在单色和飞行时间仪器上使用 McStas 对自旋回波 SANS(SESANS)进行模拟

IF 1 Q3 NUCLEAR SCIENCE & TECHNOLOGY Journal of Neutron Research Pub Date : 2024-04-16 DOI:10.3233/jnr-240004
Steven R. Parnell, Fankang Li, Wesley Stevense, W. Bouwman
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引用次数: 0

摘要

我们对自旋回波小角度中子散射(SESANS)进行了模拟,在使用四个磁性沃拉斯顿棱镜的装置上采用蒙特卡洛方法。我们的主要重点是验证这些模型,包括各种中子波长的单色方案,以确定模拟的可靠性。随后,我们将验证范围扩大到飞行时间模式下的模拟。我们的模型一致而精确地预测了稀释球在单色模式和飞行时间模式下的散射模式。值得注意的是,它还准确地再现了与发生在第三和第四磁性沃拉斯顿棱镜之间的散射相关的复杂编码,这为我们提供了另一种增加 SESANS 仪器固角覆盖范围的方法。这一验证过程最终证明了我们模拟方法的有效性。重要的是,它为模拟更复杂、更逼真的仪器配置铺平了道路,拓宽了未来研究工作的视野。
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Simulation of spin-echo SANS (SESANS) using McStas on monochromatic and time of flight instruments
We conduct simulations of Spin Echo Small Angle Neutron Scattering (SESANS) by employing Monte Carlo methods to a setup using four magnetic Wollaston prisms. Our primary focus involves the validation of these models, encompassing monochromatic scenarios across various neutron wavelengths to ascertain the reliability of the simulations. Subsequently, we extend this validation to encompass simulations in time-of-flight mode. Our model consistently and precisely predicts the scattering patterns emanating from dilute spheres in both monochromatic and time-of-flight modes. Notably, it also accurately reproduces the intricate encoding associated with scattering occurring between the third and fourth magnetic Wollaston prism, which provides us with another approach to increase the solid angle coverage of a SESANS instrument. This validation process conclusively demonstrates the efficacy of our simulation methods. Importantly, it paves the way for simulating more intricate and realistic instrumental configurations, broadening the horizons for future research endeavours.
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来源期刊
Journal of Neutron Research
Journal of Neutron Research NUCLEAR SCIENCE & TECHNOLOGY-
CiteScore
2.30
自引率
9.10%
发文量
23
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