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arXiv · 2409.16598

First Use of a Polarized $^3$He Neutron Spin Filter on the Back-n White Neutron Source of CSNS

Mofan Zhang·Zhou Yang·Junpei Zhang·Chuyi Huang·Tianhao Wang·Yonghao Chen·Ruirui Fan·W. Michael Snow
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Abstract

Polarized eV neutrons can address interesting scientific questions in nuclear physics, particle physics, and astrophysics/cosmology. We present the first experiment to polarize the neutrons on the Back-n beamline at the Chinese Spallation Neutron Source (CSNS) using an in-situ NSF using spin-exchange optical pumping (SEOP) of 3He. A 3He polarization of 68%$\pm$0.7% for this in-situ NSF was measured through neutron transmission method at Back-n.This is high enough to enable new experiments on the Back-n beamline. Polarized neutron, Polarized nuclei, CSNS, White neutron, Fundamental physics research PACS number(s): 24.80.+y, 67.30.ep, 29.27.Hj , 24.70.+s , 32.10.Dk

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Mofan Zhang, Zhou Yang, Junpei Zhang, Chuyi Huang, Tianhao Wang, Yonghao Chen, Ruirui Fan, W. Michael Snow. 2024-09-25. First Use of a Polarized $^3$He Neutron Spin Filter on the Back-n White Neutron Source of CSNS. https://doi.org/10.1016/j.nima.2024.170184

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