Confocal three-dimensional energy-dispersive micro x-ray diffraction with polycapillary optic

PÉREZ R. D.; SÁNCHEZ H.J.; SOSA, C.; PÉREZ C. A.; SBARATO, V.

Campinas

Otro; Turno de medición; 2010

ABTLus

Polycapillary lenses contain a huge number of bent glass capillaries. The diverging radiation from a spot like source is captured in the capillaries and transported along them in any desired direction, as parallel beam or focus. The possibility to effectively focus radiation in an energy range from 2 to 40 keV allows realization of compact portable micro-x-ray analytical devices. Along with these optics other important impetus came from the development of detectors, such as silicon drift detectors and PIN diodes using Peltier cooling elements. In material analysis energy dispersive x-ray diffractometry is a well known method that does not need a precision goniometer. The continuous spectrum of the synchrotron radiation creates Laue diffraction peaks that originate from different crystallographic planes according to Bragg?s condition. In this work confocal three-dimensional energy-dispersive micro x-ray diffraction was implemented using polycapillary optic. We used half lenses manufactured in our laboratory which were characterized in previous research projects (D09B-XRF# 5744/06 and D09B-XRF # 7051/07). The lenses have low divergence allowing obtaining a good angular resolution.