The macro resolution mode is capable of rapid XRF imaging of relatively large samples. In addition, subregions of interest can be scanned with higher spatial resolution without changing the setup. A series of pinholes, which determines the beam size, are on a motorized stage and a beam size of interest (ranging between 20 to 150 μm) can be quickly selected during the same experiment. There are two stage-configuration available depending on the sample thickness. The 45 degrees stage-configuration with respect to the incident beam are generally set up for cross-sections varying from a few μm to a couple of hundreds of μm. For thicker samples with a thickness of mm range, the 90 degrees stage-configuration is used.
- Four beam sizes are available between 20 and 150 μm defined by Pt or W apertures
- Bi-directional fly scanning up to 20 ms dwell time
- Two stage-configurations, 90 and 45 degrees, with respect to the incoming beam
- Camera for scan setup/sample visualization
- Samples under ambient air
The following fluxes are available with Pt aperture at 10 keV (5th harmonics). A similar flux can be obtained with the W aperture as well.
- 20 μm: 0.6 x 10^11 ph/s/100 mA
- 50 μm: 3.5 x 10^11 ph/s/100 mA
- 100 μm: 0.9 x 10^12 ph/s/100 mA
- 150 μm: 1.4 x 10^12 ph/s/100 mA
The stage configuration can be changed depending on the thickness of the sample.
Stage configuration at 90 degree
- The macro stage at 90 degrees orientation and the 4E Vortex detector at 45 degrees to the incident beam.
Stage configuration at 45 degrees
- The macro stage at 45 degrees orientation and the 4E Vortex detector at 90 degrees to the incident beam.