Re: 1-atm plasma streamers

Just a quick note: Yes, I've done discharges using 15Kv, 60ma neon sign 
transformers in atmospheric pressure argon. I have obtained 3ft discharges in 
a 5" pyrex tube. These are not self-starting, however. One must 'pull' this arc 
or use a small tesla coil to intitiate the discharge. Once the arc has started
though, it is very thin (1mm) and is kind of wiggly but has no branching. 
Very neat effect-please try it!

-Ed Harris