From: Paul
Date: Thu, 28 Jun 2001 11:30:34 +0100
Subject: Re: [TSSP] Toroid breakdown voltage indirect meas.
I wrote: > > Is this caused by corona forming on dust or smoke in the air > > around the topload perhaps? What color - not blue I hope? Malcolm Watts wrote: > In answer to the first questions, no. Blue is indeed the colour. A 9" > sphere on the coil of mine produced a ball of cold streamers around > 3' in diameter. Very faint. Again I initially thought it was some > trick of the light - until I realized there was no other light source > to account for it. Most odd. Perhaps this is the real breakout threshold, just that the available streamer current isn't enough the heat things up to clear visibility. Is the radius of the 'aurora' similar to that of the eventual streamers? Perhaps this is occuring on Thor as well, which, if the sums are correct should occur at 440kV, thus around 14.7kV feed voltage. A completely dark room for the topload and a photo-multiplier or a long exposure camera would sort the matter out. Certainly an interesting phenomena which we ought to try to understand. Thanks for bringing it up - I'm sure all will agree that it is very much on-topic. Cheers, -- Paul Nicholson, Manchester, UK. --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.