Time evolution calculation of muon catalysed fusion: Emission of recycling muons from a two-layer hydrogen film

Time evolution calculation of muon catalysed fusion: Emission of recycling muons from a two-layer hydrogen film
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μ子催化聚变的时间演化计算:两层氢膜中回收μ子的发射

DOI:
10.1016/j.fusengdes.2021.112580
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发表时间:
2021
影响因子:
1.7
通讯作者:
T. Yamashita et al.
T. Yamashita et al.
中科院分区:
工程技术3区
文献类型:
--
作者:
Kiriha Tanaka*;Jun Muto;Yasuo Yabe;Toshitaka Oka;Hiroyuki Nagahama (2021);K. Okutsu et al.;T. Yamashita et al.

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在μ子催化聚变(μ CF)循环中产生的具有约10 keV动能的再循环μ子有望成为具有高空间/时间相干性的负μ子束源。本文报道了μ CF循环的时间演化计算,重点研究了氢膜靶中再循环μ子的发射。采用四阶Runge-Kutta方法求解μ CF反应的速率方程。考虑由1 mm氢氘层和2 μm氘氚层组成的双层固体氢膜靶,数值模拟了两层靶中μ子态及其布居的时间演化.通过引入μ介子氘原子通过Ramsauer-Townsend效应在层间移动的概率,同时解决了层中μ介子的原子和分子过程。T2的使用放大了再循环的μ子发射.预测了再循环μ子的发射分数对T2浓度的弱依赖性,这可以用来最大限度地减少氚的使用。
Recycling muon having approximately 10 keV kinetic energy produced in a muon catalysed fusion (μ CF) cycle is expected to be a source of negative muon beam with high-spatial/time coherence. We report a time evolution calculation of μ CF cycle with a particular focus on the emission of recycling muons from a hydrogen film target. Rate equations for the μ CF reactions are solved using the 4th-order Runge-Kutta method. Considering a two-layer solid hydrogen film target composed of 1 mm hydrogen-deuterium layer and 2 µm deuterium-tritium layer, we have numerically simulated the time evolution of the muonic states and their populations in these layers. The muon atomic and molecular processes in the layers are solved simultaneously by introducing a probability of muonic deuterium atoms traveling between the layers via the Ramsauer-Townsend effect. The use of T 2 amplifies the recycling muon emission. A weak dependence of the emission fraction of the recycling muons on the T 2 concentration is predicted, which can be utilized to minimize the usage of tritium.
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