propylether, 1,1-difluorocyclopentane, trans-azobenzene and 1,4-benzoquinone. We have used shadowgraphic imaging and a differential charge-measurement technique with a sensitivity of 0.1 pC to integrate currents induced to the point electrode, below and in the same voltage range where streamers first appeared. Initiation voltages often varied between samples for both point polarities, but with low correlation to a specific additive type and concentration. We observed transient conduction currents of measurable magnitudes in the nano to micro ampere range for voltages around initiation in all samples with a point anode and in 10 out of 23 samples with a point cathode. Systematic variations with the concentrations of the additives were not found, however, for a point anode the more easily ionizable additives N,N-dimethylaniline and 1-methylnaphthalene induced notably larger currents. The results support a hypothesis where electron avalanches vaporize the liquid and initiate streamers in both point polarities. Transient currents may be induced by ions left behind by the avalanches that are not sufficiently developed to initiate streamers. Effects of additives on prebreakdown processes in liquid cyclohexane. Part 1: Streamer initiation 2 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://folk.ntnu.no/hestad/Paper_IOP_Part1_ver7.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
