From: Marco.Denicolai@tellabs.com
Date: Wed, 9 Oct 2002 07:31:18 +0300
Subject: RE: [TSSP] TOPV breakout threashoul
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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