Expected radiation environment and damage for YBCO tapes in compact fusion reactors
Expected radiation environment and damage for YBCO tapes in compact fusion reactors
复制标题
紧凑型聚变反应堆中 YBCO 带的预期辐射环境和损害
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
F. Laviano
中科院分区：
文献类型：
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作者：
D. Torsello;D. Gambino;L. Gozzelino;A. Trotta;F. Laviano
我们调查的中子损伤预期在高温超导磁带，将采用紧凑型聚变反应堆。蒙特卡罗模拟产生了磁铁位置处预期的中子谱和注量，从中可以计算出构成超导体的每个原子种类的初级撞击原子能量分布。然后，这些信息被用来表征的位移级联，在尺寸和形态方面，通过分子动力学模拟。然后将预期的辐射环境与目前可用于实验研究的设施可实现的中子谱和注量进行比较，以突出可能与理解这些材料在真实的聚变条件下的辐射硬度相关的相似性和差异。我们发现，不同的中子谱导致不同的损伤制度，辐照温度的影响产生的缺陷的数量，和中子与超导体的相互作用的结果在局部温度升高。这些观察结果表明，在不同的制度，需要进一步的实验研究，一些中子屏蔽将是必要的紧凑型聚变反应堆。
We investigate the neutron damage expected in high-temperature superconducting tapes that will be employed in compact fusion reactors. Monte Carlo simulations yield the expected neutron spectrum and fluence at the magnet position, from which the primary knock-on atom energy distributions can be computed for each atomic species comprising the superconductor. This information is then employed to characterize the displacement cascades, in terms of size and morphology, through molecular dynamics simulations. The expected radiation environment is then compared with the neutron spectrum and fluences achievable at the facilities currently available for experimental investigation in order to highlight similarities and differences that could be relevant to the understanding of the radiation hardness of these materials in real fusion conditions. We find that the different neutron spectra result in different damage regimes, the irradiation temperature influences the number of generated defects, and the interaction of the neutrons with the superconductor results in a local increase in temperature. These observations suggest that further experimental investigations are needed in different regimes and that some neutron shielding will be necessary in compact fusion reactors.