A Compact in situ Polarized ^(3)He System for Neutron Scattering  

作　　者：Jian Tang Bin Wang Chuyi Huang Han Gao Qingbo Zheng Renhong Liu Fan Ye Zecong Qin Tianhao Wang Ahmed Salman Yuchen Dong Long Tian Changdong Deng Jun Li Lei Liu Xin Qi Junpei Zhang Xin Tong 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Science,Beijing 100049,China [2]Spallation Neutron Source Science Center,Dongguan 523803,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Guangdong Provincial Key Laboratory of Extreme Conditions,Dongguan 523803,China [5]Center for Neutron Science and Technology,Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-Sen University,Guangzhou 510275,China [6]J¨ulich Centre for Neutron Science at MLZ,Lichtenbergstr.1,85747 Garching,Germany

出　　处：《Chinese Physics Letters》2025年第2期36-40,共5页中国物理快报(英文版)

基　　金：supported by the National Science Fund for Distinguished Young Scholars(Grant No.12425512);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.ZDKYYQ20190004);the Guangdong Basic and Applied Basic Research Foundation(Grant No.2019B1515120079);Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents(Grant No.20191122);Guangdong Provincial Key Laboratory of Extreme Conditions,Dongguan Key Laboratory。

摘　　要：This study investigates the performance of a new compact(55 cm×56 cm×48 cm)in situ spin-exchange optical pumping ^(3)He neutron spin filter(NSF)system developed at the China Spallation Neutron Source.The enclosed NSF cell,filled with3He at 2.53 bar,achieved an initial ^(3)He polarization of approximately 60%.After subsequent improvements in the magnetic field and heating system,this in situ system achieved a ^(3)He polarization of 75.66%±0.09%,resulting in 96.30%neutron polarization at 2A.This highly compact in situ system is equipped with self-supportive features,pre-pumping capabilities,polarization maintenance,and a low-noise nuclear magnetic resonance system.These advantages significantly reduce the preparation time and simplify polarized neutron experiments,making it suitable for various neutron beamlines in China,particularly those with a limited sample space.These characteristics establish it as a quasi-standardized system that plays a vital role in polarized neutron experiments,including those involving polarized neutron imaging,neutron reflection,the performance calibration of polarized neutron instruments,and the neutron optics parity and time reversal experiment.

关 键 词：POLARIZED SYSTEM equipped 

分 类 号：O57[理学—粒子物理与原子核物理]