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使用样品对基于箔片的自旋回波（调制）小角中子散射进行模拟。 （原句表述不太完整，翻译可能会稍显生硬，仅供参考）

Simulations of foil-based spin-echo (modulated) small-angle neutron scattering with a sample using .

作者信息

Bouwman Wim G, Knudsen Erik B, Udby Linda, Willendrup Peter

机构信息

Delft University of Technology, The Netherlands.

Technical University of Denmark, Denmark.

出版信息

J Appl Crystallogr. 2021 Feb 1;54(Pt 1):195-202. doi: 10.1107/S1600576720015496.

DOI:10.1107/S1600576720015496
PMID:33833647
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7941320/
Abstract

For the further development of spin-echo techniques to label elastic scattering it is necessary to perform simulations of the Larmor precession of neutron spins in a magnetic field. The details of some of these techniques as implemented at the reactor in Delft are simulated. First, the workings of the magnetized foil flipper are simulated. A full virtual spin-echo small-angle neutron scattering instrument is built and tested without and with a realistic scattering sample. It is essential for these simulations to have a simulated sample that also describes the transmitted beam of unscattered neutrons, which usually is not implemented for the simulation of conventional small-angle neutron scattering (SANS) instruments. Finally, the workings of a spin-echo modulated small-angle neutron scattering (SEMSANS) instrument are simulated. The simulations are in good agreement with theory and experiments. This setup can be extended to include realistic magnetic field distributions to fully predict the features of future Larmor labelling elastic-scattering instruments. Configurations can now be simulated for more complicated combinations of SANS with SEMSANS.

摘要

为了进一步发展自旋回波技术以标记弹性散射，有必要对中子自旋在磁场中的拉莫尔进动进行模拟。对代尔夫特反应堆所采用的其中一些技术细节进行了模拟。首先，对磁化箔翻转器的工作原理进行了模拟。构建并测试了一个完整的虚拟自旋回波小角中子散射仪器，分别在无实际散射样品和有实际散射样品的情况下进行测试。对于这些模拟而言，拥有一个能描述未散射中子透射束的模拟样品至关重要，而这在传统小角中子散射（SANS）仪器的模拟中通常并未实现。最后，对自旋回波调制小角中子散射（SEMSANS）仪器的工作原理进行了模拟。模拟结果与理论和实验结果吻合良好。该装置可以扩展到包含实际磁场分布，以全面预测未来拉莫尔标记弹性散射仪器的特性。现在可以针对SANS与SEMSANS更复杂的组合来模拟配置。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/c0203b2c1ce4/j-54-00195-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/0fe6d81270fe/j-54-00195-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/7cf35d3226f3/j-54-00195-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/6cf95016b517/j-54-00195-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/c859867095e8/j-54-00195-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/d7fe54b52735/j-54-00195-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/f1b0345fef66/j-54-00195-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/3b149ed4cf86/j-54-00195-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/636abcb5cde3/j-54-00195-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/d678f1826c36/j-54-00195-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/c0203b2c1ce4/j-54-00195-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/0fe6d81270fe/j-54-00195-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/7cf35d3226f3/j-54-00195-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/6cf95016b517/j-54-00195-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/c859867095e8/j-54-00195-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/d7fe54b52735/j-54-00195-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/f1b0345fef66/j-54-00195-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/3b149ed4cf86/j-54-00195-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/636abcb5cde3/j-54-00195-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/d678f1826c36/j-54-00195-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a13/7941320/c0203b2c1ce4/j-54-00195-fig10.jpg

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本文引用的文献

1
Mesoporous Silica Formation Mechanisms Probed Using Combined Spin-Echo Modulated Small-Angle Neutron Scattering (SEMSANS) and Small-Angle Neutron Scattering (SANS).利用组合自旋回波调制小角中子散射（SEMSANS）和小角中子散射（SANS）探究介孔二氧化硅的形成机制。
ACS Appl Mater Interfaces. 2020 Jun 24;12(25):28461-28473. doi: 10.1021/acsami.0c03287. Epub 2020 May 22.
2
Data Correction of Intensity Modulated Small Angle Scattering.强度调制小角散射的数据校正
Sci Rep. 2019 Jun 12;9(1):8563. doi: 10.1038/s41598-019-44493-9.
3
Quantitative Neutron Dark-field Imaging through Spin-Echo Interferometry.
通过自旋回波干涉测量法进行的定量中子暗场成像。
Sci Rep. 2015 Nov 12;5:16576. doi: 10.1038/srep16576.
4
Spin echo small angle neutron scattering using a continuously pumped (3)He neutron polarisation analyser.使用连续抽运的³He中子极化分析仪的自旋回波小角中子散射
Rev Sci Instrum. 2015 Feb;86(2):023902. doi: 10.1063/1.4909544.
5
The use of symmetry to correct Larmor phase aberrations in spin echo scattering angle measurement.
Rev Sci Instrum. 2008 Jun;79(6):063901. doi: 10.1063/1.2927251.