超长线列红外探测器杜瓦真空寿命评估方法  

Evaluation method of vacuum life for long linear IRFPA Dewar assembly

作　　者：李俊[1,2,3] 王小坤 张磊[1,2] 孙闻[1,2] 曾智江[1,2,3] 龚海梅[1,2] LI Jun;WANGXiao- kun;ZHANGLei;SUNWen;ZENGZhi- jiang;GONGHai-mei(State Key Laboratories of Transducer Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海技术物理研究所传感技术国家重点实验室,上海200083 [2]中国科学院上海技术物理研究所红外成像材料与器件重点实验室,上海200083 [3]中国科学院大学,北京100049

出　　处：《激光与红外》2018年第7期854-859,共6页Laser & Infrared

基　　金：国家自然科学基金项目(No.61475179);中国科学院青年创新促进会基金项目(No.2014215)资助

摘　　要：针对超长线列红外探测器杜瓦具有容积大、零部件种类多、材料放气源多,特别是集成式超长线列杜瓦与内充3 MPa高压氦气的直线脉管冷指封装集成等特点,基于材料解析放气及渗透理论,建立了超长线列杜瓦组件真空寿命评估模型,对分置式与集成式超长线列杜瓦的真空寿命进行了计算,其真空寿命预计值均可以达到2年。设计了一种杜瓦真空度在线监测结构对这两类杜瓦的真空度进行了实时监测,分置式及集成式杜瓦真空寿命预计值与实测值相对误差分别为5.8%和6.96%。因集成式杜瓦真空寿命估算较为困难,对其热负载通过制冷性能进行实验验证,其热负载2年后未发生明显变化。According to the characteristics of the Dewar for long linear Hg Cd Te IRFPA detector with the large volume,many kinds of parts and the deflated sources of the different materials,especially integrated with the inline pulse tube filled with the 3 MPa high-pressure helium,based on the material analysis of gas diffusion and infiltration theory,the vacuum life estimation model for the long linear FPA Dewar assembly was established.The vacuum lives of the splittype and integrated long linear FPA Dewar were calculated and predicted values of the vacuum lives are both more than 2 years.The online monitoring structure for Dewar vacuum degree was designed to monitor the vacuum of these two types of Dewar for a long period of time.The predicted results were compared with the measured value,the relative error of split Dewar is 5.8% and the other is 6.96%.Because the integrated Dewar vacuum is difficult to estimate,so it＇s thermal performance is verified by the tests of the cooling performance,and there is no obvious change in the thermal load of the integrated Dewar.

关 键 词：超长线列红外探测器 分置式与集成式超长线列杜瓦 真空寿命评估 

分 类 号：TN215[电子电信—物理电子学] TB65[一般工业技术—制冷工程]