CMOS APS图像传感器辐照效应实验及损伤机理研究

CMOS有源像素（APS）图像传感器是近年来发展十分迅速的一种新型固态成像器件，在遥感成像、星敏感器和太阳敏感器等航天成像采集与处理方面具有独特的优势。CMOS APS图像传感器在空间辐射或核辐射环境中应用时，辐射损伤会诱发暗信号增大，噪声增大以及暗信号尖峰产生等现象，导致图像质量降低，严重时甚至出现功能失效，对战略武器生存和航天器在轨正常运行和效能发挥构成严重威胁。国内相关研究开展的很少，随着CMOS APS图像传感器的广泛应用，其辐照损伤效应和抗辐射加固技术亟待深入研究。本项目通过分别开展CMOS APS图像传感器中子和γ辐照效应实验，得到位移损伤和电离损伤效应实验规律，结合辐射粒子输运模拟计算和理论分析，弄清辐照损伤机理，阐述位移损伤诱发暗信号尖峰的产生机制及场增强效应的基本物理机制，将为CMOS APS图像传感器辐照损伤评估和抗辐照加固技术研究提供理论基础和实验技术支持。

The CMOS APS image sensor is a novel solid image device which is developed rapidly recently, especially used in the space image systems such as the remote image, the star sensor and the solar sensor. When the CMOS APS image sensor is operated in the space or nuclear radiation environments, the radiation damage induce the dark signals increasing, the nosie increasing, and the dark signal spike generation. The radiation damage will impact the image qulity, and even induce the functional failure, which will severely threat the survival of the strategic weapens and the operation of the spacecrafts on the orbits. The correlative research is lacked in our country. With the extensive applications of the CMOS APS image sensor, the research of the radiation damage effects and the radiation hardening techniques are urgent. The experiments of the CMOS APS image sensor irradiated by the neutrons and γ rays will be carried out separately, and the experimental ruels of the displacement and the ionizing radiation damage are concluded. By combining the radiation experimental results with the transportation simulation of the radiation particles and the analysis of the theoretics, the physical mechanism of the radiation damage in the CMOS APS image sensor will be researched in depth. The physical mechanism of the displacement radiation induce the generation of the dark signal spike and the electric field enhancement effect will be demonstrated clearly. The research will provide the basis of the theories and experimental techniques for the radiation damage evaluation and hardening techniques of the CMOS APS image sensor.