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arXiv 2402.01626physics.ins-det
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高通量同位素反应堆现代冷三轴谱仪入射束线设计

Incident Beamline Design for a Modern Cold Triple Axis Spectrometer at the High Flux Isotope Reactor

G. E. Granroth, M. Daum, A. A. Aczel, T. J. Williams, B. Winn, J. A. Fernandez-Baca, M. Mourigal, M. D. Lumsden

AI总结:

为橡树岭国家实验室高通量同位素反应堆规划现代冷三轴谱仪,设计入射束线以在2厘米×2厘米样品上提供约$10^8\mathrm{\frac{n}{cm^2 s}}$中子通量,包含多通道导管、速度选择器、极化组件和双聚焦单色器,并优化了导管与单色器性能。

摘要:

橡树岭国家实验室高通量同位素反应堆(HFIR)正在规划一台现代冷三轴谱仪。本文描述了入射束线的设计,该束线将在2厘米×2厘米的样品上提供约$10^8\mathrm{\frac{n}{cm^2 s}}$的中子通量。设计考虑了HFIR当前的物理约束,并能兼容单路和多路分析器-探测器次级谱仪以及大型超导磁体。拟议的入射束线包括一个具有水平聚焦功能的多通道导管、一个中子速度选择器、用于实现入射束极化选项的组件,以及一个双聚焦热解石墨单色器。本文描述了导管系统和单色器的优化过程,并总结了非极化操作下入射束线的预期性能。

英文摘要:

A modern cold triple axis spectrometer is being planned for the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Here, we describe the design of an incident beamline that will put a flux of $\sim 10^8\mathrm{\frac{n}{cm^2 s}}$ on a sample with an area of 2 cm x 2 cm. It takes current physical constraints at HFIR into account and it can accommodate both single and multiplexed analyzer-detector secondary spectrometers and large superconducting magnets. The proposed incident beamline includes a multi-channel guide with horizontal focusing, a neutron velocity selector, components to facilitate an incident beam polarization option, and a double-focusing pyrolytic graphite monochromator. This work describes the process of optimizing the guide system and monochromator and summarizes the expected performance of the incident beamline for non-polarized operation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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