From: "Terrell W. Fritz"
Date: Tue, 21 May 2002 11:53:08 -0600
Subject: Re: [TSSP] Racing arcs
Hi Boris and all,
Please feel free to suggest any measurements you wish. It sometimes takes me
awhile to get them done but I am usually looking for things to do rather than
having too many ideas to test.
Cheers,
Terry
At 11:46 AM 5/20/2002 -0700, you wrote:
>
>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
>
>
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.