RE: First THOR measurement results

["Oxandale, Terry" <Toxandale-at-xxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

If the problem truely is a quenching issue, how difficult would it be to
add another pair of breaks to your RSG, thus increasing the separation
speed of the gap.

Terry

> ----------
> From: 	Tesla list[SMTP:tesla-at-pupman-dot-com]
> Sent: 	Thursday, November 02, 2000 1:07 PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Re: First THOR measurement results
> 
> Original poster: "Kennan C Herrick" <kcha1-at-juno-dot-com> 
> 
> Hi Marco (& all)-
> 
> A couple of comments, interspersed--
> 
> [snipped]
> 
> > 2. To discharge into air, I needed to add a copper stick on the top 
> > of the
> > toroid: only then I had a secure discharge into air or to a nearby 
> > grounded
> > rod.
> > Breaking into air sucks pretty quickly too all the energy away and 
> > there is
> > also
> > nothing strange with that.
> > 3. With no copper stick I have difficulties to get any streamer at 
> > all. This
> > makes me think that I don't generate enough potential at the 
> > secondary to
> > breakout. The toroid r.o.c. is a little too big. But my RSG is 
> > unable to
> > quench!!! See the snapshot!
> > 
> > Question:
> > - do you agree with me about the above?
> 
> [kch]  I agree that you don't have enough voltage to break out from
> the
> toroid itself.  My thought on this is as follows (but I haven't tried
> it
> yet):  Take a conductive (hemi)sphere of somewhat less radius than the
> c.s. radius of the toroid & place it down in the center of the toroid
> so
> that it just peeks up above the top, connecting it electrically to the
> toroid.  By adjusting the vertical height of that (hemi)sphere, you
> ought
> to be able to cause spark break-out, from it, at just prior to the
> highest voltage you can generate.
> 
> > - I think that if I could quench the RSG I could accumulate more 
> > charge on the
> > toroid, reach the actual breakout threshold and get longer streamers
> 
> > WITHOUT
> > NEEDING THE ROD: do you agree?
> > - in order to better the quenching, shouldn't I add a fixed SG set 
> > in series to
> > the RSG? Wouldn't that be OK?
> > 
> [kch] Can't comment on RSG since my setup is s.s.
> > 
> > Question 2
> > ---------------
> > The performance of Thor (spark length) decreases quite rapidly 
> > within 15-30
> > seconds. This is expecially noticeable without the copper rod placed
> 
> > on the
> > toroid: then streamers are quite rare and stop coming within 10-15 
> > seconds.
> > What
> > might be the reason? I suppose the RSG overheating and crippling the
> 
> > quenching
> > or what? I have already heard of this kind of behaviour but I can't 
> > recall what
> > was the explanation. Anybody?
> > 
> [kch]  Could anyone corroborate a suspicion that it might have to do
> with
> accumulated charged molecules in the vicinity diminishing the voltage
> at
> which break-out occurs?
> > 
> > 
> > 
> 
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