Swiss Light Source

Swiss Light Source
Name	Swiss Light Source
Location	Villigen, Canton of Aargau, Switzerland
Established	2001
Type	Synchrotron light source
Operator	Paul Scherrer Institute

Swiss Light Source

The Swiss Light Source is a synchrotron radiation facility at the Paul Scherrer Institute in Villigen, Canton of Aargau, Switzerland. It delivers highly collimated beams of X-ray and ultraviolet radiation used by researchers from institutions such as the ETH Zurich, EPFL, University of Zurich, University of Basel, and international laboratories including CERN, DESY, and ESRF. The facility supports interdisciplinary programmes spanning structural biology, materials science, and condensed matter physics with partnerships involving agencies like the European Commission and funders such as the Swiss National Science Foundation.

Overview

The facility comprises a storage ring, injector complex, and more than twenty beamlines that serve users from the Max Planck Society, Lawrence Berkeley National Laboratory, Argonne National Laboratory, and universities across Europe, North America, and Asia. Its capabilities include soft X-ray, hard X-ray, and infrared techniques used in tandem with instruments developed at the Paul Scherrer Institute and collaborators like Fritz Haber Institute and Diamond Light Source. The user programme is coordinated alongside peer facilities such as the SOLEIL synchrotron, BESSY II, SPring-8, and Advanced Photon Source.

History and Development

Conceived in the 1990s within the planning framework of the Paul Scherrer Institute and the Swiss Federal Office of Energy, the project advanced through design phases involving accelerator physicists from CERN and instrument scientists from ETH Zurich. Construction followed a procurement and civil works schedule informed by experience at facilities like the European Synchrotron Radiation Facility and was completed in time for commissioning in 2000–2001. Over ensuing decades upgrades drew on collaborations with the Paul Scherrer Institute accelerator division, the Swiss Science Council, and industrial partners in Switzerland. Major modernization projects paralleled initiatives at DESY and Diamond Light Source to increase brightness, stability, and coherence.

Accelerator and Beamline Technology

The storage ring is based on a double-bend achromat lattice engineered by accelerator teams with expertise from CERN and the Paul Scherrer Institute. Injector systems include a full-energy booster synchrotron and radio-frequency infrastructure reflecting designs used at Brookhaven National Laboratory and SLAC National Accelerator Laboratory. Beamline instrumentation integrates monochromators, undulators, and experimental endstations developed with contributions from the European Molecular Biology Laboratory and corporate partners such as ABB and Sulzer. Diagnostics and feedback systems are influenced by control frameworks from EPFL and electronics groups linked to the Swiss National Supercomputing Centre. Cryogenic, vacuum, and magnet technologies follow standards used by the Max Planck Institute for Solid State Research and Karlsruhe Institute of Technology.

Scientific Research and Applications

Researchers employ the facility for macromolecular crystallography in projects connected to the Human Genome Project follow-on consortia, for imaging studies tied to Paleoanthropology collections at the Natural History Museum, London, and for energy materials research related to ITER and battery initiatives coordinated with Empa and the Paul Scherrer Institute energy group. Investigations in catalysis often cite collaborations with the Fritz Haber Institute and industrial partners such as Novartis and Roche. Environmental science programmes interface with the European Environment Agency and fieldwork networks like the Global Carbon Project. Time-resolved experiments benefit users from the Institute of Photonic Sciences and structural biologists affiliated with the European Molecular Biology Laboratory.

Facility Operations and Governance

Operations are managed by the Paul Scherrer Institute under oversight from the Swiss Federal Department of Economic Affairs, with advisory input from international review panels including experts from the Max Planck Society and Imperial College London. Access is granted through peer-reviewed proposals evaluated by committees with representatives from the European Research Council, Swiss National Science Foundation, and partner universities like the University of Geneva. Safety, environmental compliance, and technical support draw on standards from the International Atomic Energy Agency guidance and coordination with regional authorities in the Canton of Aargau.

Notable Experiments and Discoveries

Significant outcomes include high-resolution protein structures that contributed to drug design efforts at Novartis and mechanistic studies of battery cathode materials in collaboration with Toyota Research Institute partners. Imaging campaigns produced palaeontological results relevant to specimens studied at the Natural History Museum, Vienna and the Smithsonian Institution. Condensed matter experiments on quantum materials engaged research groups from ETH Zurich and the Max Planck Institute for Solid State Research, while nanoscience projects linked to IBM Research advanced understanding of nanoscale magnetism. Multidisciplinary teams involving CERN, EPFL, and University of Basel leveraged time-resolved beamlines to probe ultrafast dynamics relevant to photochemistry and solar energy conversion.

Category:Synchrotron radiation facilities Category:Paul Scherrer Institute