Technical Information - SXR
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- AS Spectroscopy Wiki
The Soft X-Ray beamline is spanning the approximate energy range of 90eV to 2500eV with a resolving power of the monochromator of 10000. The AppleII elliptically polarised undulator can supply linear vertical, linear horizontal as well as left and right circular polarised light.
The soft x-ray beamline consists of two branchlines; The Imaging branchline and The Spectroscopy branchline. Since both branchlines have a common undulator and monochromator only one branch can operate at any given time. The spectroscopy branchline is set up primarily for X-ray Absorption Spectroscopy (XAS) of low atomic number elements, X-ray Photoelectron Spectroscopy (XPS) and Angle-Resolved Photoelectron Spectroscopy (ARPES) all of which are performed under Ultra-High Vacuum (UHV) conditions. The Imaging branchline will in the near future host a X-ray nanolithography facility which is currently being designed and constructed at LTU.
The Soft X-ray beamline currently features 2 endstations; a Prevac XAS/XPS endstation and an ARPES endstation with a toroidal geometry designed detector, which both take turns at being attached to the spectroscopy branch. An experimental chamber has been added upstream on the Imaging branch. This inline system is a high throughput Near Edge X-ray Absorption Spectroscopy (ht-NEXAFS) chamber, which allow for measurement of samples at a pressure of 10-6 mbar instead of 10-10 mbar, the UHV pressure needed to measure samples in the Prevac or Toroidal endstations.
For XAS measurements, the energy range of the beamline allow access to a significant amount of elements in the periodic table (see below) where blue indicate accessible K edges, red indicate accessible L edges and yellow indicate accessible M edges. Elements/edges not highlighted in the periodic table might still be possible to scan – please contact us for further discussions
For more information about the technical information of the Soft X-Ray beamline please see the SXR page on the Australian Synchrotron website here