Results 251 to 260 of about 89,505 (296)

Bragg-edge Imaging with Neutrons

Materials Testing, 2008
Abstract Cold neutrons have a wavelength that is in the same range as the dhkl spaces for polycrystalline metal materials. Therefore imaging of polycrystalline materials with monochromatic cold neutrons provides a unique contrast due to coherent Bragg scattering. Here, we present investigations of metallic materials with energy-selective
Nikolay Kardjilov, André Hilger, Ingo Manke, Francisco Garcia-Moreno, John Banhart   +4 more
openaire   +1 more source

Image edge enhancement by Bragg diffraction

Optics Communications, 1996
We present a novel and simple optical image processing system for edge enhancement. The system consists of a single imaging lens and an acousto-optic modulator. Image edge enhancement is achieved by Bragg diffraction. Experimental and computer simulation results are given.
Xia, Jiangang, Dunn, Derrek B., Poon, Ting-Chung, Banerjee, Partha P.   +3 more
openaire   +2 more sources

Coupling of Edge States and Topological Bragg Solitons

Physical Review Letters, 2019
The existence of the edge states at the interface between two media with different topological properties is protected by symmetry, which makes such states robust against structural defects or disorder. We show that, if a system supports more than one topological edge state at the interface, even a weak periodic deformation may scatter one edge state ...
Weifeng, Zhang, Xianfeng, Chen, Yaroslav V, Kartashov, Vladimir V, Konotop, Fangwei, Ye   +4 more
openaire   +2 more sources

PiBrED—A novel bragg edge detector for neutrons

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011
We present a single pixel prototype of a pixelated Bragg edge detector for neutron transmission measurements. The optical signal coming from a scintillator is collected by an optical fiber and is detected by an avalanche photodiode. A fast, Field Programmable Gate Array based, readout allows to obtain transmission spectra within reasonable acquisition ...
V. Finocchiaro a, b, F. Aliotta b, D. Tresoldi b, R.C. Ponterio b, C.S. Vasi b, G. Salvato b, n   +7 more
openaire   +1 more source

Neutron Bragg-edge mapping of weld seams

International Journal of Materials Research, 2012
AbstractCold neutrons have a wavelength that is in the same range as the lattice spacings of most polycrystalline metallic materials. Imaging of such materials with monochromatic cold neutrons of different wavelengths provides a unique contrast due to coherent Bragg scattering.
Nikolay Kardjilov, Ingo Manke, André Hilger, Scott Williams, Markus Strobl, Robin Woracek, Mirko Boin, Eberhard Lehmann, Dayakar Penumadu, John Banhart   +9 more
openaire   +1 more source

First neutron Bragg-edge imaging experimental results at CSNS*

Chinese Physics B, 2021
The neutron Bragg-edge imaging is expected to be a new non-destructive energy-resolved neutron imaging technique for quantitatively two-dimensional or three-dimensional visualizing crystallographic information in a bulk material, which could be benefited from pulsed neutron source. Here we build a Bragg-edge imaging system on the General Purpose Powder
Jie Chen, Zhijian Tan, Weiqiang Liu, Sihao Deng, Shengxiang Wang, Liyi Wang, Haibiao Zheng, Huaile Lu, Feiran Shen, Jiazheng Hao, Xiaojuan Zhou, Jianrong Zhou, Zhijia Sun, Lunhua He, Tianjiao Liang   +14 more
openaire   +1 more source