聚变堆第一壁材料溅射的计算机模拟

COMPUTER SIMULATION OF SPUTTERING OF THE FIRST WALL MATERIALS IN FUSION REACTOR

用基于两体碰撞近似的蒙特卡罗模拟方法,研究聚变α粒子对反应堆第一壁材料(C、W、Be、SiC及不锈钢Fe_(0.73)Cr_(0.18)Ni_(0.09))的溅射损伤.着重讨论上述材料溅射产额随入射能量的变化以及它与实验结果的比较,并且给出具有一定能量分布的α粒子轰击第一壁时,各种材料的溅射产额,溅射粒子能谱、角分布和源深度分布,以及α粒子入射角对溅射产额的影响.计算结果表明,在相同入射条件下,不锈钢的溅射产额较大,其余几种材料的溅射产额几乎相等.

In this paper, the sputtering caused by fusion of α-particles in the first wall of C, W, Be, SiO and stainless steel (Fe0.73Cr0.18Ni0.09) is investigated by using the Monte Carlo simulation, which is based on the binary collision approximation. The dependence of sputtering yields of the above-mentioned materials on the incident energy as well as the comparisons of results calculated with The Monte Carlo method with results from experiments are discussed. Under the condition of multi-energy a-particles bombardment, the sputtering yields, energy distribution, angular distribution and depth distribution of the origin of the sputtered particles, as well as the effect of incidence angle on sputtering yields are presented. The results show that under the same incident condition, the sputtering yield of stainless steel is higher than the yields of other materials, and that the yields of the rest are almost equal.