VESPERS (Very Sensitive Elemental and Structural Probe Employing Radiation from a Synchrotron) beamline is a hard X-ray microprobe beamline dedicated to micro-diffraction and micro-fluorescence analysis. The table below gives an overview of the VESPERS beamline including the endstation capabilities.
| Status |
Operational - accepting proposals |
| Source |
Bending Magnet |
| Monochromator |
Double Crystal and Multilayer |
| Spectra Range |
6-30 keV |
| Resolution |
Pink, 10%, 1.6%, 0.01% |
| Spot Size |
2-4 μm x 2-4 μm |
| Microprobe |
| Laue X-ray Diffraction |
| X-ray Flurescence |
| X-ray Absorption Near Edge Structure |
| Differential Aperture Diffraction Microscopy |
| Multi-bandpass and Pink beam |
Laue diffraction and X-ray fluorescence spectroscopy are the principal techniques for structural and elemental analysis, respectively, on this beamline. The beamline has a capability to produce X-rays with several widely differing bandwidths, 0.01%, 1.6%, 10%, and fully polychromatic beam. A variable bandwidth will simplify the Laue diffraction analysis of crystals of varying degrees of symmetry and will provide optimum XRF excitation for many matrices. In addition, the availability of 0.01% bandpass allows the absorption edge of a particular element to be scanned, thereby permitting the chemical state of a particular element to be sensed.
VESPERS beamline uses a bending magnet source on port 07B2-1 at CLS. It is designed to have a two-branch capability which allows two branch lines to be operated independently while sharing one monochromator. Currently, only one branch is running . The figure shown above is a schematic layout of one branch of the beamline.
