Welcome to PSI, the largest research institute for natural and engineering sciences in Switzerland.
Recent highlights from our research
With pad, pencil, and algorithms
Physicist Dominik Sidler is developing fundamental theories for previously inexplicable phenomena.
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.
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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Current upgrade projects and research initiatives
Together with industry to innovation
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.
How catalysts remove dangerous nitrogen oxides
In industrial catalysis, iron is not equal to iron.
Fast as a plane, clean as a train
In a collaboration across Switzerland, researchers have evaluated the potential environmental impacts of so-called hyperloop systems.
The people at PSI
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.
Cristina Müller
Developing and redesigning radiopharmaceuticals for tumour therapies
PSI on social media
🔬 Important finding for hydrogen production! 💧⚡
Cobalt as a catalyst splits water better in alkaline conditions (pH > 7) than in acidic conditions. Why? PSI researchers discover: the catalyst…
Introducing the PSI Energy Compass: Navigating the Energy Transition
We’re excited to announce the launch of the PSI Energy Compass, a new publication dedicated to providing insights and…
Happy #WorldQuantumDay ✨🌍
This is the 5th webstory related to #Quantum #Materials that we publish in 2025 - the Year of Quantum Science!
✴ 𝐒𝐮𝐩𝐞𝐫𝐬𝐲𝐦𝐦𝐞𝐭𝐫𝐲 𝐬𝐡𝐨𝐰𝐬 𝐮𝐩 𝐢𝐧 𝐜𝐨𝐧𝐝𝐞𝐧𝐬𝐞𝐝 𝐦𝐚𝐭𝐭𝐞𝐫, 𝐧𝐨𝐭 𝐜𝐨𝐥𝐥𝐢𝐝𝐞𝐫𝐬 …
🔭⚛️ To celebrate World Quantum Day on April 14th, we’re diving into the fascinating world of ion traps a key tool in quantum research.
In quantum science, scientists use so-called “ion traps” to…
🧑🔬Im Labor für Radiochemie stehen strahlende Teilchen im Mittelpunkt. Die Forschenden der ETH Zürich und des Paul Scherrer Instituts untersuchen verschiedenste Aspekte von Radioaktivität: Wie lässt…
🚨 First light for science at SLS 2.0!
On April 10th, two of the first beamlines — Debye and PXIII — opened their shutters and received their first X-ray light for science.
🔬 Debye will drive…
It’s officially the end of "dark time" at the #SwissLightSource #SLS. This final quarterly video features the placement of the final stone 🧱 (actually concrete block!) in the storage ring marking the…
🧠 Using modern imaging to decode the brain - Adrian Wanner, a neurobiologist at the PSI Center for Life Sciences and his team are interested in a very special part of the brain and want to decode the…
Calculation model for a realistic path to climate neutrality
Achieving climate neutrality 🌱 – that is, not emitting more greenhouse gases than can be captured naturally or artificially – is an…
Did you guess right? @angela_mrspap is in the Experimental Hall at the Swiss research infrastructure for particle physics #CHRISP! ✨
Her team is calibrating a detector used in the MEGII experiment,…
An unsere Lernenden im letzten Lehrjahr:
Die Abschlussprüfungen stehen vor der Tür. Ihr habt in den letzten Jahren viel Engagement und Ausdauer bewiesen – jetzt könnt ihr zeigen, was ihr auf…
Guess where @angela_mrspap is! 🤔 She's at one of our large research facilities… but can you figure out which one? Let us know your guesses in the comments and stay tuned for the reveal! 👀
Our …
At CERN, an international research team led by PSI has gained crucial insights into the formation of particulate matter.
The new study shows: Pollutants from transportation 🚗, industry 🏭, and…
🔍✨ "It’s okay not to have a plan for your whole life!" 🌟
#WomenInScience: Claudia reminds us that priorities change over time, and it's important to embrace opportunities as they come, especially…
⚛️ As part of a 5-day study trip into modern particle physics and Albert Einstein’s legacy, organized by Bild der Wissenschaft @bildderwissenschaft, a well-known German science magazine, a group of…
🌟 "Science thrives in the right environment!" 🤝⚖️
#WomenInScience: Margaux reminds us to seek supportive spaces and balance doubt with confidence on our journey.
In honor of the International…
🌟 Neu in unserer Researcher-Portrait-Serie: Entdecke, wie Christian Bauer vom @paul.scherrer.institut Technologien – von Elektroautos bis zu nachhaltigen Flugtreibstoffen – und deren Auswirkungen auf…
🎓 Join the PSI & Park Innovaare Career Fair on March 20, 2025! 🔬
Mark your calendars! We are hosting our second edition of our Career Fair – a unique opportunity to connect highly qualified early…
✨ "You are not alone: trust your support system!" 🤝🌟
#WomenInScience: At the beginning of her career, Florencia found it challenging to balance everything: science, family, and personal life. But…
🛠️ The technologies of tomorrow don’t have to be made from the most rare and exotic building blocks. Arranged into beautiful atomic patterns in single layers, common-or-garden elements can give…
If you put matter in a special mirror box 🪞, its #chemical properties change. No one knows exactly what is happening with this strong light-matter coupling. This is a mystery 🤔just to Dominik Sidler…
Did you guess right? David is in the Neutron Imaging Facility ICON at the Swiss Spallation Neutron Source SINQ! ✨
Here, researchers are using neutron tomography to investigate corrosion on…
🔍✨ “Stay curious, believe in yourself, and never give up!" 🌟
#WomenInScience: In her early years of study, Ye found mathematical formulas overwhelming. However, she came to understand that not…
💡SLS 2.0: The electrons are circling through the new storage ring! 💡
It is a milestone for the most striking large research facility at PSI, the circular #SwissLightSource #SLS: After 15 months of…
Guess where David is! 🤔 He's at one of our large research facilities… but can you figure out which one? Let us know your guesses in the comments and stay tuned for the reveal! 👀
Our “Where Am I?”…
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.