2 November 2000 Recent advances in x-ray source/optic integration
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Abstract
Close coupling of microfocus x-ray sources and polycapillary collimating optics allows for large collecting angle of the optics for small, parallel beam x-ray diffraction applications. Two polycapillary collimating optics were designed and fabricated for use with a microfocus x-ray tube that has a small spot and short spot-to-BE-window distance (2.2 mm). Both optics generated a quasi-parallel x-ray beam of 1.5 mm in diameter. The x-ray intensity obtained from the Cu-anode source was 1.9 X 109 cps (Cu K(alpha) ) at 40 kV and 60 W, and the beam divergence was measured to be 2.3 mrad. The intensity obtained from the Mo-anode source was 1.3 X 108 cps (Mo K(alpha) ) at 50 kV and 40 W, and the beam divergence was 1.6 mrad. These are equivalent to what one could achieved with a 5.4 kW Cu source and a 1.3 kW Mo source, respectively, when using conventional pinhole collimators. The approaches to achieve small beam divergence using polycapillary optics are discussed.
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Scott Snyder, Scott Snyder, Christopher K. Frank, Christopher K. Frank, Dennis L. Harris, Dennis L. Harris, Ning Gao, Ning Gao, } "Recent advances in x-ray source/optic integration", Proc. SPIE 4144, Advances in Laboratory-based X-Ray Sources and Optics, (2 November 2000); doi: 10.1117/12.405884; https://doi.org/10.1117/12.405884
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