Characterization of homemade x-ray polycapillaries

摘要

The possibilities of performing non-destructive elemental microanalysis with synchrotron radiation by means of homemade polycapillary optics are described. Using fiber glass technology, monolithic polycapillary half-lenses were made by drawing packages of glass capillaries at high temperature in a heating furnace. The performance of polycapillary half-lenses with different geometries was evaluated. A gold knife-edge scanned at the output of the lenses was used to determine the spot size at different distances. Measurements of photon flux impinging on the entrance end of the lenses and photon flux leaving the lenses were used to obtain the transmission efficiency. The polycapillary half-lens made in our laboratory was used in a series of XRF microanalysis tests using white beam. The overall efficiency of the system was studied by means of establishing detection limits for various elements in an organic sample. Copyright (C) 2008 John Wiley & Sons, Ltd.