张红霞,徐大业,刘娟娟,罗伟,郝丽杰,刘蕴韬,程鹏,汪晋辰,鲍威

• 1:中国人民大学物理学院中子散射校内重点实验室
• 2:中国科学院高能物理研究所
• 3:散裂中子源科学中心
• 4:中国原子能科学研究院核物理研究所

摘要(Abstract)：

通过观测中子与样品相互作用后的能量和动量变化，中子散射技术已成为研究物质晶体结构、磁结构以及动力学等问题不可或缺的手段。本文详细介绍了历经六年建设完成的冷中子三轴极化谱仪“行知”和冷中子广谱谱仪“博雅”的主要设计特点和技术参数。文中展示了S型超反射镜中子极化器(S-bender)在“行知”上的应用和测试结果，这种在三轴谱仪样品后端和前端同时使用S-bender进行极化中子实验在国际上属于首例。“博雅”在分析器设计方面独创性地采用单晶双列罗兰几何圆阵列，既优化能量分辨率又提高信号强度，同时能够探测119°范围内的34个动量转移下的激发谱，每个分析探测通道包含5个固定能量和一个衍射模式测量，探测效率比传统的三轴谱仪提高两个数量级。本文最后，结合在“行知”和“博雅”上开展的部分实验案例和数据分析，探讨在凝聚态物理前沿的非常规超导材料、量子自旋液体候选材料、多铁材料、低维磁性材料等领域的应用。

关键词(KeyWords)： 非弹性中子散射;三轴谱仪;极化分析;多通道分析探测

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金国家重大科研仪器设备研制专项项目(NO.11227906);国家自然科学基金NSAF联合基金项目(NO.U2030106)

作者(Author): 张红霞,徐大业,刘娟娟,罗伟,郝丽杰,刘蕴韬,程鹏,汪晋辰,鲍威

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