Imad El Haddad is head of the Atmospheric Molecular Processes group in the Laboratory for Atmospheric Chemistry at PSI’s Center for Energy and Environmental Sciences. For his new study of the formation of organic aerosols, he led a team of more than 70 researchers from Europe and North America.
Imad El Haddad is head of the Atmospheric Molecular Processes group in the Laboratory for Atmospheric Chemistry at PSI’s Center for Energy and Environmental Sciences. For his new study of the formation of organic aerosols, he led a team of more than 70 researchers from Europe and North America. © Paul Scherrer Insitut/Mahir Dzambegovic
21.03.2025
•Energy and Climate
•6 min

Pollutants often originate in the air

In the CLOUD experiment at CERN, PSI researchers have measured with unprecedented precision how harmful organic air pollutants are formed and dispersed.

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Araris Team
17.03.2025
•Health Innovation
•5 min

A superlative milestone

PSI spin-off Araris Biotech AG achieves valuation at unicorn-level!

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Araris Team
Tumorboard PSI
© Scanderbeg Sauer Photography
13.03.2025
•Health Innovation
•10 min

“Even more cancer patients could benefit from proton therapy”

A newly published book describes how life-saving proton therapy was developed at PSI. Damien Weber explains why the full potential of the method has not yet been exploited.

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«Theorie und Simulation passen besser zu mir als experimentelle Forschung. Sie sind sauberer.» Dominik Sidler, Theoretischer Physiker am PSI, sucht mit seinen Simulationen die Einfachheit in der Komplexität.
«Theorie und Simulation passen besser zu mir als experimentelle Forschung. Sie sind sauberer.» Dominik Sidler, Theoretischer Physiker am PSI, sucht mit seinen Simulationen die Einfachheit in der Komplexität. © Paul Scherrer Intitut PSI/Mahir Dzambegovic
28.02.2025
•Fundamentals of Nature
•9 min

With pad, pencil, and algorithms

Physicist Dominik Sidler is developing fundamental theories for previously inexplicable phenomena.

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SLS 2.0: Wie man einen Teilchenbeschleuniger startet
25.02.2025
•Large research facilities
•9 min

SLS 2.0: How to start up a particle accelerator

The electrons are back: after its upgrade, the Swiss Light Source SLS is starting up again, step by step. 

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SNF Grant Hero
20.02.2025
•Fundamentals of Nature
•8 min

Prestigious funding for research at PSI

Concrete, chemical catalysis and the search for new physics – three PSI researchers have each received a grant from the Swiss National Science Foundation for these areas of research.

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SNF Grant Hero

PSI Frontpage New

Welcome to PSI, the largest research institute for natural and engineering sciences in Switzerland.

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Melvin Deubelbeiss
•7 min

Soldering on a big stage

People

Whoever makes it onto the podium here is one of the world's best professional talents: PSI electronics engineer Melvin Deubelbeiss won the silver medal at WorldSkills 2024.

Athanasios Mokos
•9 min

Master of the flow

People

Even as a student, Athanasios Mokos was excited by the dynamics of fluids. Today at the Paul Scherrer Institute PSI, he models complex processes such as the formation of deposits on reactor fuel rods.

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2300

Employees at PSI are working on the world of tomorrow.

5

PSI operates five particle accelerator-based large research facilities.

64

In a total of 64 centres, labs and groups, we conduct research into pressing societal issues.

3000

Every year, around 3000 researchers from all over the world carry out experiments at our facilities.
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