TOMCAT: Multimodal Multiscale Dynamic Imaging

TOMCAT is a state‑of‑the‑art X‑ray imaging facility at the Swiss Light Source (SLS), dedicated to high‑resolution, dynamic, multi‑modal tomographic microscopy across a broad spectrum of scientific applications. 
 
Operated by the  X-ray Tomography Group at PSI,  TOMCAT integrates two complementary beamlines — S‑TOMCAT and I‑TOMCAT — to enable both absorption‑based and phase‑contrast imaging with isotropic voxel sizes ranging from a few hundred nanometers to ten micrometers, using either monochromatic or filtered white‑beam illumination. 
 
TOMCAT will resume regular user operations in Experimental Period 2026‑II, with the next proposal submission deadline on March 16, 2026 (midnight). For information on how to apply, please visit the Submitting Proposals  page.
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I-TOMCAT First Tomo

Brand new I-TOMCAT beamline comes to life

Marking another milestone in the TOMCAT 2.0 upgrade project, I-TOMCAT — our newly built beamline — received its first X-ray light on September 25, 2025.

stomcat first light tomo with scale bar

S-TOMCAT beamline receives first X-ray light

On June 25th 2025, the S-TOMCAT beamline shutters were opened to receive first X-ray light from the new SLS 2.0 storage ring. 

 

Jisoo Kim receives PSI Thesis Medal 2023

Jisoo Kim receives PSI Thesis Medal 2023

Jisoo Kim receives the PSI Thesis Medal 2023. With this award, PSI recognises outstanding PhD theses, achieving  a high degree of innovation and potentially leading to scientific breakthroughs. Jisoo holds a Master of Science from the Korean Advanced Institute of Science &Technology and defended his thesis entitled “Towards time-resolved X-ray scattering tensor tomography” at ETH Zürich.

jisoo kim

Jisoo Kim bags the 2022 Werner Meyer-Ilse Award

Jisoo Kim was awarded the 2022 Werner Meyer-Ilse Memorial Award. The WMI Award is given to young scientists for exceptional contributions to the advancement of X-ray microscopy through either outstanding technical developments or applications, as evidenced by their presentation at the International Conference on X-ray Microscopy and supporting publications.  Jisoo was awarded for his development of the method "Time-resolved x-ray scattering tomography for rheological studies", and is co-recipient of the award with Yanqi Luo from the Advanced Photons Source for her work on applications. The award was presented during the 15th International Conference on X-ray Microscopy XRM2022 hosted by the National Synchrotron Radiation Research Center (NSRRC) in Hsinchu, Taiwan on 19 - 24 June, 2022.

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