Results 31 to 40 of about 89,505 (296)
Neutron Bragg Edge Tomography for Phase Mapping
Physics Procedia, 2015 AbstractThis paper describes non-destructive three-dimensional (3D) mapping of crystallographic phase distributions within the bulk (centimeter range) of samples with micrometer-scale resolution. The technique leverages diffraction contrast due to Bragg scattering and the large penetration power of neutrons through high-atomic-number-element-based ...
Woracek, Robin +6 more
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Bragg‐Edge Transmission as an Additional Tool for StrainMeasurements [PDF]
Texture, Stress, and Microstructure, 1999 Solid state information from coherent neutron scattering can be extracted from transmission experiments on polycrystalline materials. The transmission technique has been applied to dynamic structural and phase change investigations and will be developed to cover the fields of strain mapping and structural tomography.
Hans Georg Priesmeyer +5 more
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Room temperature continuous wave operation of single-mode, edge-emitting photonic crystal Bragg lasers [PDF]
, 2008 We report the first room temperature CW operation of two dimensional single-mode edge-emitting photonic crystal Bragg lasers. Single-mode lasing with single-lobed, diffraction limited far-fields is obtained for 100μm wide and 550μm long on-chip devices ...
DeRose, Guy A. +4 more
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Low-Cost Interrogation Technique for Dynamic Measurements with FBG-Based Devices
Sensors, 2017 Fiber Bragg gratings are widely used optical fiber sensors for measuring temperature and/or mechanical strain. Nevertheless, the high cost of the interrogation systems is the most important drawback for their large commercial application.
Camilo A. R. Díaz +9 more
doaj +1 more source
Applied Sciences, 2019 A multiple quantum-well semiconductor saturable absorber mirror (MQW-SESAM) structure has been investigated by femtosecond pump-probe laser spectroscopy at a central wavelength of around 1050 nm.
Changxiu Li +4 more
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Neutron Transmission Strain Measurements on IMAT: Residual Strain Mapping in an AlSiCp Metal Matrix Composite [PDF]
, 2018 Neutron transmission strain measurements were performed for the first time at the IMAT beamline, ISIS, UK, in order to demonstrate the capability and measure the accuracy of the new instrument.
Fitzpatrick, Michael +3 more
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Finite element approach to Bragg edge neutron strain tomography
ANZIAM Journal, 2020 A number of techniques and applications in neutron imaging that exploit wavelength resolved measurements have been developed recently. One such technique, known as energy resolved neutron imaging, receives ample attention because of its capability to not only visualise but to also quantify physical attributes with spatial resolution.
Riya Aggarwal +3 more
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Journal of Materials Research and Technology, 2022 Spatially resolved studies of crystalline structures, e.g. lattice spacings, are enabled by recording the transmitted spectra in neutron Bragg edge imaging. The recorded signals are, however, a result of through-thickness averaging of the probed specimen
Shieren Sumarli +7 more
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Slow light with flat or offset band edges in multi-mode fiber with two gratings
, 2007 We consider mode coupling in multimode optical fibers using either two Bragg gratings or a Bragg grating and a long-period grating. We show that the magnitude of the band edge curvature can be controlled leading to a flat, quartic band-edge or to two ...
de Sterke, C. Martijn +3 more
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Journal of Imaging, 2017 Current status of Bragg-edge/dip neutron transmission analysis/imaging methods is presented. The method can visualize real-space distributions of bulk crystallographic information in a crystalline material over a large area (~10 cm) with high spatial ...
Hirotaka Sato
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