CSNS中子斩波器研制和应用  

Development and Application of Neutron Chopper at CSNS

作　　者：王平[1,2] 蔡伟亮 张清 耿艳胜 张文翔 王芳卫 郭娟[4] 王闪闪[4] 张鸿 杨博[1] 周良[1,2] 蔡泽迎[1,2] WANG Ping;CAI Weiliang;ZHANG Qing;GENG Yansheng;ZHANG Wenxiang;WANG Fangwei;GUO Juan;WANG Shanshan;ZHANG Hong;YANG Bo;ZHOU Liang;CAI Zeyin(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]散裂中子源科学中心,东莞523803 [3]中国科学院物理研究所,北京100190 [4]深圳大学物理与光电工程学院,深圳518060

出　　处：《世界科技研究与发展》2022年第3期412-420,共9页World Sci-Tech R&D

基　　金：国家重大科技基础设施“散裂中子源”(发改高技[2008] 2578号);国家自然科学基金大装置联合基金“应用于非弹性中子散射谱仪的重复频率倍增方法研究”“费米中子斩波器关键技术研究”(U1932163,U1832128);中国科学院青年创新促进会(Y6291460K2)。

摘　　要：中国散裂中子源(CSNS)作为我国中子散射研究的大科学平台,是我国“十二五”期间重点建设的国家大科学装置,包括20台各具特色的飞行时间型中子散射谱仪。中子斩波器是从时间尺度上对束流调控的中子光学器件,属于中子散射谱仪不可缺少的关键设备,主要起到选择所需波段范围中子、提高信噪比的作用。CSNS对中子斩波器需求量大(约73台),有定期运行维护的需求。为突破关键设备依赖进口、受制于人的局面,确保大科学工程建设成功,CSNS于2007年开始组建中子斩波器研制团队,攻克了中子斩波器各项关键技术。带宽限制斩波器、T0斩波器和费米斩波器先后研制成功,实现了国产化,具有自主知识产权,并已大批量应用于散裂中子源一期工程(9台),散裂中子源合作谱仪项目(27台),即将应用于散裂中子源二期工程(约37台),为CSNS的顺利建成提供了重要保障,不仅在中国散裂中子源工程中得到了广泛的应用,还可以拓展推广应用于同步辐射光源(X射线斩波器)工程、高速旋转机械设备等领域。The China Spallation Neutron Source(CSNS),including 20 distinctive time-of-flight neutron scattering spectrometers, is a major scientific platform for China’s neutron scattering research and a national scientific device constructed during the 12 th Five-Year Plan of China.The neutron chopper is a neutron optical component that regulates the beam current on the scale of time, thereby being an indispensable part in a neutron scattering spectrometer.Its main functions are selecting the desired neutron band range and improving the signal-to-noise ratio.The CSNS needs approximately 73 sets of neutron choppers, which would require regular operation and maintenance.In order to avoid the import restriction of such critical instrument and ensure the success of the Big Scientific Engineering Construction, the CSNS formed a team for neutron chopper development in 2007,which overcame various key technological difficulties, successfully developed bandwidth limited chopper, T0 chopper and Fermi chopper in time, and realized the domestic production of neutron choppers with independent intellectual property rights.9 sets, 27 sets and 37 sets of these neutron choppers have been or will be applied in the CSNS’s Phase I Project, Cooperative Spectrometer Project, and the future Phase II Project, respectively.The independently developed neutron choppers provided an important guarantee for the smooth construction of the CSNS.Their use is not restricted to China spallation neutron source projects, but can be extended to synchrotron radiation light source(X-ray chopper) projects, high-speed rotation mechanical equipments and other fields.

关 键 词：散裂中子源 中子谱仪 中子斩波器 束流调控 同步控制 

分 类 号：O571.53[理学—粒子物理与原子核物理]