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宽谱段高分辨率低温成像光谱仪可对星际矿物成分、大气成分进行有效识别,但由于深空探测目标温度很低,为了抑制光谱仪自身噪声,提高分辨率,需要红外谱段工作在几十K的低温环境下,这对制冷系统设计提出了严峻的挑战。在调研国外用于金星、彗星探测的可见/红外成像光谱仪(VIRTIS)制冷技术的基础上,对宽谱段高分辨率低温成像光谱仪制冷系统进行了设计与仿真分析,仿真结果显示M和H探测器部件温度梯度非常小,约为4×10-2 K;探测器工作温度≤70 K;M和H部件壳体温度为130±1 K;框架温度为200±1 K,符合制冷系统设计要求。研究成果对在深空探测领域具有通用性的低温高光谱成像系统中制冷系统的研制具有一定的指导意义。
Wide-band high-resolution cryogenic imaging spectrometer can effectively identify the composition of interstellar minerals and atmospheric components. However, due to the low target temperature of deep-space exploration, in order to restrain the spectrometer’s own noise and improve the resolution, Of the low temperature environment, which presents a serious challenge to the design of refrigeration system. Based on the investigation of VIRTIS refrigeration technology used abroad for Venus and Comet detection, the design and simulation of the refrigeration system for the wide-band high-resolution low-temperature imaging spectrometer have been carried out. The simulation results show that M and H detection The temperature gradient of the components is very small, about 4 × 10-2 K; the working temperature of the detector is ≤70 K; the temperature of the housing of M and H components is 130 ± 1 K; the temperature of the frame is 200 ± 1 K, which meets the design requirements of refrigeration system . The research results are of guiding significance to the development of refrigeration system in the low-temperature hyperspectral imaging system that is universal in deep space exploration.