The Swiss Light Source (SLS) is a synchrotron located at the Paul Scherrer Institute (PSI) in Switzerland for producing electromagnetic radiation of high brightness.

12 straight sections between the TBAs of different lengths (3×11.5 m, 3×7 m, 6×4 m) accommodate the undulator magnets to generate ultraviolet and X-ray light of extreme brightness.

Finally 24 skew quadrupole magnets are adjusted to correct any torsion of the beam and to minimize the vertical emittance: a world record low value of 3 pm rad has been achieved in 2008.

A magnetic chicane bracketing the wiggler and creating dispersion translates this energy modulation into a horizontal separation of the slices from the core beam.

There are three protein crystallography beam-lines, two of which are partially funded by associations of Swiss pharmaceutical companies including Novartis, Roche, Actelion, Boehringer Ingelheim and Proteros.