Re: THOR: First observations on streamer formation (try II)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Jim Lux <jimlux-at-earthlink-dot-net> 

At 08:20 AM 3/16/2004 -0700, you wrote:
>Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>Tesla list wrote:
> >
> > Original poster: Marco.Denicolai-at-tellabs-dot-com
>
> >  > If you can synchronize a camera and the "bangs", you could look at
> >  > how a streamer forms and grows.
> >
> > We are working on arranging $$$ for that. We are talking about >35000$
> > money. Last year I applied for four scholarships to buy a fast camera,
> > got none :(
>
>I was thinking on a camera that could take one picture per bang. You
>can also use several inexpensive cameras, taking pictures in sequence.

This technique works quite well..(e.g. 
http://www.reelefx-dot-com//Multicam/Mmain.htm ) The challenge is in 
synchronizing the cameras.  Most consumer cameras do NOT have readily 
synchronizable shutters (there's a microprocessor betwixt shutter release 
button and CCD imager).  Your best bet might be to get a bunch of standard 
video cameras with fast shutters (1/10,000 or 1/50,000 are common) and just 
run them together, hoping that they'll be at different phases.  You can 
build a little LED light bar with a ring counter to figure out which camera 
fired when, so you can interleave all the images.

There's a fairly good literature on improvised fast framing cameras on the 
web. Andrew Davidhazy at Rochester Inst of Technology is a great resource. 
http://www.rit.edu/~andpph/

Clever ideas with rotating mirrors, etc.




> >  > Have you seen my comment about a different tuning for a Tesla
> >  > coil that
> >  > increases the voltage gain beyond that 18% increase described in your
> >  > RSI paper?
> >
> > No. Where?