Stereo-photography of point-plane streamers in air

Details Stereo-photography of point-plane streamers in air Stereo-photography of point-plane streamers in air

2008-02-25

arxiv.org/abs/0802.3639v1

Appl. Phys. Lett. 92, 101502 (2008)

Physics

Plasma Physics

5 pages, 5 figures, accepted by Applied Physics Letters for publication on March 10th 2008

Scientific paper

10.1063/1.2894195

Standard photographs of streamer discharges show a two-dimensional projection. We here present stereo-photographic images that resolve their three-dimensional structure. We describe the stereoscopic set-up and evaluation, and we present results for positive streamer discharges in air at 0.2 - 1 bar in a point plane geometry with a gap distance of 14 cm and a voltage pulse of 47 kV. In this case an approximately Gaussian distribution of branching angles of 43 degrees is found; these angles do not significantly depend on the distance from the needle or on the gas pressure.

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