Welcome to PSI, the largest research institute for natural and engineering sciences in Switzerland.
Recent highlights from our research
Using terbium against lymphoma
Promising laboratory experiments at PSI show that radionuclide therapy with the radioactive element terbium could combat lymphoma effectively.
Using AI to identify genetic perturbations from cell images
New AI identifies genetic perturbations in chromatin – a potential approach in diagnostics and drug development.
Creating circuit diagrams of the brain
Using brain circuit diagrams to understand Alzheimer's.
Topic cloud
Current upgrade projects and research initiatives
Together with industry to innovation
ESA Centre of Excellence opens in Switzerland
The opening ceremony of the “European Space Deep-Tech Innovation Centre” ESDI brought together distinguished guests.
A superlative milestone
PSI spin-off Araris Biotech AG achieves valuation at unicorn-level!
ESA comes to Switzerland
The signing of a contract between the European Space Agency ESA and PSI marks the start of the European Space Deep-Tech Innovation Centre ESDI.
The people at PSI
With pad, pencil, and algorithms
Physicist Dominik Sidler is developing fundamental theories for previously inexplicable phenomena.
Soldering on a big stage
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.
Master of the flow
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.
Working at PSI
No job opportunities
PSI on social media
Rare disease, new insights:
A recent study at the Paul Scherrer Institute PSI reveals how genetic mutations can alter the fine internal structure of tiny cell projections known as cilia. This makes…
The quantum revolution is just beginning. As 2025, the UNESCO @International Year of Quantum Science and Technology, marks a century of breakthroughs, we asked our expert Cornelius Hempel, Group Head…
💡 Zinc detected in clogged pre-filled syringes
Employees of the technology transfer centre ANAXAM and researchers at the Paul Scherrer Institute PSI have been able to show, using the unique…
🇨🇭 Happy B-day, Switzerland! 🎂🎈 Alles Gueti zum Geburi, Schwiiz! 🎉🇨🇭
Sunrise over #VilligenValley – not a bad way to start August 1st, right? 🌄✨ How are you celebrating today — grill, hike, or beam…
The quantum revolution is just beginning. ✨ In 2025 — the UNESCO @International Year of Quantum Science & Technology and a century after the first quantum breakthroughs — we are entering a new era…
The quantum revolution is just beginning. ✨ In 2025 — the UNESCO @International Year of Quantum Science and Technology and a century after the first quantum breakthroughs — we are entering a new era…
🇨🇭 Welcome to PSI (1/3) 🇨🇭
🔬 Who we are
We’re the Paul Scherrer Institute PSI, Switzerland’s largest research center for natural and engineering sciences. As part of the prestigious ETH Domain, we…
🇨🇭 Welcome to PSI (2/3) 🇨🇭
🧪 Experience research live
At PSI, science isn’t hidden behind closed doors — we open them for you:
👀 Explore the interactive exhibits at the PSI Visitor Centre and…
🇨🇭 Welcome to PSI (3/3) 🇨🇭
⚙️ Where cutting-edge science happens!
PSI builds and operates Switzerland’s most advanced large research facilities, including:
🔹 SLS - Swiss Light Source
🔹 SwissFEL …
Insights into the work of the ‘power plants’ of organic cells
New video from the series of #interviews with users of the @europeanxfel (for more videos check link in Bio)
The team led by Camila…
The quantum revolution is just beginning. ✨ In 2025 — the UNESCO International Year of Quantum Science and Technology and a century after the first quantum breakthroughs — we are entering a new era…
How does one measure radioactivity from the air?
🚁 With a high-tech detector, a Super Puma helicopter, and a clever algorithm.
In the latest #AdvancedComputing video, David Breitenmoser explains…
The quantum revolution is just beginning. ✨ In 2025 — the UNESCO International Year of Quantum Science and Technology and a century after the first quantum breakthroughs — we are entering a new era…
The quantum revolution is just beginning. ✨ In 2025 — the UNESCO International Year of Quantum Science and Technology and a century after the first quantum breakthroughs — we are entering a new era…
It’s a campus takeover… kid edition! This week, some of our youngest “researchers” took over the campus for our annual PSI Holiday Camp for employees’ kids. Five full days packed with games, mini…
A thousand years of simulation time – just to calibrate a radiation detector? That’s definitely too long. To find out David’s solution to solve this problem, watch the full video “Decoding Radiation”…
💡 Microchips, patents – and a scientist with foresight
The machines used to manufacture today’s nanometer-scale microchips are among the most complex technologies in the world.
At ASML, the…
Lehrberufe à la carte ✨: Am Sonntag, 29. Juni 2025 verwandelten die ca. 100 Lernenden des Paul Scherrer Instituts den Vorplatz des PSI Visitor Centers und des Personalrestaurants in einen Marktplatz…
Wirtschaftsgipfel der Mitte Aargau am PSI
Spannende Einblicke, zukunftsweisende Forschung und echte Innovationskraft – der diesjährige Wirtschaftsgipfel der Mitte Aargau fand am Paul Scherrer…
#LehreAmPSI:
Werde Polymechaniker/in EFZ
Bei uns am PSI stellen die Polymechanikerinnen und Polymechaniker spezielle Vorrichtungen zum Bau unserer Forschungsanlagen und Experimentiereinrichtungen…
⚡What happens when electricity meets water – and turns into fuel?
💧Emiliana Fabbri from PSI explains how electrolysis splits water into hydrogen and oxygen – a key step for storing renewable energy…
🎓 Science communication with energy – and about energy
How can complex energy research be brought into society – in a way that resonates across generations?
One answer can be found in Lucerne: At…
#LehreAmPSI:
Werde Physiklaborant/in EFZ
Du begleitest neue Experimente oder Entwicklungen von der Idee bis zur Realisation und sorgst für praktikable technische Lösungen.
Willst Du mehr über…
A Super Puma helicopter, a highly sensitive detector, and 1000 years of computing time, reduced to 2 weeks. 💻🚁 How PSI together with other partner organisations detects radioactive sources from the…
Neutrons reveal a new way to control magnetism at the nanoscale. 🧲⚡At the Swiss Spallation Neutron Source #SINQ, researchers have demonstrated how electric fields can steer magnetic structures in a…
PSI in numbers
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.