Re: Streamer V/I evolution

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Marco,

you wrote:

> Subject:        Streamer V/I evolution
> From:   Denicolai, Marco <Marco.Denicolai@xxxxxxxxxxx> (by way of
>
> Hello all,
>
> Yesterday I acquired both toroid voltage and streamer current for a
> 10-bang discharge of Thor to a grounded stick. Actually I stored only
> the last 5 bangs to gain a little in sample rate. Results can be seen
> at:
>
> http://www.iki.fi/dncmrc/scratch/streamer.htm
>
> There you can find (for two streamers) the V and I curves for the last 5
> bangs. The current amplitude should be within 1% of precision, the
> voltage amplitude is still approximative as I haven't passed yet the
> data through my deconvolution algorithm.
>
> Streamer n.1 hits the target from bang n.8, while streamer n.2 is
> already hitting it from bang n.6. Bang size is fixed to 12.8 J.
>
> Anybody daring to start speculating about the interpretation of this
> data?

Neat! ;-)

It appears the peak current are about 10 amps for the streamer 
hits.  This seems low to me by maybe a factor of 10 to 100.  I note 
the readings in my tiny arc to ground test:

http://hot-streamer.com/temp/DaveTest40.gif
http://hot-streamer.com/temp/DaveTest-55.jpg
http://hot-streamer.com/temp/DaveTest-57.jpg

I am wondering if the scope is too low of bandwidth for the current 
monitor.  Instead of picking up fast high current peaks the low 
bandwidth is tuning the pulse into a slower lower current peak.

It is possible the arc is just getting noise into my stuff somewhere 
too and the currents are not that high at all?  Yours is far better 
shielded than mine.

Cheers,

        Terry