铜基自屏蔽中子超反射镜波导
Self-Shielding Copper Substrate Neutron Supermirror Guides
摘要：
描述了自屏蔽铜基中子导管的发明，以及开发背后的基本原理和商业供应的实现。相对于现有技术的相对优势是量化的。这些优点包括易于制造、寿命长、热导率增加以及在keV-MeV能量范围内的快中子衰减增强。虽然铜的活化最初高于其他材料选择，但对于全能谱，许多同位素都是短寿命的，因此对于实际的维护访问时间，预计工人的辐射剂量低于钢，并且在Spectrometer目标整料之外的辐射安全的最低分区类别中。相对于已建立的替代品，对中子反射率性能没有影响，并且制造成本与其他抛光金属基板相似。
英文摘要：
The invention of self-shielding copper substrate neutron guides is described, along with the rationale behind the development, and the realisation of commercial supply. The relative advantages with respect to existing technologies are quantified. These include ease of manufacture, long lifetime, increased thermal conductivity, and enhanced fast neutron attenuation in the keV-MeV energy range. Whilst the activation of copper is initially higher than for other material options, for the full energy spectrum, many of the isotopes are short-lived, so that for realistic maintenance access times the radiation dose to workers is expected to be lower than steel and in the lowest zoning category for radiation safety outside the spallation target monolith. There is no impact on neutron reflectivity performance relative to established alternatives, and the manufacturing cost is similar to other polished metal substrates.
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