TXPES – A new soft X-ray spectroscopy beamline at the SESAME synchrotron

Abstract The Turkish Soft X-ray Photoelectron Spectroscopy (TXPES) beamline project at the Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME) synchrotron, led by Turkish Energy Nuclear and Mineral Research Agency (TENMAK) is an important development as it marks SESAME’s first beamline fully designed, manufactured, and installed by a member country, Turkiye in 2025. TXPES will be installed on the free branch of the Helmholtz-SESAME Soft X-Ray Beamline (HESEB) and will share the same photon source and monochromator. The beamline will provide tunable photon energies ranging from 90 eV to 1800 eV for detailed analysis of the electronic structure and chemical bonding of materials. The end station supports techniques such as X-ray Photoelectron Spectroscopy (XPS), Ultraviolet Photoelectron Spectroscopy (UPS) and Low-Energy Ion Scattering (LEIS), thanks to advanced tools like the PHOIBOS 150 Complementary Metal-Oxide-Semiconductor (CMOS) XPS/LEIS/UPS Analyzer. With its versatile design and High-Pressure Cell (HPC), the TXPES system offers exceptional surface sensitivity, spatial resolution, and energy resolution, making it ideal for interdisciplinary research in physics, chemistry, materials science, and engineering.