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首页> 外文期刊>EPJ Web of Conferences >Slab geometry type cold neutron moderator development based on neutronic study for Riken Accelerator-driven compact Neutron Source (RANS)
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Slab geometry type cold neutron moderator development based on neutronic study for Riken Accelerator-driven compact Neutron Source (RANS)

机译：基于中性学研究的平板几何型冷中子主持机开发，riken加速器驱动紧凑型紧凑型孔源（RAN）

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摘要

Cold neutrons with energy less than several meV are good probes for material research, and they have been available on large neutron facilities, whereas it is not commonly available on compact accelerator-driven neutron source. RIKEN Accelerator-driven Neutron Source (RANS) is a pulsed neutron facility which provides thermal neutrons and high energy neutrons at several MeV. We started a project to implement a cold neutron moderator for RANS to broaden cold neutrons applications. A cold neutron moderator system with a mesitylene moderator at 20K and a polyethylene pre-moderator at room temperature in the slab geometry was designed for RANS. So far, the thickness of the pre-moderator and mesitylene have been optimized to get the highest cold neutron flux by using a Monte Carlo simulation code, PHITS. Graphite reflector dimensions were also proven to have significant effect to increase the cold neutron intensity.
机译：具有低于几个MEV的能量的冷中子是对材料研究的良好探头，它们在大型中子设施上可用，而在紧凑型加速器驱动的中子源上不可用。 Riken Accelerator驱动的中子源（RAN）是脉冲中子设施，可在几个MEV下提供热中子和高能量中子。我们开始了一个项目来实现一个寒冷的中子主持人，用于越来越宽的中子应用。设计了在平板几何中的20K和聚乙烯前调节器处的具有Mesitylene Moderator的冷中子剂量系统，​​为rans设计。到目前为止，通过使用Monte Carlo仿真代码，界面，已经优化了前调节器和Mesitylene的厚度以获得最高的冷中子磁通。石墨反射器尺寸也被证明具有显着效果，以增加冷中子强度。

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