File:Deep dielectric discharge (Lichtenberg figure) - RADECS 2013 - Oxford, England, UK.webm
Original file (WebM audio/video file, VP8/Vorbis, length 2 min 10 s, 1,280 × 720 pixels, 1.65 Mbps overall, file size: 25.55 MB)
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This demonstration was performed by Keith Ryden of the Surrey Space Center, University of Surrey, as part of the RADECS conference short course in Oxford, September 2013, in order to illustrate one of the main hazards of space weather for satellites -- i.e. 'deep dielectric discharge'. Photography was by Johan Ideström of OHB Bremen. • Radiation due to space weather can cause a gradual build-up of electrostatic charge in insulating (plastic) materials on spacecraft which can suddenly discharge causing upset and damage to on-board systems. • For the purposes of the demonstration a transparent material was used so that the audience could see the electrostatic discharge in progress - a mechanical shock was used to trigger it off. The resulting dramatic 'lightning storm' goes on for some time! • The conduction pathways are vaporised leaving thin hollow tubes permanently remaining in the material in the form of a 'Lichtenberg' fractal pattern.
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| Date | |
| Source | deep dielectric discharge (Lichtenberg figure) |
| Author | Johan Ideström |
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This file, which was originally posted to
Johan Ideström, was reviewed on 2 February 2014 by reviewer Alan, who confirmed that it was available there under the stated license on that date.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:05, 2 February 2014 | 2 min 10 s, 1,280 × 720 (25.55 MB) | Jacopo Werther (talk | contribs) | HD1280x720 video + audio (the former HD1920x1080 video is without audio) | |
| 15:05, 2 February 2014 | 2 min 9 s, 1,920 × 1,080 (71.02 MB) | Jacopo Werther (talk | contribs) | == {{int:filedesc}} == {{Information |Description =This demonstration was performed by Keith Ryden of the University of Surrey, as part of the RADECS conference short course in Oxford, September 2013, in order to illustrate one of the main hazards o... |
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