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Development of a $^3$He Gas Filling Station at the China Spallation Neutron Source |
| Zecong Qin1,2†, Chuyi Huang1,2†, Z. N. Buck1,2†, W. Kreuzpaintner1,2, S. M. Amir1,2, A. Salman1,2, Fan Ye1,2, Junpei Zhang1,2, Chenyang Jiang3, Tianhao Wang1,2*, and Xin Tong1,2* |
1Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China
2Spallation Neutron Source Science Center, Dongguan 523803, China
3Oak Ridge National Laboratory, Oak Ridge, TN 37930, USA
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| Cite this article: |
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Zecong Qin, Chuyi Huang, Z. N. Buck et al 2021 Chin. Phys. Lett. 38 052801 |
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Abstract At the China Spallation Neutron Source (CSNS), we have developed a custom gas-filling station, a glassblowing workshop, and a spin-exchange optical pumping (SEOP) system for producing high-quality $^3$He-based neutron spin filter (NSF) cells. The gas-filling station is capable of routinely filling $^3$He cells made from GE180 glass of various dimensions, to be used as neutron polarizers and analyzers on beamlines at the CSNS. Performance tests on cells fabricated at our gas-filling station are conducted via neutron transmission and nuclear-magnetic-resonance measurements, revealing nominal filling pressures, and a saturated $^3$He polarization in the region of 80%, with a lifetime of approximately 240 hours. These results demonstrate our ability to produce competitive NSF cells to meet the ever-increasing research needs of the polarized neutron research community.
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Received: 10 March 2021
Published: 02 May 2021
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| Fund: Supported by the National Key Research and Development Program of China (Grant No. 2020YFA0406000), the Scientific Instrument Development Project of the Chinese Academy of Sciences [Grant No. 284(2018)], and the National Natural Science Foundation of China (Grant No. 11875265). |
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