PSI equips the Swiss Light Source SLS for the future

Green light for SLS 2.0: The upgrade of the Swiss Light Source SLS at the Paul Scherrer Institute PSI plannned for the coming years can now proceed. Within the framework of the ERI Dispatch for 2021-2024, the funding for this renovation has been assured.

PSI-Direktor Christian Rüegg . © Paul Scherrer Institut PSI/Markus Fischer

The Swiss Dispatch on Promotion of Education, Research and Innovation (ERI) for 2021 to 2024 has now been agreed upon in the Swiss Parliament. It contains, among other things, the budget that the ETH Domain is to receive for the coming years. This includes the budget of 99 million Swiss francs that will be required for the planned renovation of the Swiss Light Source SLS. With that, the upgrade project, known as SLS 2.0, has been given the green light.

"We are very pleased about this funding commitment. This decision showed that the pandemic would not be able to damage the long-term vision for Switzerland as a research location," says PSI Director Christian Rüegg. "Even and especially in these times, we urgently need cutting-edge research."

Coronavirus research at SLS

From the very beginning of the Covid-19 pandemic, PSI undertook special efforts to advance research on the novel coronavirus. The Swiss Light Source SLS is playing an important role in this work, for example through the elucidation of protein structures that are part of the virus, and in the examination of lung tissue to gain better understanding of the coronavirus and its effects.

An investment in the future

As valuable as the current research at SLS is at this time, research is constantly evolving, and research facilities have to keep up. "In the foreseeable future, many scientific questions will arise that we would not be able to answer with today's SLS, or that would require a very long time to solve," says SLS 2.0 Project Leader Hans Braun. "We are very glad now that the upgrade will come." After the upgrade, SLS will provide a significantly more intense X-ray beam with which, in coming decades as in the past, it will still be possible to do research on the day's most pressing and emerging topics. "We will be getting significantly more data in the same amount of time. Or to put it the other way around: Extensive experiments that have, up to now, fallen through because they would have lasted weeks or months will then become feasible. For experiments that previously would have required 24 hours of continuous measurement, we will only need a little more than half an hour after the renovation."

Contact

Dr. Hans-Heinrich Braun
Project Leader, SLS 2.0
Paul Scherrer Institute PSI

+41 56 310 32 41
hans.braun@psi.ch 
[German, English, French]

Further information

SLS 2.0 - The upgrade of the Swiss Light Source SLS

About PSI

The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences in Switzerland. It is the central location of Switzerland’s large research facilities, available to both the scientific community and industry. Its research spans future technologies, energy and climate, health innovation and fundamentals of nature. The annual budget is CHF 450 million. PSI employs 2300 people; around a quarter of these are postdoctoral researchers, PhD students or apprentices. PSI is part of the ETH Domain, which also includes ETH Zurich and ETH Lausanne, as well as the other federal research institutes Empa, Eawag and WSL. (Current as of 06/2026)