【摘要】 蓝宝石光学窗口在空间环境服役时,将会受到不同射线(如γ射线、X射线)以及离子流(如电子、质子等)的辐照作用,使其光学性质及结构发生变化,影响使用性能。为模拟空间环境,采用60Co源及电子流对蓝宝石进行辐照,研究了蓝宝石经辐照后的光学性能及结构变化,测试了蓝宝石辐照前后的表面粗糙度以及吸收光谱和荧光光谱变化。AFM实验表明,γ射线辐照对蓝宝石表面粗糙度几乎没有影响,而电子流辐照使得蓝宝石表面粗糙度增加。吸收光谱结果显示,蓝宝石经γ射线及电子流辐照后在紫外可见波段表现出较强的吸收,出现206,238,300和330 nm等吸收峰。荧光光谱发现335 nm和410 nm等荧光发光峰。最后分析了色心产生原因,计算了辐照前后的色心浓度。更多还原

【Abstract】 The sapphire is irradiated by different rays(such as γ-ray,X-ray) and the ion currents(such as electrons,protons,etc.) when used in space,thus the performance properties are decreased.In this paper,the sapphire is irradiated by 60[KG*7/8]Co source and electron current,and the optical and structural properties are studied after the irradiation.The surface roughness,the absorption and fluorescence spectroscopy are tested before and after the irradiation.γ-ray irradiation has a little effect on the surface roughness,but the electron current irradiation makes the surface roughness increase greatly.The absorption spectrum indicates that the sapphire shows absorption peaks in the UV-visible band,such as 206,238,300 and 330 nm.And 335 nm,410 nm and other fluorescent luminous peaks are found in the fluorescence spectrum.Finally,the cause to the absorption peaks is analyzed and the concentration of the color center before and after the irradiation is calculated.更多还原