摘要
基于Monte Carlo方法,跟踪一大批入射粒子的运动,模拟1~10 Me V质子辐照下质子与CuCrZr合金的相互作用,计算出合金的阻止本领、能量传递、能量损失、射程、空位分布情况以及合金的辐照损伤分别与辐照深度、质子能量的关系,通过模拟CuCrZr合金在聚变反应中的工作环境,分析热沉材料的失效机理.研究结果表明:质子能量在1~10 Me V时,质子与CuCrZr合金发生非弹性碰撞,能量损失以电离能损失为主,表现出很好的抗辐照性能;质子在合金中的峰值深度随质子能量增加而增加,且近似指数关系,峰值深度为2~250μm;入射质子能量达到Me V级别时,溅射产额为零,CuCrZr合金可以很好的避免器壁的侵蚀;合金中空位的个数与入射质子能量呈线性关系,合金中空位和质子在合金中的分布具有同步性;质子损伤效率在合金深度方向呈现高斯分布,损伤最大值位置与辐照深度接近,随着入射质子能量的增加损伤效率最大值不断减小.
Simulation experiments were performed through tracking the motion of a large number of incident par- ticles to study the interaction between protons and CuCrZr alloy with the irradiation of 1 - 10 MeV proton based on the method of Mote Carlo. The impact of irradiation depth and proton energy on the alloy was considered re- spectively to calculate the condition of irradiation ability, energy loss, range, vacancy distribution and irradiation damage when tracking huge numbers of incident particles. Then, the failure mechanism of heat sink materials was analyzed under the simulated environment of fusion reaction to CuCrZr alloy. The results indicate that an ine- lastic collision occurs between CuCrZr alloy and protons, and the loss of energy is mainly due to ionization energy loss. Therefore, the CuCrZr alloy shows good antiradiation performance when the proton energy is between 1 MeV to 10MeV. The higher the alloy protons＇ energy increases, the deeper the protons＇ peak value becomes, analo- gous to the approximate exponential relationship. The peak depth value ranges from 2 μm to 250 μm. When the incident proton energy reaches MeV level,the sputtering yield could reduce to zero, so the CuCrZr alloy behave well to avoid the erosion. The vacancy＇ s quantity is linear with the energy of the incident protons, at the same time, the distribution of the vacancy and the protons stay in the alloy is ciency presents Gauss distribution in the depth direction of the alloy. And to the depth of irradiation. With the increase of the energy of the incident cy is decreasing. synchronous. The proton damage effi- the maximum damage is closely related proton, the maximum damage efficien-cy is decreasing.
出处
《原子与分子物理学报》
北大核心
2017年第5期942-948,共7页
Journal of Atomic and Molecular Physics
基金
贵州省联合基金(黔科合LH[2014]7606)
贵州大学引进人才项目(贵大人基合字(2014)44号)
