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$Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2$

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Achromatic Non-Interferometric Single Grating Neutron Dark-Field Imaging.

M Strobl^1,2, J Valsecchi³, R P Harti⁴

¹Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen, Switzerland. markus.strobl@psi.ch.

Scientific Reports

|December 25, 2019

Summary

This summary is machine-generated.

A novel neutron beam modulation technique allows for advanced imaging, enabling detailed structural analysis of materials. This method offers achromatic properties and flexibility, making it ideal for quantitative dark-field imaging at pulsed neutron sources.

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Area of Science:

Materials Science
Neutron Optics
Imaging Techniques

Background:

Interferometric methods are standard for phase and dark-field contrast imaging.
Existing techniques can be limited by chromatic aberrations and experimental parameter inflexibility.

Purpose of the Study:

To introduce a simple single grating beam modulation technique for neutron imaging.
To enable differential phase and dark-field contrast imaging with high neutron beam intensity.
To achieve spatially resolved structural correlation measurements.

Main Methods:

Utilizing a single grating for neutron beam modulation.
Implementing a technique analogous to interferometric methods.
Employing a macroscopic absorption mask for extended length scales.

Main Results:

Demonstrated a simple, achromatic beam modulation technique for neutron imaging.
Enabled quantitative dark-field contrast imaging in time-of-flight mode at pulsed neutron sources.
Achieved high-resolution structural correlation measurements on various materials.

Conclusions:

The developed technique offers a flexible and achromatic alternative to traditional interferometric methods.
It significantly expands the accessibility of quantitative dark-field imaging, particularly at pulsed neutron sources.
The method facilitates advanced microstructural analysis by combining scattering and real-space imaging.