| NUCLEAR PHYSICS |
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Development of a Spin-Exchange Optical Pumping-Based Polarized $^{3}$He System at the China Spallation Neutron Source (CSNS) |
| Chuyi Huang1,2†, Junpei Zhang1,2†, Fan Ye1,2, Zecong Qin1,2, Syed Mohd Amir1,2, Zachary Norris Buck1,2, Ahmed Salman1,2, Wolfgang Kreuzpaintner1,2, Xin Qi1,2, Tianhao Wang1,2*, and Xin Tong1,2* |
1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2Spallation Neutron Source Science Center, Dongguan 523803, China
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| Cite this article: |
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Chuyi Huang, Junpei Zhang, Fan Ye et al 2021 Chin. Phys. Lett. 38 092801 |
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Abstract Polarized $^{3}$He neutron spin filters (NSFs) can be used as a vital tool for neutron polarization production and analysis. The China Spallation Neutron Source (CSNS), as one of the major neutron facilities in China, has committed resources to the development of a polarized $^3$He NSF program to support its growing polarized neutron research. A spin-exchange optical pumping (SEOP)-based polarized $^{3}$He system and other necessary hardware for NSF transport has been recently developed. The performance of the system is benchmarked using an in-house developed cell named “Trident”. Neutron beam measurements yield a $^{3}$He polarization of 77% with over 200 h of on-beam relaxation time. Combining this newly developed SEOP system with the recently reported cell fabrication station, CSNS is now capable of the fully self-sustained production of $^{3}$He NSFs that shall support its future neutron polarization research.
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Received: 07 June 2021
Published: 02 September 2021
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| Fund: Supported by the National Key Research and Development Program of China (Grant No. 2020YFA0406000), the National Natural Science Foundation of China (Grant No. 11875265), the Scientific Instrument Developing Project of the Chinese Academy of Sciences [Grant No. 284(2018)], Guangdong Basic and Applied Basic Research Foundation (Grant No. 2019B1515120079) and Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents (Grant No. 20191122). |
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