| In-situ optical pumping for polarizing 3He neutron spin filters at the China Spallation Neutron Source |
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| 作者姓名： | Junpei Zhang Chuyi Huang Zecong Qin Fan Ye Syed Mohd Amir Ahmed Salman Yuchen Dong Long Tian Zachary Norris Buck Wolfgang Kreuzpaintner Matthew Musgrave Xin Qi Tianhao Wang Xin Tong |
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| 作者单位： | Institute of High Energy Physics;Spallation Neutron Source Science Center;University of Chinese Academy of Sciences;College of Materials Science and Engineering;National Institute of Standards and Technology |
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| 基金项目： | supported by the National Key Research and Development Program of China(Grant No.2020YFA0406000);National Natural Science Foundation of China(Grant No.11875265);Scientific Instrument Developing Project of the Chinese Academy of Sciences(Grant No.ZDKYYQ20190004);Guangdong Basic and Applied Basic Research Foundation(Grant No.2019B1515120079);Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents(Grant No.20191122)。 |
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| 摘 要： | In this paper,we present the performance of a recently developed in-situ spin-exchange optically pumped3He-neutron spin filter system at the China Spallation Neutron Source(CSNS).The system achieved a3He polarization of over 74%at the beamline BL-20.Analysis of neutron transmission experiment results reveals a neutron polarization of>90%and an average transmission of 27%for 2.2?neutrons,which were maintained for a duration of 120 h of beam time.To the best of our knowledge,this is the first in-situ hyperpolarized3He system incorporated on a neutron beamline in China.This technology is expected to provide stable,wide-angle,and highly polarized neutrons at the CSNS for materials research and fundamental neutron physics.
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| 关 键 词： | spin-exchange optical pumping 3He polarization neutron spin filter neutron polarization |
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