Re: Streamer growth and filming it all (was Re: Corona andSphere- Puzzle -addition)
The channel is visible even in the earliest stages, even though it is not
brightly luminous. Essentially, air doesn't really start to conduct until
it is around 5000K, by which time it is nice and visible. The curve of
temperature vs conductivity has a real "step" in it. There are plenty of
photographs of the leader and streamers (before the spark) in the various
books, so it must be luminous enough to record (of course, a goodly part of
them use image intensifiers).
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Streamer growth and filming it all (was Re: Corona
andSphere- Puzzle -addition)
> Date: Tuesday, November 02, 1999 6:59 AM
> Original Poster: "Jeff W. Parisse" <jparisse-at-teslacoil-dot-com>
> Terry (et. al.),
> > What I must wonder is if 8000 FPS is fast enough?
> I bet what we really want to see is invisible.
> Once the ion channel is lit brightly enough for a camera
> (or human eye for that matter) to see, it's already been
> established and therefore of less scientific value than
> the actual streamer formation data that we seek.
> Established arc channel data is valuable information and
> can help us explore arc formation theories, however, the
> question we seek to answer is "What factors affect the
> growth of arc channels?". I suspect that the phenomenon
> we seek to observe is invisible.
> Jeff W. Parisse