中国物理B ›› 2010, Vol. 19 ›› Issue (1): 16103-016103.doi: 10.1088/1674-1056/19/1/016103
程秀围1, 关庆丰1, 范鲜红2, 陈波2
Cheng Xiu-Wei(程秀围)a), Guan Qing-Feng(关庆丰)a)†, Fan Xian-Hong(范鲜红)b), and Chen Bo(陈波)b)
摘要: We investigate the microstructures of the pure aluminium foil and filter used on the space solar telescope, irradiated by photons with different doses. The vacancy defect clusters induced by proton irradiation in both samples are characterized by transmission electron microscopy, and the density and the size distribution of vacancy defect clusters are determined. Their transmittances are measured before and after irradiating the samples by protons with energy E=100~keV and dose φ =6× 1011/mm2. Our experimental results show that the density and the size of vacancy defect clusters increase with the increase of irradiation doses in the irradiated pure aluminium foils. As irradiation dose increases, vacancies incline to form larger defect clusters. In the irradiated filter, a large number of banded void defects are observed at the agglomerate boundary, which results in the degradation of the optical and mechanical performances of the filter after proton irradiation.
中图分类号: (Point defects and defect clusters)