BL-4A Trace element analysis/X-ray microbeam station

Contact person:Yasuhiro Niwa
Yoshio Takahashi (Univ. Tokyo)


This station is mainly used for X-ray fluorescence analysis with X-ray (semi-) microbeam including ultra trace element analysis, chemical state analysis, and elemental and chemical state mapping. Since synchrotron X-ray fluorescence analysis is highly sensitive to trace elements and has non-destructive nature, it is suitable for the analysis of the biological, biomedical, environmental and geological samples. It is beneficial for materials science as well.

A constant exit double crystal monochromator is equipped for the experiments with monochromatic X-rays. The experimental hutch is located 13 m from the source point.



Schematic view of the beamline

2. Area of Research

X-ray fluorescence analysis with X-ray (semi-)microbeam
trace element analysis / chemical state analysis (XANES) / elemental (chemical state) mapping /

3. Light Source & X-rays at sample

Light source: Bending magnet (σ:0.247mm(H) ×0.088 mm (V))
Energy range Monochromatic X-rays. 6-18 keV
Energy resolution(ΔE/E) 10-4(monochromatic X-rays)
Beam size

Microbeam, 5μm × 5μm with KB optics
Semi-microbeam 30μmφwith a poly-capillary

Photon flux monochromatic beam(max) 1010 photons/s

4. Facilities in Experimental Station

5. Main features of X-ray fluorescence analysis

1) Micorbeam analysis

2) Poly-Capillary analysis

X-ray microbeam system

6. References

1) A.Iida and T.Noma: Nucl. Instrum. and Methods, B82(1993)129.

Last modified: 2014-08-25