The Swiss Light Source is a synchrotron located at the Paul Scherrer Institute in Switzerland for producing electromagnetic radiation of high brightness. Planning started in 1991, the project was approved in 1997, and first light from the storage ring was seen at December 15, 2000.
The experimental program started in June 2001 and it is used for research in materials science, biology and chemistry.
Main component of the SLS is the 2.4 GeV electron storage ring of 288 m circumference:
Wikipedia https://en.wikipedia.org/wiki/Swiss_Light_Source
Official Website https://www.psi.ch/sls
Coordinates 47°32'4.055" N 8°13'16.593" E