From: Marco.Denicolai@tellabs.com
Date: Tue, 8 Oct 2002 07:34:54 +0300
Subject: RE: [TSSP] TOPV breakout threashoul
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. > ============================================================ The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any reproduction, dissemination or distribution of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Tellabs ============================================================
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.