scholarly journals Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study

2022 ◽  
Vol 12 (2) ◽  
pp. 833
Author(s):  
Youngju Kim ◽  
Jacopo Valsecchi ◽  
Ohsung Oh ◽  
Jongyul Kim ◽  
Seung Wook Lee ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Structural Features ◽  
Dark Field ◽  
Global Market ◽  
Milk Products ◽  
Dark Field Imaging ◽  
Fat Globules ◽  
Field Imaging

Scattering studies of milk and milk products, which are highly relevant food products on the global market, are often utilized and reported in literature to investigate and understand the subtle microscopic structural differences between dairy samples. These structural features determine the physical properties and ultimately the texture of milk products and, thus, also influence the consumer’s experience. Small-angle neutron scattering is a prominent example, which enables observations of length scales, which convey proteins and fat globules in food-grade milk. In addition, deuteration enables contrast variations between the constituents of dairy products. In this study, we investigate the potential of probing small-angle neutron scattering from milk samples through quantitative neutron dark-field imaging using grating interferometry, to establish the feasibility of studying, in particular, fat globules and milk gel structures with this spatially resolved scattering technique.

Structural features of films based on star-shaped fullerene-containing polystyrenes: Small-angle neutron-scattering study

2016 ◽  
Vol 58 (5) ◽  
pp. 697-709 ◽  
Author(s):  
V. T. Lebedev ◽  
Yu. V. Kul’velis ◽  
D. N. Orlova ◽  
V. V. Shamanin ◽  
L. V. Vinogradova
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Structural Features ◽  
Scattering Study ◽  
Neutron Scattering Study

scholarly journals Characterization of oriented microstructures through anisotropic small-angle scattering by 2D neutron dark-field imaging

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Jacopo Valsecchi ◽  
Markus Strobl ◽  
Ralph Patrick Harti ◽  
Chiara Carminati ◽  
Pavel Trtik ◽  
...  
Keyword(s):  
Small Angle ◽  
Dark Field ◽  
Small Angle Scattering ◽  
Dark Field Imaging ◽  
Angle Scattering ◽  
Field Imaging

Structural Features of Molecular-Colloidal Solutions of C60Fullerenes in Water by Small-Angle Neutron Scattering

Langmuir ◽  
2004 ◽  
Vol 20 (11) ◽  
pp. 4363-4368 ◽  
Author(s):  
M. V. Avdeev ◽  
A. A. Khokhryakov ◽  
T. V. Tropin ◽  
G. V. Andrievsky ◽  
V. K. Klochkov ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Structural Features ◽  
Colloidal Solutions

Structural Features of Micelles of Zwitterionic Dodecyl-phosphocholine (C12PC) Surfactants Studied by Small-Angle Neutron Scattering

Langmuir ◽  
2015 ◽  
Vol 31 (36) ◽  
pp. 9781-9789 ◽  
Author(s):  
Elias Pambou ◽  
John Crewe ◽  
Mohammed Yaseen ◽  
Faheem N. Padia ◽  
Sarah Rogers ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Structural Features

scholarly journals Quantitative analysis of speckle-based X-ray dark-field imaging using numerical wave-optics simulations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sebastian Meyer ◽  
Serena Z. Shi ◽  
Nadav Shapira ◽  
Andrew D. A. Maidment ◽  
Peter B. Noël
Keyword(s):  
Small Angle ◽  
Speckle Pattern ◽  
Random Phase ◽  
Dark Field ◽  
Wave Optics ◽  
X Ray ◽  
Dark Field Imaging ◽  
X Ray Imaging ◽  
Sample Structure ◽  
Field Imaging

AbstractThe dark-field signal measures the small-angle scattering strength and provides complementary diagnostic information. This is of particular interest for lung imaging due to the pronounced small-angle scatter from the alveolar microstructure. However, most dark-field imaging techniques are relatively complex, dose-inefficient, and require sophisticated optics and highly coherent X-ray sources. Speckle-based imaging promises to overcome these limitations due to its simple and versatile setup, only requiring the addition of a random phase modulator to conventional X-ray equipment. We investigated quantitatively the influence of sample structure, setup geometry, and source energy on the dark-field signal in speckle-based X-ray imaging with wave-optics simulations for ensembles of micro-spheres. We show that the dark-field signal is accurately predicted via a model originally derived for grating interferometry when using the mean frequency of the speckle pattern power spectral density as the characteristic speckle size. The size directly reflects the correlation length of the diffuser surface and did not change with energy or propagation distance within the near-field. The dark-field signal had a distinct dependence on sample structure and setup geometry but was also affected by beam hardening-induced modifications of the visibility spectrum. This study quantitatively demonstrates the behavior of the dark-field signal in speckle-based X-ray imaging.

Neutron imaging using a conventional small-angle neutron scattering instrument

2016 ◽  
Vol 49 (3) ◽  
pp. 736-742 ◽  
Author(s):  
C. D. Dewhurst ◽  
I. Grillo
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Dark Field ◽  
Industrial Applications ◽  
Neutron Imaging ◽  
Scattering Data ◽  
Radiographic Images ◽  
Transmitted Beam ◽  
Area Of Interest

Neutron imaging has enjoyed a flurry of activity and application in recent years. The construction of dedicated beamlines at various neutron sources has demonstrated the significant interest among the science and engineering communities, with particular relevance to industrial applications, the nondestructive testing of components and imaging of precious archaeological artefacts. Here two methods are demonstrated of how neutron imaging can be performed using a conventional small-angle neutron scattering (SANS) instrument, such as D33 at the Institut Laue–Langevin, with spatial resolutions down to about 100 µm. The first is a magnified imaging technique from a quasi-point-like source with the magnified image recorded on the usual low-resolution SANS detector. The second method uses a fine beam in a raster-scan measurement over the area of interest. Images can be reconstructed either using the transmitted beam, as in conventional radiographic imaging, or from scattering data, giving access to transmission radiographic images as well as the dark-field or scattering contrasts and phase-contrast images.

Detection of a point defect in a silicon single crystal by high-resolution TEM

1995 ◽  
Vol 53 ◽  
pp. 466-467
Author(s):  
M. Awaji
Keyword(s):  
High Resolution ◽  
Single Crystal ◽  
Point Defect ◽  
Point Defects ◽  
Noise Level ◽  
Dark Field ◽  
Silicon Single Crystal ◽  
High Resolution Image ◽  
Dark Field Imaging ◽  
Field Imaging

It is necessary to improve the resolution, brightness and signal-to-noise ratio(s/n) for the detection and identification of point defects in crystals. In order to observe point defects, multi-beam dark-field imaging is one of the useful methods. Though this method can improve resolution and brightness compared with dark-field imaging by diffuse scattering, the problem of s/n still exists. In order to improve the exposure time due to the low intensity of the dark-field image and the low resolution, we discuss in this paper the bright-field high-resolution image and the corresponding subtracted image with reference to a changing noise level, and examine the possibility for in-situ observation, identification and detection of the movement of a point defect produced in the early stage of damage process by high energy electron bombardment.The high-resolution image contrast of a silicon single crystal in the [10] orientation containing a triple divacancy cluster is calculated using the Cowley-Moodie dynamical theory and for a changing gaussian noise level. This divacancy model was deduced from experimental results obtained by electron spin resonance. The calculation condition was for the lMeV Berkeley ARM operated at 800KeV.

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