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Jim,
I think the other Phil (Phil S) - whose coil it is - and has to do all
the physical work :-) - has commented already, but I liked your
suggestion of:
/>>------------//
//"I wonder if we could figure out a way to segment a large coil
vertically, so if a segment gets damaged, you can just rewind that
segment. Just off the top of my head, I'm thinking about something like
segments with a hundred turns or so. Could we come up with a way of
making the connections in a "good" way. I'm almost thinking about how
you using field grading rings on a Van de Graaff. You don't want a
complete shorted turn, but you could terminate the winding in some sort
of flat terminal on the "mating face" of a segment. You'd stack the
segments, and then put some compression on it (threaded fiberglass rod?)"//
//>>-----------/
This seems like quite a novel idea and a quick way of getting a damaged
coil back up and running fairly quickly. I think with the coil in
question due to it's size (toroid c/height is 87" / 7' 3") , and also
having a large diameter toroid (with a bigger 63" one in the pipeline)
you would loose the vertical rigidity that a 12" solid tube attempts to
provide, but it could be viable on a medium 6" to 8" coil; one that is
not too big so as to have stability issues, but is still large enough
making rewinds something to avoid.