Upgrading of a Neutron Diffractometer at Los Alamos Neutron Science Center for Materials Research and Education

该仪器开发奖来自材料研究仪器计划，允许宾夕法尼亚大学将洛斯阿拉莫斯中子科学中心（LANSCE）的中子粉末衍射仪（NPD）升级为世界级的高分辨率衍射仪，用于材料研究和教育。通过这次升级，光束线将具有同时进行高Q（动量转移）晶体学分析以及实空间原子对密度函数（PDF）分析的独特能力。通过增加一个大的后向散射探测器模块、升级计算机和安装一个光束斩波器，高角度数据采集率将提高五倍。国家方案司的升级将产生广泛的教育影响。数据收集率的五倍增长将为来自五个不同机构的研究生创造更多的研究机会。研究生还将参与校准任务和软件开发，从而获得在国家设施中设置大型仪器的宝贵经验。 该项目将大大有助于增加大学用户。 * 脉冲中子粉末衍射法在材料研究中的威力得到广泛认可。它能够高精度地确定复杂材料的原子结构，从而为材料科学和技术提供至关重要的基础信息。该奖项将使宾夕法尼亚大学能够对洛斯阿拉莫斯中子科学中心（LANSCE）的中子粉末衍射仪（NPD）进行极具成本效益的升级，使其成为世界一流的高分辨率衍射仪，用于材料研究和教育。这将大大提高数据收集率，提高五倍。升级这条光束线将对五个不同机构的研究生教育和培训产生重大影响。这将有助于克服美国在中子散射方面训练有素的科学家的严重短缺。IMR奖励使用LANSCE的资金进行了大量杠杆操作。%

This instrument development award from the Instrumentation for Materials Pesearch program allows the to the university of Pennsylvania to upgrade the Neutron Powder Diffractometer (NPD) at the Los Alamos Neutron Science Center (LANSCE) to a world-class high-resolution diffractometer for materials research and education. With this upgrade the beamline will have a unique capability for simultaneous high-Q (momentum transfer) crystallographic analysis as well as the real-space atomic pair-density function (PDF) analysis. The data acquisition rate at high angles will increase by a factor of five by adding a large backscattering detector module, upgrade computers and install a beam-chopper. The upgrading of NPD will have wide-ranging educational impact. This fivefold increasing in the data collection rate will create more research opportunities for graduate students from five different institutions. Graduate students will also participate in the calibration task and development of software, and thus acquire precious experience of setting up a large instrument at a national facility. This project will significantly contribute to increasing the university users. ***The power of pulsed neutron powder diffraction method in materials research is widely recognized. It is capable of determining the atomic structure of complex materials with high accuracy, thus providing basic information vital to materials science and technology. This award will allow the University of Pennsylvania to carry a very cost-effective upgrade of the Neutron Powder Diffractometer (NPD) at the Los Alamos Neutron Science Center (LANSCE) to a world-class high-resolution diffractometer for materials research and education. This will allow a dramatic improvement of the data collection rate, by a factor of five. Upgrading this beamline will have significant impact on graduate education and training at five different institutions. This will help contribute to overcome a critical shortage of trained scientists in neutron scattering in the US. The IMR award is significantly leveraged using funds from LANSCE.%%%