The general purpose powder diffractometer at CSNS
The general purpose powder diffractometer at CSNS
复制标题
CSNS 的通用粉末衍射仪
DOI：
10.1016/j.physb.2017.11.005
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发表时间：
2018-12-15
影响因子：
2.8
通讯作者：
He, Lunhua
中科院分区：
文献类型：
--
作者：
Chen, Jie;Kang, Le;He, Lunhua
中国散裂中子源（CSNS）的通用粉末衍射仪（GPPD）被设计为一种灵活和通用的仪器，用于广泛的晶体学和磁性结构研究。中子源采用去耦的毒化氢慢化剂。试样与慢化剂之间的距离为30m。采用聚焦中子导管和可互换的中子导管/准直器系统输运中子。该仪器可以优化配置，为个别实验所需的分辨率。有三组探测器（高角度、90度和低角度），覆盖0.05至28.11埃的宽d间隔。高角度探测器组的最佳分辨率将优于0.2%。样品位置的中子通量约为10(7)n/s/cm(2)。目前，GPPD主体建筑的建设和大部分关键部件的制造已在2016年完成。与相关系统的离线集成测试进展顺利。该项目将于2018年3月底完成，作为CSNS的三个首日仪器之一。
The general purpose powder diffractometer (GPPD) at the China Spallation Neutron Source (CSNS) is designed to be a flexible and versatile instrument for a wide range study of crystallographic and magnetic structures. Decoupled poisoned hydrogen moderator is used as its neutron source. The distance between the sample and moderator is 30 m. Focusing neutron guide and an interchangeable neutron guide/collimator system are employed to transport neutron. The instrument can be optimally configured for individual experiments with desired resolution. There are three detector banks (high-angle, 90 degrees, and low-angle), covering a wide d-spacing from 0.05 to 28.11 angstrom. The best resolution will be better than 0.2% at high angle detector bank. The neutron flux at the sample position will be at the order of 10(7) n/s/cm(2). Now the construction of GPPD main building and fabrication of most key components have been done within 2016. The off-line integrated test with related system is going on well. The project will be completed in the end of March 2018, as one of the three day-one instruments for CSNS.