Frontpage of the Paul Scherrer Institut (PSI)

Compact and high-performance, like a Swiss Army knife

The X-ray free-electron laser SwissFEL really is as high-performance and versatile as planned.

Safely stored for a million years

Which site is most suitable as a deep repository for radioactive waste in Switzerland?

Aerosol formation in clouds

How chemical reactions in clouds can influence the global climate.

Particulates are more dangerous than previously thought

A precise look into the finest particles in the air shows how compounds harmful to human health are formed.

The Paul Scherrer Institute, PSI, is the largest research institute for natural and engineering sciences within Switzerland.

The Paul Scherrer Institute

The Paul Scherrer Institute PSI is a research institute for natural and engineering sciences, conducting cutting-edge research in the fields of matter and materials, energy and the environment and human health. By performing fundamental and applied research, we work on sustainable solutions for the major challenges facing society, science and the economy.

Learn more about the Paul Scherrer Institute