From: Bert Hickman
Date: Wed, 09 Oct 2002 20:57:01 -0500
Subject: Re: [TSSP] TOPV breakout threashoul
Hi Marco,
That sounds right! I find it most interesting that most professional
"long spark" researchers have had to resort to heroic measures to
generate and study arrested leaders, using impulse generators shunted by
precision triggered crowbar gaps. Meanwhile, even novice Tesla Coilers
generate similar arrested leaders with ease (at perhaps 1/10,000th the
cost or less). I honestly think it's a case of academic "blindness" -
perhaps Tesla Coils are considered old ground -not suitable for new
research. But we know better... :^)
I think the time is ripe for applying a precision research Tesla Coil,
TSSP theory/modeling, and simultaneous electrical/image captures to do
some very solid long spark research! The precise control (bang size, rep
rate, quenching...) offered by Terry's OLTC makes it a low cost, but
formidable, HV research vehicle!
Best regards,
-- Bert --
--
Bert Hickman
Stoneridge Engineering
"Electromagically" (TM) Shrunken Coins!
http://www.teslamania.com
Marco.Denicolai@tellabs.com wrote:
>
> Hi Bert,
>
> You are right. Back to home I had a change of consulting the Meek text
> again and tell me if I got it:
>
> - "inhibited discharge" is typically a discharge that remains at the
> corona stage because of a dielectric between the gap electrodes. Typical
> example are ozone generators. You never have breakthrough.
> - "arrested leaders" are what I mentioned, actually (the double paralled
> gap, leaders not jumping the whole gap, etc.). These as arrested on a
> timely base.
>
> I was astonished when I read about that because, as you write below, it
> sounded to me as a perfect explanation for the typical TC streamers. My
> book reading is not yet over but I haven't yet found any more feasible
> explanation. It looks like the majority of researched discharges are
> between the gap electrodes, where the electrodes are eventually
> _bridged_ by the discharge. Or it is the case of pure corona, glow, or
> tiny filaments.
>
> Best Regards
>
> > -----Original Message-----
> > From: bert.hickman@aquila.net [mailto:bert.hickman@aquila.net]
> > Sent: 8. lokakuuta 2002 15:36
> > To: tssp@abelian.demon.co.uk
> > Subject: Re: [TSSP] TOPV breakout threashoul
> >
> >
> > Marco and all,
> >
> > "Inhibited Discharges" have also been termed "arrested leaders" -
> > reducing terminal voltage stops further leader propagation in its
> > tracks. TC discharges which fail to connect to ground ("air
> > streamers")
> > are actually inhibited discharges, their propagation ultimately being
> > stalled by collapsing terminal voltage as we pass voltage peaks and
> > begin decreasing terminal potential. TC air discharges could be
> > described as a rapid succession of inhibited discharges (or arrested
> > leaders), typically of both polarities.
> >
> > Best regards,
> >
> > -- Bert --
> > --
> > Bert Hickman
> > Stoneridge Engineering
> > "Electromagically" (TM) Shrunken Coins!
> > http://www.teslamania.com
> >
> > Marco.Denicolai@tellabs.com wrote:
> > >
> > > Hi Marc,
> > >
> > > In my novice quick browsing of the field literature of last week, I
> > > bumped into the "inhibited discharge" concept. The idea is
> > that it is
> > > possible to stop the spark growth in the middle, virtually
> > at any time
> > > before it's "complete". How they do it is simply by using a
> > second spark
> > > gap in parallel with the observed one. Obviously this one is set to
> > > trigger at a lower voltage than the observed gap.
> > >
> > > Maybe you have just been experiencing an inhibited discharge?
> > >
> > > About the energy going to ground, there are several
> > references reporting
> > > that AC discharge works as follows. When the voltage derivative is
> > > positive, the spark is "on", while when the instant voltage is
> > > decreasing (negative derivative) the spark turns off
> > momentarily. It's
> > > not necessarily feeding the spark all the time... And the
> > safety gap is
> > > not necessarely on all the time too.
> > >
> > > Best Regards
> > >
> > > > -----Original Message-----
> > > > From: mystuffs@orwell.net [mailto:mystuffs@orwell.net]
> > > > Sent: 7. lokakuuta 2002 23:01
> > > > To: tssp@abelian.demon.co.uk
> > > > Subject: Re: [TSSP] TOPV breakout threashoul
> > > >
> > > >
> > > > Bert, all
> > > > The space charge is a very strong field i think.
> > > > In one of the early videos i made of the triggered gap firing
> > > > my little
> > > > test coil, I noticed something very strange. When the
> > safety gap would
> > > > fire the normal 2' or so leaders all of the sudden turned
> > > > into a series
> > > > of very faint short streamers, many, many of them equally
> > > > spaced around
> > > > the toroid. This baffled me because i assumed that any tank
> > > > charge would
> > > > be dumped into ground?
> > > > I looked and looked at this without any good
> > explanations coming to
> > > > mind, I mean it happened every time the safety fired.
> > > > Then i got to thinking, Maybe this charge isn't coming
> > from the toroid
> > > > at all, maybe it is the surrounding space charge being
> > > > drained into the
> > > > toroid to ground somehow?
> > > > It sounded like such a far fetched idea that i never posted
> > > > it, but it
> > > > does seem some of them were actually dissociated from the toroid.
> > > > I know this really doesn't help us any, but i thought
> > i'd toss it out
> > > > for review.
> > > > Take care,
> > > > Marc
> > > >
> > > > Bert Hickman wrote:
> > > > >
> > > > > Marco.Denicolai@tellabs.com wrote:
> > > >
> > > > >
> > > > > Hi Marco,
> > > > >
> > > > > I'm probably the guilty party. You're correct - a single
> > > > number fails to
> > > > > adequately describe the complexity of the situation,
> > > > especially for very
> > > > > fast rising pulses or where there's significant field
> > enhancement
> > > > > through interactions with preexisting space charge.
> > > >
> > >
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