Fast ion confinement is of major importance for the ignition of a burning fusion plasma. In future deuterium plasma campaigns of the Wendelstein 7‐X stellarator, W7‐X, the amount of triton burn‐up is one possible measure for fast ion confinement. A well‐established technique to observe triton burn‐up is the 14 MeV neutron rate. In this paper, it is estimated whether an existing scintillating fibre neutron detector is also suited to measure triton burn‐up in W7‐X with sufficient accuracy. An estimation is presented, which can be applied to any tokamak or stellarator design and is one‐dimensional in the minor radius. The inputs are profiles of density, temperature, and differential volume element as well as the triton slowing‐down time. The estimation calculates the thermal deuteron fusion rate and the associated deuteron‐triton fusion rate; thus, the triton burn‐up generated 14 MeV neutron rate. It neither takes triton diffusion nor explicit losses into account. This thermally generated fusion rate is compared to the neutral beam injection heating induced beam‐plasma fusion rate.

中文翻译：

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在未来的W7-X氘等离子体战役中tri核燃烧可估算14 MeV中子速率

快速的离子限制对于燃烧的聚变等离子体的点火至关重要。在Wendelstein 7-X恒星器W7-X的未来氘等离子体运动中，tri子燃烧的量是快速限制离子的一种可能措施。观测tri子燃烧的一种成熟技术是14 MeV中子速率。在本文中，估计现有的闪烁纤维中子探测器是否也适合以足够的精度测量W7-X中的tri子燃耗。提出了一种估计，该估计可以应用于任何托卡马克或恒星设计，并且在短半径内是一维的。输入是密度，温度和微分体积元素以及the核减速时间的曲线。该估算计算出氘核的热融合速率和相关的氘-tri子的融合速率；从而，ton核燃烧产生14 MeV的中子速率。它既不考虑Triton扩散，也不考虑显式损耗。将这种热产生的融合率与中性束注入加热引起的束-等离子体融合率进行比较。