The
Paul Scherrer Institute (PSI) is a multi-disciplinary research institute which belongs to the
Swiss Federal Institutes of Technology Domain covering also
ETH Zurich and
EPFL. It was established in 1988 through the merger of EIR (
Eidgenössisches Institut für Reaktorforschung, Federal Institute for Reactor Research, established in 1960) and SIN (
Schweizerisches Institut für Nuklearphysik, Swiss Institute for Nuclear Physics, established in 1968). It is based in
Villigen and
Würenlingen.