Barely larger than a fingernail, the miniature Roman box lock from the 3rd or 4th century AD
Barely larger than a fingernail, the miniature Roman box lock from the 3rd or 4th century AD is skilfully crafted out of gold. The iron mechanism inside remained hidden for a long time because conventional imaging techniques were thwarted by the dense gold casing. It was only with the help of neutron tomography at PSI that the box lock could finally be deciphered non-destructively. © LWL/S. Brentführer
01.05.2025
•Large research facilities
•9 min

A tiny golden object from Roman times

PSI’s David Mannes has used neutrons to unravel the mystery of a fascinating archaeological artefact.

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Barely larger than a fingernail, the miniature Roman box lock from the 3rd or 4th century AD
Barely larger than a fingernail, the miniature Roman box lock from the 3rd or 4th century AD is skilfully crafted out of gold. The iron mechanism inside remained hidden for a long time because conventional imaging techniques were thwarted by the dense gold casing. It was only with the help of neutron tomography at PSI that the box lock could finally be deciphered non-destructively. © LWL/S. Brentführer
Glühbirnen
25.04.2025
•Energy and Climate
•7 min

Targeted funding of innovation for the energy transition

How do innovations arise and how can they be specifically encouraged for the energy transition? PSI researcher Michael Weinold has been looking into this question using LED lamps as an example.

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Close-up of a glass vial containing a cobalt-based catalyst powder, captured in the lab at the Paul Scherrer Institute PSI. Researchers at the PSI Center for Energy and Environmental Sciences have discovered why this catalyst performs more efficiently in alkaline environments during hydrogen production.
Close-up of a glass vial containing a cobalt-based catalyst powder, captured in the lab at the Paul Scherrer Institute PSI. Researchers at the PSI Center for Energy and Environmental Sciences have discovered why this catalyst performs more efficiently in alkaline environments during hydrogen production. © Paul Scherrer Institute PSI/Mahir Dzambegovic
11.04.2025
•Energy and Climate
•5 min

A faster route to green hydrogen

The pH value determines how easily hydrogen can be produced from water when cobalt is used as a catalyst. PSI researchers have now found out why.

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31.03.2025
•Energy and Climate
•6 min

Net zero: Taking raw materials into account

A new calculation model from PSI illustrates the complex interdependencies between technology, demand for critical raw materials, and environmental impacts on the road to climate neutrality.

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Tiny section of a mouse brain: a few dozen nerve cells with their synapses are shown, and thus only a fraction of the 100 000 cells that cavort in a cubic millimetre of brain. © MICrONs Consortium et al.
Tiny section of a mouse brain: a few dozen nerve cells with their synapses are shown, and thus only a fraction of the 100 000 cells that cavort in a cubic millimetre of brain. © MICrONs Consortium et al.
27.03.2025
•Health Innovation
•9 min

Creating circuit diagrams of the brain

Using brain circuit diagrams to understand Alzheimer's. 

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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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PSI Frontpage New

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

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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.
•Fundamentals of Nature
•9 min

With pad, pencil, and algorithms

People

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

Overview

Themes in focus

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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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