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short communications
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 , the lateral resolution of this diffractometer is 49.7 49.9 at 7.5 keV, and its depth resolution is 48.1 at 8.0 keV. The total resolution of this diffractometer in is 6.5% at 6.4 keV and .