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Re: High speed Tesla spark photographs



Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 07:35 PM 9/16/2006, Tesla list wrote:
Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Peter,

This is probably the most impressive Tesla coil spark photo I have ever seen!!

I enhanced and commented it here:

http://drsstc.com/~piranha/PIRANHA/STREAMER.jpg

You can see every known leader phenomena in it!!!!

Here is a reference from Bazelyan/Raizer.

http://drsstc.com/~piranha/PIRANHA/STREAMER-ref.jpg

It looks like the leader tip stalls a bit probably as that cycle reverses and cuts off the power. The next cycle reheats it and eventually it goes onward and briefly stalls again.

Amazingly, you can see the streamer branches(!!!) at the very tip on the right where it is darker.

Looking forward to more!!!

This is fantastic stuff!!! Your pictures are some of the best available of any leader arc and probably far better!!!

Happily, I just got my mirrors in ;-))) A lot is going on the next few days, but I will see what I can get going!!

You might want to check out Andrew Davidhazy's pages at RIT. He's a professor who teaches a class in high speed photography, and if the pages don't answer a question, an email to him might be productive. The images you're getting are wonderful, and I think he'd be intrigued.
http://www.rit.edu/~andpph/

There's also a book published by SPIE on rotating mirror streak and framing cameras that you might find interesting. Some years ago, I was contemplating trying to take high speed motion pictures of two colliding bullets at around 1 Megaframe/sec, and did a fair amount of research on how to go about doing it.


Cheers,

        Terry