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Re: Streamer V/I evolution

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


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

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:


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.