Development of the grating phase neutron interferometer at a monochromatic beam line

Lee, Seung Wook; Hussey, Daniel S.; Jacobson, David L.; Sim, Cheul Muu; Arif, Muhammad

doi:10.1016/j.nima.2009.01.225

Cited by 31 publications

(13 citation statements)

References 5 publications

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“…Bulk domain structures have been visualized in two [18][19][20] and even three dimensions [21]. The NGI technique has successfully been established at different neutron facilities around the world as a routine method in neutron imaging [22][23][24][25]. In this article, we present the in situ visualization of the formation and growth of volume and supplementary magnetic domain structures in an HPSL under the influence of externally applied magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Response of the Bulk and Supplementary Magnetic Domain Structure in High-Permeability Steel Laminations VisualizedIn Situby Neutron Dark-Field Imaging

et al. 2016

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Industrial transformer cores are composed of stacked high-permeability steel laminations (HPSLs). The performance and degree of efficiency of transformers are directly determined by the magnetic properties of each HPSL. In this article, we show how the neutron dark-field image (DFI) allows for the in situ visualization of the locally resolved response of the bulk and supplementary magnetic domain structures in HPSLs under the influence of externally applied magnetic fields. In particular, we investigate the domain formation and growth along the initial magnetization curve up to the saturated state. For decreasing field, we visualize the recurrence of the hysteretic domain structure down to the remanent state. Additionally, the DFI allows us to derive a correlation between the grain orientation and the corresponding volume and supplementary domain structure. Furthermore, we visualize the influence of the insulation coating, introducing desired tensile stresses on the domain structures. To compare our DFI findings to traditional methods, we perform complementary surface-sensitive magneto-optical Kerr-microscopy investigations.

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Section: Introductionmentioning

confidence: 99%

Magnetization Response of the Bulk and Supplementary Magnetic Domain Structure in High-Permeability Steel Laminations VisualizedIn Situby Neutron Dark-Field Imaging

et al. 2016

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“…To realize such potential there is still a lot of room for improvements and developments pushing the current limitations. For grating-based methods this is mainly done at conventional continuous source imaging instruments [17,37,46,[59][60][61], but finds its way also to pulsed sources like JPARC and ISIS with a view on their pioneering dedicated ToF imaging instrumentation [62][63][64][65][66]. The spin-echo technique has so far been explored at test beamlines in Berlin [55] and Delft [34], but also here capabilities become available at the named spallation sources.…”

Section: Discussionmentioning

confidence: 99%

Small Angle Scattering in Neutron Imaging—A Review

et al. 2017

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Abstract:Conventional neutron imaging utilizes the beam attenuation caused by scattering and absorption through the materials constituting an object in order to investigate its macroscopic inner structure. Small angle scattering has basically no impact on such images under the geometrical conditions applied. Nevertheless, in recent years different experimental methods have been developed in neutron imaging, which enable to not only generate contrast based on neutrons scattered to very small angles, but to map and quantify small angle scattering with the spatial resolution of neutron imaging. This enables neutron imaging to access length scales which are not directly resolved in real space and to investigate bulk structures and processes spanning multiple length scales from centimeters to tens of nanometers.

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“…Some of these limitations are overcome by Talbot-Lau grating interferometers which work in the full-field of a cold neutron beam, with relaxed requirements for wavelength acceptance. [18][19][20] Talbot-Lau grating interferometers have a peak visibility for the design wavelength and have the negative aspect of needing high aspect ratio neutron transmission gratings, which are a fabrication challenge.…”

Section: Introductionmentioning

confidence: 99%

Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility

et al. 2019

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Development of the grating phase neutron interferometer at a monochromatic beam line

Cited by 31 publications

References 5 publications

Magnetization Response of the Bulk and Supplementary Magnetic Domain Structure in High-Permeability Steel Laminations VisualizedIn Situby Neutron Dark-Field Imaging

Magnetization Response of the Bulk and Supplementary Magnetic Domain Structure in High-Permeability Steel Laminations VisualizedIn Situby Neutron Dark-Field Imaging

Small Angle Scattering in Neutron Imaging—A Review

Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility

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