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
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.
. [J]. 中国物理快报, 2021, 38(9): 92801-.
Chuyi Huang, Junpei Zhang, Fan Ye, Zecong Qin, Syed Mohd Amir, Zachary Norris Buck, Ahmed Salman, Wolfgang Kreuzpaintner, Xin Qi, Tianhao Wang, and Xin Tong. Development of a Spin-Exchange Optical Pumping-Based Polarized $^{3}$He System at the China Spallation Neutron Source (CSNS). Chin. Phys. Lett., 2021, 38(9): 92801-.
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