From: Paul
Date: Sat, 11 May 2002 00:57:00 +0100
Subject: Re: [TSSP] Secondary voltage stress factor
Boris wrote: > Maybe high Mhz EM bursts at the begging of primary > conductive state could couple locally some energy and > induce enough of E-field in the very bottom of the > secondary? > Take a look at THOR primary current msm at : > http://www.abelian.demon.co.uk/tssp/md110701 Yes! I've never looked into that initial high frequency ringing. We don't know to what extent the primary is involved in this, but if the primary is ringing at it's self resonant modes with sufficient energy then it would apply major stress to the region of the secondary close to the primary. If sufficient energy was involved, it could also help to explain the reported inner-turn heating effect. I know the ringing frequencies on Thor from the FT, so I'll test the response of the secondary to primary excitation at those frequencies. Perhaps we can relate the modeled amplitudes to the observed ringing to estimate the energy involved. Could be a promising direction to look in, and it would be interesting to see if a case of racing arcs - the kind that appear close to the primary, could be cured by some damping around the spark gap. Well, along with the 20% and 50% tuning models, and another one where I'm tuning the primary to the 3/4 wave, modeling Bart's coil, and this closer look at Thor, that just about fills my computer up for the weekend! Hmm, come to think of it, the model will churn out the mode spectrum for the primary if I just rename it as the secondary. -- Paul Nicholson, --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.