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The storage ring of the Siam Photon Source has eight beam channels, as shown in figure 4.1. At present, only synchrotron light from bending magnet sections can be utilised. The spectra from the bending magnet section, 6.4-tesla superconducting magnet wiggler and a plannar undulator are shown in Fig. 4.2. The first three operational beamlines (BL4, BL6 and BL8) utilize synchrotron radiation from the bending magnets (BM4, BM6 and BM8, respectively). BL4 is a vacuum ultraviolet beamline covering photon energy between 20 eV and 240 eV. Such a low photon energy range is suitable for investigating the electronic structures of solids and solid surfaces via the angle-resolved photoemission experimental technique. BL6 is a white light beamline for deep x-ray lithography used in fabrication processes of micro-structures with high aspect ratio. The BL8 beamline delivers monochromatic soft x-ray with photon energy between ~ 1.8 keV and 8 keV for X-ray absorption spectroscopy (XAS). The absorption measurements are now performed in the transmission mode. The fluorescence mode of measurement using a multi-element fluorescence detector will be available to enhance the detection sensitivity in 2007.
Four long straight sections of the storage ring provide space for insertion devices. Two insertion device beamlines are now under construction. One is a soft X-ray beamline, BL3, utilizing radiation from a planar undulator. The BL3 beamline is designed to deriver photon with energy between 40 eV and 1000 eV for photoemission spectroscopy (PES) and photoemission electron microscopy (PEEM). The other is a hard X-ray beamline, BL7.2, utilizing radiation from a 6.4-tesla superconducting magnet wiggler. Hard X-rays with photon energy between 5 keV and 20 keV delivered by the BL7.2 beamline will be used for protien crystallograpy (PX), XAS and small/wide angle X-ray scattering (SAXS/WAXS).
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Last Updated ( Thursday, 12 June 2008 )
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Beamlines 
