Nice work Narcizo. I have some to add to your collection.
I used to work at the old UK synchrotron laboratory at Daresbury the SRS. For a public open day in October 2005 I compiled this list of placemarks showing as many storage ring synchrotrons as myself and a couple of colleagues could find on the planet. For each synchrotron marked there are three viewing heights. So if you just leave it running as a Google Earth tour it will zoom to each machine in turn.
If anyone reads this post and finds more machines, or mistakes in this kmz file, please let me know.

Chris Hall