适应南极极端环境的高性能CCD成像控制器的研究

Antarctica is the best astronomical observation site on the earth. China has carried out multiple astronomical telescopes in Antarctic. However, the temperature as low as -80 centigrade degree is an important test for the equipment operating in the Antarctic. Among them, the scientific grade CCD cameras used in the Antarctic telescopes are mostly imported commercial product, which did not get through the detailed electronic properties and stability test against extreme temperatures of the Antarctic. But the nominal operating temperature of most electronics devices are only above -40 centigrade degree, and the devices performance within low temperature will be significantly changed. Based on the design requirements of scientific CCD imaging device under extreme conditions as in Antarctic, research work of the cryoelectronic technology, low-noise CCD imaging technology and high-speed data transmission and processing technology will be processed. We want to implement a Chinese-designed high-performance CCD imaging controller system with ability of long time and stable working in the Antarctic environment, and establish a low-temperature electronics test and verification platform.

南极是地球上已知最佳的天文观测地点，我国已在南极开展了多台天文望远镜的建设工作。但是，低至-80℃的温度对工作于南极的设备提出了重要考验。其中，目前我国南极望远镜使用的科学级CCD相机多为进口商业产品，并没有针对南极的极端温度环境进行详细的电子学性能和稳定性测试，而大部分电子学器件的标称工作温度仅在-40℃以上，在低温下的性能将显著改变。本项目基于南极极端环境下科学级CCD成像设备的设计需求，开展低温电子学技术、低噪声CCD成像技术以及高速数据传输与处理技术的研究工作，拟自主设计一套适应南极环境的可长时间稳定工作的高性能CCD成像控制器系统，并建立一个低温电子学测试与验证平台。

南极是地球上已知最佳的天文观测地点，我国已在南极开展了多台天文望远镜的建设工作。但是，低至-80℃的温度对工作于南极的设备提出了重要考验。本项目基于南极极端环境下科学级CCD成像设备的设计需求，开展低温电子学技术、低噪声CCD成像技术以及高速数据传输与处理技术的研究工作。项目实现了一个低温适用的高性能CCD成像相机系统和低温测试平台，完成了对CCD相机整体结构、性能的测试。相机的最小读出噪声达到4.1个电子，制冷温差达到60摄氏度，通过光纤传输实现了低温可用的长距离2.5Gbps高速数据传输。目前，相机已在南极CSTAR2望远镜项目中得到了实际应用并取得了较好的观测效果。