Design of the first undulator beamline for the Siam Photon Laboratory

Study of Synchrotron Radiation Near‐Edge X‐Ray Absorption Fine‐Structure of Amorphous Hydrogenated Carbon Films at Various Thicknesses

“…Furthermore, it has been reported that the total gas pressure and negative bias voltage affected the hydrogen incorporation in the film [31][32][33]. From the ERDA and RBS results, it was confirmed that 2.5 MeV-He + irradiation promotes dehydrogenation of films without structural transfer from sp 3 to sp 2 hybridization [25]. However, these results suggest that the size of the clusters (a small cluster of the sp 2 site) in the films is limited by the hydrogen termination, and the cluster size can be decreased with the increase of the hydrogen content as a function of the film thickness.…”

“…The beamline photon source covers an energy range of 40 to 1040 eV at the resolving power of 10,000. The SR source at the storage ring was generated using a beam energy of 1.2 GeV; the details of this beamline's specifications and performance were reported elsewhere [24,25]. The NEXAFS spectra were measured in the total electron yield (TEY) mode at an incident angle of 60 ∘ , and the light polarization was parallel to the surface (s-polarization) at any light incident angle; that is, there was no influence of the X-ray polarization.…”

Effect of Metal Oxides (CeO2, ZnO, TiO2, and Al2O3) as the Support for Silver-Supported Catalysts on the Catalytic Oxidation of Diesel Particulate Matter

“…The beamline photon source had an energy range of 40–1040 eV at a resolving power of 10000. As reported elsewhere, the synchrotron radiation source at the storage ring was generated using a beam energy of 1.2 GeV. , The XPS was applied to analyze Ag 3d 3/2 , Ag 3d 5/2 , and O 1s on the top surfaces of the prepared catalysts with excitation photon energy ( h ν) at 600 eV. The kinetic energy range of 200–250 eV at a step size of 1.0 eV was used for the wide scan.…”

Commissioning of the soft x-ray undulator beamline at the Siam Photon Laboratory

“…BL3.2U is designed for soft x-ray photoemission and absorption spectroscopy (BL3.2Ua) and microscopy (BL3.2Ub) [1]. A planar Halbach-type undulator (U60) from Danfysik Co., Ltd is utilized to produce the soft x-rays at the straight section in the storage ring of the Siam Photon Source [2,3].…”