Current Set-up, Analytical Capability and Selected Applications of the Hard X-Ray Microprobe at the D09B X-Ray Fluorescence Beamline of the LNLS

C. A. PÉREZ; S. MOREIRA; H. J. SÁNCHEZ; R. T. LOPES; M. E. VARELA

Frascati (Italia)

Congreso; IXCOM 2005; 2005

The hard x-ray microprobe station installed at the x-ray fluorescence beamline [1] of the LNLS currently uses two types of set-ups depending on the required spatial resolution of the experiment. One set-up consists of a set of precision crossed slits giving the possibility of generating microbeams sizes between 80 mm to 200 mm in both vertically and horizontally directions. It is often use for conventional chemical mapping with low spatial resolution and also to develop x-ray fluorescence microtomography experiments. A second set-up consists of a fine conical monocapillary able to condense the white beam down to an area of approximately 20 mm in diameter at 1 mm from the tip of the capillary. In this work a general description of the above set-ups is given. The analytical capability for trace elements detection using capillary optics was assessed by determining the detection limits from several certificated standards measurements. Some selected applications coming from earth, environmental and life sciences are also shown.