Re: High speed Tesla spark photographs

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Peter Terren" <pterren@xxxxxxxxxxxx>

I have been working on a setup to show high speed streak photos of 
Tesla sparks. Setup is a 3000 RPM synchronous motor with a single 
mirror which reflects the sparks image to my Nikon D70s with 180mm 
lens. I can resolve the 100kHz ring down sparks readily with about 
1us resolution. 1 camera pixel is 100ns. Calibration is geometrically 
and with a LED at 100kHz.
With this running on a 6 inch spark to ground I can see detail of the 
central channel of the initial spark, details of the 5 or so ring 
down sparks, gaps in the spark channel, immediate and delayed 
electrode ionisation effects and (I think) a spark hitting a dust mote.
Photos and details here:
http://tesladownunder.com/HighVoltage.htm#High%20speed%20Tesla%20spark%20photography
Terry is also working on a more advanced purpose built setup.

Peter
http://tesladownunder.com