中国物理B ›› 2010, Vol. 19 ›› Issue (1): 16103-016103.doi: 10.1088/1674-1056/19/1/016103

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Effect of vacancy defect clusters on the optical property of the aluminium filter used for the space solar telescope

程秀围1, 关庆丰1, 范鲜红2, 陈波2   

  1. (1)College of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China; (2)State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 收稿日期:2009-04-14 修回日期:2009-05-11 出版日期:2010-01-15 发布日期:2010-01-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 50671042), the Program for Innovative Research Team of Jangsu University and the Program for Exellent Talents of Jangsu University (Grant No. 07JDG032).

Effect of vacancy defect clusters on the optical property of the aluminium filter used for the space solar telescope

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)   

  1. a College of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China; b State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • Received:2009-04-14 Revised:2009-05-11 Online:2010-01-15 Published:2010-01-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 50671042), the Program for Innovative Research Team of Jangsu University and the Program for Exellent Talents of Jangsu University (Grant No. 07JDG032).

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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.

Abstract: 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 $\phi$ =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.

Key words: proton irradiation, vacancy defect clusters, aluminium filter, optical performance

中图分类号:  (Point defects and defect clusters)

  • 61.72.J-
42.79.Ci (Filters, zone plates, and polarizers) 61.72.Qq (Microscopic defects (voids, inclusions, etc.)) 61.80.Jh (Ion radiation effects) 95.55.Ev (Solar instruments)