Ukrainian Journal of Physical Optics 

Volume 21, Issue 3, 2020
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Reconstruction of spatial distribution of strains in crystals using the energy spectrum of X-ray Moiré patterns

Fodchuk I. M., Balovsyak S. V., Novikov S. M., Yanchuk I. V. and Romankevych V. F.

Yuriy Fedkovych Chernivtsi National University, 2 Kotsyubinsky Str., 58002 Chernivtsi, Ukraine ifodchuk@ukr.net

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Abstract. We develop a new approach to the analysis of experimental Moiré patterns obtained with LLL-interferometer. Radial distributions of the energy spectra of Moiré patterns reveal different sensitivities to the sources of local mechanical strains in the low- and high-frequency ranges. This offers new possibilities for determining the magnitudes of total mechanical strains and reconstructing their spatial distributions in crystals.

Keywords: ZLLL-interferometers, Moiré patterns, strain fields, frequencies of radial distributions, Fourier energy spectra

UDC: 548.4-548.734
Ukr. J. Phys. Opt. 21 141-151
doi: 10.3116/16091833/21/3/141/2020
Received: 06.03.2020

Анотація.  Розвинуто новий підхід до аналізу експериментальних муарових картин, одержаних за допомогою LLL-інтерферометра. Радіальні розподіли енергетичних спектрів муарових зображень виявляють різну чутливість до джерел локальних механічних напружень у низькочастотному та високочастотному діапазонах. Це пропонує нові можливості для визначення загальної величини механічних деформацій та реконструкції їхнього просторового розподілу в кристалах.
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