论文标题
Wendelstein 7-X的蛇中子模型14.1 MEV中子
Serpent neutronics model of Wendelstein 7-X for 14.1 MeV neutrons
论文作者
论文摘要
在这项工作中，制备了Wendelstein 7-X（W7-X）恒星的蛇2中子模型，并使用模型计算闪烁纤维中子检测器（SCIFI）的响应函数。中子学模型包括恒星本身的关键组成部分以及圆环大厅的简化几何形状。该模型的目的是评估W7-X中Deuteron-Triton融合中的14.1 MeV中子通量，其中仅对中子进行建模，直到它们放慢至1 MeV的能量为止。本文的关键信息是：尤其是W7-X的非结构化网格几何用法的演示； W7-X中快速中子行为的模型和第一见解的技术文献，尤其是与Scifi相关的：该模型表明超导线圈是最强的散射体和块中子的中子。来自例如发现巨大的钢支撑结构很小。与具有有效的视线相比，SCIFI将从扩展的血浆体积中检测中子。
In this work, a Serpent 2 neutronics model of the Wendelstein 7-X (W7-X) stellarator is prepared, and an response function for the Scintillating-Fibre neutron detector (SciFi) is calculated using the model. The neutronics model includes the simplified geometry for the key components of the stellarator itself as well as the torus hall. The objective of the model is to assess the 14.1 MeV neutron flux from deuteron-triton fusions in W7-X, where the neutrons are modelled only until they have slowed down to 1 MeV energy. The key messages of this article are: demonstration of unstructured mesh geometry usage for stellarators, W7-X in particular; technical documentation of the model and first insights in fast neutron behaviour in W7-X, especially related to the SciFi: the model indicates that the superconducting coils are the strongest scatterers and block neutrons from large parts of the plasma. The back-scattering from e.g. massive steel support structures is found to be small. The SciFi will detect neutrons from an extended plasma volume in contrast to having an effective line-of-sight.
