Conceptual Design of a Long Wavelength Target Station at the Spallation Neutron Source

该奖项支持散裂中子源长波目标站的概念设计，以及支持建造的设计开发和研发。第二个长波靶站将利用SNS加速器来提高利用波长大于2埃的中子的中子散射仪的性能(与SNS项目正在建造的高功率靶站相比)。这将显著提高SNS在磁学、聚合物科学、生物材料和结构生物学、液体和非晶态材料以及特征长度大于10埃而特征能量小于1 MeV的其他领域的学术用户群的能力。仪器设计和科学将由科学界制定，并与产生中子的靶和慢化剂系统的设计相协调。。%中子是研究材料结构和动力学的有力工具。测量从材料散射的中子产生的图案的仪器可以用来确定原子在哪里以及它们是如何运动的。这项提议将为开发将在散裂中子源建造的实验大厅和相关仪器的设计工作提供资金，散裂中子源是正在橡树岭建造的一个新的中子散射实验室。为SNS建造的相同加速器也可以用来在这个第二个长波目标站产生中子。在SNS中增加这样一个靶站将极大地提高其为物理、化学、生物、工程材料和纳米材料等领域的学术研究人员提供科学研究的能力。该提案将让来自多个机构的研究人员参与设施及其仪器的设计和开发，并在第一年内完成长波长目标站的完整提案*

0073038MasonThis award supports the conceptual design of a Long Wavelength Target Station at the Spallation Neutron Source as well as design development and R&D to support construction. A second, long wavelength target station would make use of the SNS accelerator to increase the performance of neutron scattering instruments making use of neutrons with wavelengths greater than two angstroms (compared to the High Power Target Station being built by the SNS Project). This will significantly enhance the capabilities of SNS for the academic user community in magnetism, polymers science, biomaterials and structural biology, liquids and amorphous materials, and other fields where characteristic lengths are greater than ten angstroms and characteristic energies are less than 1 meV. Instrument designs and the science they will enable will be developed by the scientific community and coordinated with the design of the target and moderator systems that produce the neutrons. . %%% Neutrons are a powerful tool for the study of the structure and dynamics of materials. Instruments that measure the patterns produced by neutrons scattered from materials can be used to determine where the atoms are and how they move. This proposal will fund work to develop a design for an experimental hall and associated instruments to be built at the Spallation Neutron Source, a new neutron scattering laboratory being built in Oak Ridge. The same accelerator being built for SNS can also be used to produce neutrons at this second, Long Wavelength Target Station. Adding such a target station to SNS will greatly enhance its scientific capacity for academic researchers in physics, chemistry, biology, engineering materials, and nanomaterials. The proposal will involve researchers from many institutions in the design and development of a facility and its instrumentation with a full proposal for the Long Wavelength Target Station to be completed in the first year***