Paul Scherrer Institute PSI
Forschungsstrasse 111
5232 Villigen PSI

Director: Prof. Dr. Christian Rüegg

Main telephone number: +41 56 310 21 11
Contact form

Please note our contact page.

PSI wants its website to be user-friendly. We welcome your feedback. Please send your suggestions to the

PSIWeb content is subject to change without warning.

PSI will investigate any evidence of potential violations of laws, instructions, directives or third-party rights caused by content on PSI pages, and will instigate measures as necessary.

The web pages at contain official pages produced by the PSI Directorate.

PSI's web presence also includes web pages independently produced and updated by individual PSI research units and departments and their staff. The statements made by one or more authors/creators of such pages are not binding, and do not necessarily represent the views of PSI.