Computer simulation on spatial resolution of X-ray bright-field imaging by dynamical diffraction theory for a Laue-case crystal analyzer

作者：Suzuki Yoshifumi^*; Chikaura Yoshinori; Ando Masami

来源：Journal of Applied Physics, 2011, 110(8): 084902.

DOI：10.1063/1.3651144

Recently, dark-field imaging (DFI) and bright-field imaging (BFI) have been proposed and applied to visualize X-ray refraction effects yielded in biomedical objects. In order to clarify the spatial resolution due to a crystal analyzer in Laue geometry, a program based on the Takagi-Taupin equation was modified to be used for carrying out simulations to evaluate the spatial resolution of images coming into a Laue angular analyzer (LAA). The calculation was done with a perfect plane wave for diffraction wave-fields, which corresponded to BFI, under the conditions of 35 keV and a diffraction index 440 for a 2100 mu m thick LAA. As a result, the spatial resolution along the g-vector direction showed approximately 37.5 mu m. 126 mu m-thick LAA showed a spatial resolution better than 3.1 mu m under the conditions of 13.7 keV and a diffraction index 220.

• 出版日期2011-10-15