CLS-SM consists of an Apple II Elliptically Polarizing Undulator (EPU), a plane grating monochromator (PGM), two branch lines, and two microscopes:
Scanning Transmission X-ray Microscope (STXM)
X-ray Photoemission Electron Microscope (X-PEEM)
The CLS SM facility is now in full operation with a vibrant general user program. The beamline provides high brightness, well resolved photons from 130 - 2500 eV, to the STXM and PEEM end stations. Its source is an elliptically polarized undulator (EPU) which can rotate the direction of linear polarization continuously from -90° to +90° and provide fully circular (130 – 1000 eV) and elliptically (1000 – 2500 eV) polarized light for static and dynamic magnetism measurements via XMCD. STXM provides high quality imaging and spatially resolved spectroscopy with 30 nm spatial resolution. Wet and dry samples have been measured. Devices for tomography, in situ magnetic fields up to 5kG, and measuring samples under controlled humidity conditions are available. X-PEEM is a commercial X-ray photoemission electron microscope capable of better than 50 nm spatial resolution on appropriate samples. Currently it is configured in X-ray absorption mode which provides high sensitivity and a sampling depth of ~10 nm. There is a UHV preparation chamber attached to X-PEEM which includes several evaporation ports, a quartz crystal micro balance, ion sputtering and a LEED/Auger system.
New: X-ray Flourescence Spectromicroscopy in STXM:
The X-ray Fluorescence (XRF) Spectromicroscopy capability has been added recently in STXM. A new silicon drift detector (SDD) was successfully commissioned in the first week of February 2012 and is now available to general users. Figure below show the setup and results from the first sample tested, which is an environmental sample to determine the fate of Ni in a natural aqueous environment (water from the South Saskatchewan river, by the University).
X-ray fluorescence detector setup (left) and Nickel speciation and mapping using X-ray fluorescence spectromicroscopy in a river biofilm sample (Hitchcock et al.)
2011 Publication Highlight: Nature Communications, 2011, doi:10.1038/ncomms1376:
Brian J. Schultz, Christopher J. Patridge, Vincent Lee, Cherno Jaye, Patrick S. Lysaght, Casey Smith, Joel Barnett, Daniel A. Fischer, David Prendergast, Sarbajit Banerjee
2010 Publication Highlights: Scientifc Highlights from the Beamline in 2010
