空间高能质子对飞行器材料的损伤分析

Damage of High Energy Protons Impact on Spacecraft Materials

针对高能粒子在空间环境中的辐射,本文简要介绍了空间高能质子在空间环境中的分布情况及在物质中的传输问题,评述了国外有关高能质子的非电离能损失及线性能量转移研究,并在此基础上重点分析和研究了高能质子对航空、航天材料的辐射损伤。从空间高能质子对材料的辐射损伤的角度,分析讨论了材料厚度与屏蔽效果的关系并提出了一些相关性的结论和展望;能量为10MeV～80MeV的质子最可能发生辐射损伤效应,质子拟合公式适合于入射质子能量较小的情况。

In this paper,as far as the radiation of high energy particles in space environment concerned,we simply described the distribution of high energy protons in space environment and the conditions of transmission in materials.At the same time,a large number of foreign papers and literatures have to do with the study of non-ionizing energy loss of high energy protons and linear energy transfer（LET）were reviewed.Then based on the reviews and description above,the radiation damage of high energy protons impact on materials for using to the aspect of the aviation and spaceflight was analyzed and studied principally. And then we also analyzed and discussed the relation between the materials thickness and the shielding effect of materials thickness from the damage of high energy protons impact on spacecraft materials. Finally, several correlative views about the damage of high energy protons were obtained and the prospect was presented. In these results, we can see that it is highly possible to occur the effect of radiation damage when the high energy protons＇ energies are located at the range of 10MeV to 80MeV. The formula of space protons is suited to the situation, which protons incident energies are smaller.