A new method for polychromatic X-ray μLaue diffraction on a Cu pillar using an energy-dispersive pn-junction charge-coupled device

μLaue diffraction with a polychromatic X-ray beam can be used to measure strain fields and crystal orientations of micro crystals. The hydrostatic strain tensor can be obtained once the energy profile of the reflections is measured. However, this remains a challenge both on the time scale and reprod...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11), p.113901-113901
Main Authors: Abboud, A, Kirchlechner, C, Send, S, Micha, J S, Ulrich, O, Pashniak, N, Strüder, L, Keckes, J, Pietsch, U
Format: Article
Language:English
Subjects:
CHARGE-COUPLED DEVICES
Crystal structure
DIFFRACTION
Dispersion
Energy
ENERGY SPECTRA
Filtration
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
KEV RANGE 10-100
MONOCRYSTALS
Morphology
Reproducibility
Scientific apparatus & instruments
SEMICONDUCTOR JUNCTIONS
Semiconductors
SYNCHROTRONS
Tensors
X RADIATION
X ray spectra
X-ray diffraction
X-rays
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Summary:μLaue diffraction with a polychromatic X-ray beam can be used to measure strain fields and crystal orientations of micro crystals. The hydrostatic strain tensor can be obtained once the energy profile of the reflections is measured. However, this remains a challenge both on the time scale and reproducibility of the beam position on the sample. In this review, we present a new approach to obtain the spatial and energy profiles of Laue spots by using a pn-junction charge-coupled device, an energy-dispersive area detector providing 3D resolution of incident X-rays. The morphology and energetic structure of various Bragg peaks from a single crystalline Cu micro-cantilever used as a test system were simultaneously acquired. The method facilitates the determination of the Laue spots' energy spectra without filtering the white X-ray beam. The synchrotron experiment was performed at the BM32 beamline of ESRF using polychromatic X-rays in the energy range between 5 and 25 keV and a beam size of 0.5 μm × 0.5 μm. The feasibility test on the well known system demonstrates the capabilities of the approach and introduces the "3D detector method" as a promising tool for material investigations to separate bending and strain for technical materials.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4900482