Journal of Applied Crystallography

Volume 40, Part 6 (December 2007)

short communications

J. Appl. Cryst. (2007). 40, 1169-1173 [ doi:10.1107/S0021889807048285 ]

Characterization of polycapillary X-ray lens for application in confocal three-dimensional energy-dispersive micro X-ray diffraction experiments

T. Sun, M. Zhang, X. Ding, Z. Liu, X. Lin and H. Liu

Abstract: A confocal technology based on polycapillary X-ray optics is proposed to perform three-dimensional energy-dispersive micro X-ray diffraction. A three-dimensional energy-dispersive micro X-ray diffractometer based on a polycapillary focusing X-ray lens (PFXRL) in the excitation channel and a polycapillary parallel X-ray lens (PPXRL) in the detection channel has been designed. At $2\theta = 90^ \circ$ , the lateral resolution $l_X \times l_Y$ of this diffractometer is 49.7 $\times$ 49.9 $\rm \micro m$ at 7.5 keV, and its depth resolution is 48.1 $\rm \micro m$ at 8.0 keV. The total resolution of this diffractometer in $\Delta d/d$ is 6.5% at 6.4 keV and $2\theta = 140.2^ \circ$ .

Keywords: polycapillary X-ray optics; three-dimensional energy-dispersive micro X-ray diffraction.