File:Williamsons Torodial Electron.png

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John Has released this file to be in the Public domain specifically for WikiPedia.
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Email: Hello Piet and everyone,

The one from the eprint may have a SPIE copyright on it. Again not sure here.

Had a go at making a new one for you but my old (windows) machine will no longer boot. Need to spend a bit of time getting Povray working. Anyone got POVRAY working on a MAC?

Here is one I'm sure has never been used, so the copyright is mine. Is this the kind of thing you are looking for?

Regards to all, John.