Abstract:
National Synchrotron Radiation Research Center, Taiwan, has undertaken the construction of an Ultra-High Vacuum X-ray Photoelectron Spectroscopy (UHV-PES) end-station for the TPS 43A1 beamline, dedicated to investigating the rapid dynamic processes in advanced materials. The TPS 43A beamline will host three experimental end-stations in tandem: UHV-PES for conventional PES and Time-Resolved Photoelectron Spectroscopy (Tr-PES), along with two Ambient Pressure XPS (APXPS) systems for experiments under ambient pressure condition. The primary chamber of the UHV-PES end-station will incorporate dual analyzers facilitating a diverse range of measurements including PES, Tr-PES, Auger- and Photoelectron coincident spectroscopy (APECS), and soft X-ray magnetic circular dichroism within a single system. The beamline features a high-resolution, high-flux undulator with a bendable active mirror (AM) and plane gratings (PG), covering an energy range from 200 to 3000 eV and delivering an average photon flux of 1x1013 photons/s. This setup ensures an energy resolving power of at least 10,000 across the entire energy range. The focused beam size for the UHV-PES is 10(H) µm x 10(V) µm, while for APXPS stations I and II, the sizes are 50(H) µm x 20(V) µm and 50(H) µm x 20(V) µm, respectively, allowing for precise and detailed material analysis. The design of the beamline and UHV-PES end-station will be presented in details.
Keywords – X-ray Photoelectron Spectroscopy, Time-Resolved Photoelectron Spectroscopy, coincident spectroscopy