Polarization-Analyzed Small-Angle Neutron Scattering with an $\textit{in-situ}$ $^{3}$He neutron spin filter at the China Spallation Neutron Source
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909464411504640 |
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| author | Tian, Long Gao, Han Wang, Tianhao Teng, Haiyun Tang, Jian Zheng, Qingbo Zuo, Taisen Cui, Tengfei Wang, Bin Qin, Xu Qiu, Yongxiang Dong, Yuchen Zheng, Yujie Qin, Zecong Han, Zehua Zhang, Junpei Cheng, He Tong, Xin |
| author_facet | Tian, Long Gao, Han Wang, Tianhao Teng, Haiyun Tang, Jian Zheng, Qingbo Zuo, Taisen Cui, Tengfei Wang, Bin Qin, Xu Qiu, Yongxiang Dong, Yuchen Zheng, Yujie Qin, Zecong Han, Zehua Zhang, Junpei Cheng, He Tong, Xin |
| contents | Polarization-analyzed small-angle neutron scattering (PASANS) is an advanced technique that enables the selective investigation of magnetic scattering phenomena in magnetic materials and distinguishes coherent scattering obscured by incoherent backgrounds, making it particularly valuable for cutting-edge research. The successful implementation of PASANS in China was achieved for the first time at the newly commissioned Very Small Angle Neutron Scattering (VSANS) instrument at the China Spallation Neutron Source (CSNS). This technique employs a combination of a double-V cavity supermirror polarizer and a radio frequency (RF) neutron spin flipper to manipulate the polarization of the incident neutrons. The scattered neutron polarization is stably analyzed by a specially designed $\textit{in-situ}$ optical pumping $^{3}$He neutron spin filter, which covers a spatially symmetric scattering angle coverage of about 4.8 $^{\circ}$. A comprehensive PASANS data reduction method, aimed at pulsed neutron beams, has been established and validated with a silver behenate powder sample, indicating a maximum momentum transfer coverage of approximately 0.25 Å $^{-1}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_13647 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polarization-Analyzed Small-Angle Neutron Scattering with an $\textit{in-situ}$ $^{3}$He neutron spin filter at the China Spallation Neutron Source Tian, Long Gao, Han Wang, Tianhao Teng, Haiyun Tang, Jian Zheng, Qingbo Zuo, Taisen Cui, Tengfei Wang, Bin Qin, Xu Qiu, Yongxiang Dong, Yuchen Zheng, Yujie Qin, Zecong Han, Zehua Zhang, Junpei Cheng, He Tong, Xin Instrumentation and Detectors Nuclear Experiment Polarization-analyzed small-angle neutron scattering (PASANS) is an advanced technique that enables the selective investigation of magnetic scattering phenomena in magnetic materials and distinguishes coherent scattering obscured by incoherent backgrounds, making it particularly valuable for cutting-edge research. The successful implementation of PASANS in China was achieved for the first time at the newly commissioned Very Small Angle Neutron Scattering (VSANS) instrument at the China Spallation Neutron Source (CSNS). This technique employs a combination of a double-V cavity supermirror polarizer and a radio frequency (RF) neutron spin flipper to manipulate the polarization of the incident neutrons. The scattered neutron polarization is stably analyzed by a specially designed $\textit{in-situ}$ optical pumping $^{3}$He neutron spin filter, which covers a spatially symmetric scattering angle coverage of about 4.8 $^{\circ}$. A comprehensive PASANS data reduction method, aimed at pulsed neutron beams, has been established and validated with a silver behenate powder sample, indicating a maximum momentum transfer coverage of approximately 0.25 Å $^{-1}$. |
| title | Polarization-Analyzed Small-Angle Neutron Scattering with an $\textit{in-situ}$ $^{3}$He neutron spin filter at the China Spallation Neutron Source |
| topic | Instrumentation and Detectors Nuclear Experiment |
| url | https://arxiv.org/abs/2501.13647 |