From: boris petkovic
Date: Mon, 20 May 2002 11:46:20 -0700 (PDT)
Subject: Re: [TSSP] Racing arcs
Paul & All (especially Terry and M.Denicolai), Paul wrote: I've completely ignored space charge, and that > could alter the > picture quite a bit. > Space charge around the topload will reduce > the surface > field strength for a given topvolts. Therefore if > the streamer > dynamics acts to clamp the surface field at 26kV/cm, > it will not > clamp the topvolts if significant space charge is > present. Topvolts > will continue to rise causing more streamer-feet of > charge to join the > space charge as necessary to limit the surface to > 26kV/cm. In that > case, the topvolts still will not rise past the Vtop > given in the > web page tables, and nor will the coil surface > fields rise past the > values given in the animations, but it does reduce > or destroy the > usefulness of the 'breakdown ratio' that I defined > in a previous post, > which relied on perfect topvolts clamping. --- I'm glad base-line of problematics associated with discharging state of coil is realised. About 26 kv/cm for various frequencies,and especially about corona formative time lags I'm not sure at all. When it comes down to TCs rule I've learned :Expect unexpected. Now it's turn to Terry Fritz and Marco Denicolai to get in here:Msms ,many msms! First of all,Thor is a big coil and its toroid should be suitable for placing a HF response E-field probe at various positions on its surface. Terry ,I'm considering composing and sending a long post to Paul for various low and high energy experimental msms you will be supposed to conduct on your coils.Time soon to use those fine gadgets you have there. --- > The issue of space charge certainly complicates > things! ---- Very much so.Nonlinearities and unknown stages of discharging dynamics are the issues software can not sucessfuly cope with.From that point of view,somehow I feel we have reached theoreticall "wall" in the project. As I said ,further progress in software should be expected in lines where software uses experimental data more than checking them out. regards, Boris __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.