From: "Terrell W. Fritz"
Date: Sun, 20 May 2001 20:57:23 -0600
Subject: Re: [TSSP] Genetic optimisation
Hi Paul, At 12:19 AM 5/20/2001 +0100, you wrote: snip... that all sounded goo to me! > >Not that any of the results would be particularly realistic, as I >don't suppose we can take into account the breakout characteristics of >the toploads involved. Is there any hope of being able to calculate a >reasonable estimate of the voltage at which a particular topload will >discharge? If not then any attempt at optimisation is just a piece of >recreational mathematics. If one inputs a top load voltage into E-Tesla6, it will create a field stress array in volts per unit distance. Thus, if you know the breakdown voltage of air, you can find the torroid voltage that will give that field stress. Voltage plot: http://hot-streamer.com/temp/MattD1.gif Voltage stress plot: http://hot-streamer.com/temp/MattD2.gif Basically, it seems to follow very closely the sphere's breakdown voltage of 3MV/m (3,000,000 volts per meter radius). Since the area of interest is very close to the top load's surface, the surrounding stuff does not have a great effect. However, that is assuming the breakdown voltage is the same at DC, 60Hz, and 350kHz. So you can find the voltage differentials per unit distance in the arrays of a field stress analysis and come up with the volts per meter stress in various places. The question then is when does air initially breakdown at say 300kHz? The fact that the voltage "suddenly" builds up rather than is a continuous stress is also a factor. "Pulsed" CW coils have very long swordlike streamers as opposed to pure CW coils due to this effect. Still thinking on this.... Cheers, Terry > >Food for thought. Comments welcome. > >Cheers, > >-- >Paul Nicholson, >Manchester, UK. >--
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.