Development of a Spin-Exchange Optical Pumping-Based Polarized ^(3)He System at the China Spallation Neutron Source (CSNS)  

作　　者：Chuyi Huang Junpei Zhang Fan Ye Zecong Qin Syed Mohd Amir Zachary Norris Buck Ahmed Salman Wolfgang Kreuzpaintner Xin Qi Tianhao Wang Xin Tong 黄楚怡;张俊佩;叶凡;秦泽聪;Syed Mohd Amir;Zachary Norris Buck;Ahmed Salman;Wolfgang Kreuzpaintner;齐欣;王天昊;童欣(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]Spallation Neutron Source Science Center,Dongguan 523803,China

出　　处：《Chinese Physics Letters》2021年第9期38-42,共5页中国物理快报（英文版）

基　　金：Supported by 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.284(2018));Guangdong Basic and Applied Basic Research Foundation(Grant No.2019B1515120079);Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents(Grant No.20191122).

摘　　要：Polarized 3He 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.

关 键 词：POLARIZED SYSTEM RELAXATION 

分 类 号：O571.5[理学—粒子物理与原子核物理]