聚变α粒子对第一壁辐照损伤的蒙特-卡罗研究(Ⅱ)——溅射

本文应用蒙特-卡罗方法研究聚变α粒子对不锈钢第一壁的溅射损伤。首先,计算单种元素Fe,Cr,Ni的溅射产额随入射能量的变化,并与实验结果比较,以确定计算中所用到的一些重要参数,如原子位移能等。在此基础上计算聚变α粒子对不锈钢(Fe_0.73Cr_0.18Ni_0.09)的部分(和总)溅射产额,溅射粒子的能谱、角分布和源深度分布,以及上述各量与α粒子入射角的关系。结果表明,在考虑入射α粒子随能量及入射角的分布后,其平均总溅射产额为0.375。由于1

MONTE-CARLO STUDIES OF RADIATION DAMAGE INDUCED BY FUSION (II)——SPUTTERING

By means of the monte-carlo method based on the binary collision approximation, this paper investigates sputtering caused by fusion α-particles at the first wall of stainless steel (Fe_0.73Cr_0.18Ni_0.09). The parameters adjusted in accordance with a comparison of the calculated and measured sputtering yields of the elements Fe, Cr and Ni were used to study the partial sputtering yields, energy distribution, angular distribution and depth distribution of origin of the sputtered particles, as well as the dependence of those quantities with the angles of incidence. The results show that by taking into account the energy and incidence angle distribution, the averaged sputtering yield of α-panicles in stainless steel is about 0.375, and the higher energy component of α-particle plays minor role so far as sputtering is concerned.