The Canadian Light Source has posted a
photo map of synchrotrons located around the world. The US has 9, Europe has 16, Japan has 8, China has 4, Russia and India have 2, Australia, Canada, Singapore, Jordan, and Brazil have 1 synchrotron. So if I counted correctly, there are 44 synchrotrons world wide. I surprised that Europe and Japan have so many and that China and Russia have so few.