Wavelength-independent constant period spin-echo modulated small angle neutron scattering

Sales, Morten; Plomp, J.; Habicht, K.; Tremsin, Anton S.; Bouwman, Wim G.; Ströbl, Markus

doi:10.1063/1.4954727

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…Today grating interferometers for imaging are available at many leading instruments at neutron sources around the world [5,15,[23][24][25][26]. Numerous successful studies [9][10][11][12][13][14][15][16][17][18][19][20][21] triggered continuous developments with regards to varying implementations of analogue techniques [10,[25][26][27][28][29][30]. Advances targeted mainly efficiency, complexity and assessable correlation length scales.…”

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confidence: 99%

“…It operates in full analogy to Talbot Lau grating interferometric imaging but builds on the quantum spin phase and interference of the two spin states of the neutron wave function. The advantage of the this method is access to the nano-scale, full remote control of the modulation as well as its suitability for the most efficient time-of-flight wavelength dispersive measurement approach with neutrons at pulsed spallation sources [28,29]. Disadvantages are the sophisticated and elaborate set-up and technological barriers to assess the micro-scale, without excessive sample to detector distances.…”

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confidence: 99%

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Achromatic Non-Interferometric Single Grating Neutron Dark-Field Imaging

Ströbl

Valsecchi

Harti

et al. 2019

Sci Rep

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We demonstrate a simple single grating beam modulation technique, which enables the use of a highly intense neutron beam for differential phase and dark-field contrast imaging and thus spatially resolved structural correlation measurements in full analogy to interferometric methods. In contrast to these interferometric approaches our method is intrinsically achromatic and provides unprecedented flexibility in the choice of experimental parameters. In particular the method enables straight forward application of quantitative dark-field contrast imaging in time-of-flight mode at pulsed neutron sources. Utilizing merely a macroscopic absorption mask unparalleled length scales become accessible. We present results of quantitative dark-field contrast imaging combining microstructural small angle scattering analyses with real space imaging for a variety of materials.

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confidence: 99%

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confidence: 99%

Achromatic Non-Interferometric Single Grating Neutron Dark-Field Imaging

Ströbl

Valsecchi

Harti

et al. 2019

Sci Rep

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“…In a time-of-flight experiment this would require ramping of the magnetic fields synchronized with the source pulses. The feasibility of such a technique has been demonstrated already as well [58]. It has to be noted however, that this impacts the accessible range as the wavelength dependence of the probed correlation length changes from wavelength square to a linear dependence, hence a significantly smaller range for the same wavelength range.…”

Section: Progress In Spin-echo Modulated Dfimentioning

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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“…The similar SEMSANS method allows to record the small‐angle scattering in parallel with 2D imaging. [ 49,50 ]…”

Section: Introductionmentioning

confidence: 99%

Neutron Spin‐Echo Instrumentation for Magnetic Scattering

Keller

Trepka

Habicht

et al. 2021

Physica Status Solidi (b)

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Neutron spin‐echo (NSE) spectroscopy is a powerful tool for the study of magnon lifetimes and magnetic critical dynamics. The unique property of NSE is the energy resolution in the μeV range. The first NSE spectrometers were optimized for quasielastic scattering at small momentum transfers and delivered substantial contributions to the understanding of critical dynamics in ferromagnets and dynamic correlations in spin glasses. The subsequent resonant NSE (NRSE) technique extends the parameter range toward large momentum and energy transfers and permits to measure magnon lifetimes across the Brillouin zone. NRSE also comprises the Larmor diffraction (LD) mode with a resolution for lattice spacings and their variance Δdhkl/dhkl of order 10−6. LD proves useful to determine magnetostriction effects, small lattice distortions related to magnetic ordering, mosaic spread in crystals, and the size distribution of antiferromagnetic domains. Both typical experiments and the related technical innovation are reviewed and an outlook on future developments is given.

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Wavelength-independent constant period spin-echo modulated small angle neutron scattering

Cited by 4 publications

References 15 publications

Achromatic Non-Interferometric Single Grating Neutron Dark-Field Imaging

Achromatic Non-Interferometric Single Grating Neutron Dark-Field Imaging

Small Angle Scattering in Neutron Imaging—A Review

Neutron Spin‐Echo Instrumentation for Magnetic Scattering

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