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Experimentally obtained and computer-simulated X-ray asymmetric eight-beam pinhole topographs for a silicon crystal.


ABSTRACT: In this study, experimentally obtained eight-beam pinhole topographs for a silicon crystal using synchrotron X-rays were compared with computer-simulated images, and were found to be in good agreement. The experiment was performed with an asymmetric all-Laue geometry. However, the X-rays exited from both the bottom and side surfaces of the crystal. The simulations were performed using two different approaches: one was the integration of the n-beam Takagi-Taupin equation, and the second was the fast Fourier transformation of the X-ray amplitudes obtained by solving the eigenvalue problem of the n-beam Ewald-Laue theory as reported by Kohn & Khikhlukha [Acta Cryst. (2016), A72, 349-356] and Kohn [Acta Cryst. (2017), A73, 30-38].

SUBMITTER: Okitsu K 

PROVIDER: S-EPMC6492489 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Experimentally obtained and computer-simulated X-ray asymmetric eight-beam pinhole topographs for a silicon crystal.

Okitsu Kouhei K   Imai Yasuhiko Y   Yoda Yoshitaka Y   Ueji Yoshinori Y  

Acta crystallographica. Section A, Foundations and advances 20190430 Pt 3


In this study, experimentally obtained eight-beam pinhole topographs for a silicon crystal using synchrotron X-rays were compared with computer-simulated images, and were found to be in good agreement. The experiment was performed with an asymmetric all-Laue geometry. However, the X-rays exited from both the bottom and side surfaces of the crystal. The simulations were performed using two different approaches: one was the integration of the n-beam Takagi-Taupin equation, and the second was the f  ...[more]

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