| 分置式斯特林制冷机耦合间隙对探测器性能的影响 |
| 投稿时间：2023-07-25 修订日期：2023-10-11 点此下载全文 |
| 引用本文：李振雷,谢萌,饶启超,韩蓬磊.分置式斯特林制冷机耦合间隙对探测器性能的影响[J].红外,2024,45(6):42~47 |
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| 中文摘要:分置式斯特林制冷机作为红外探测器组件的重要组成部分，在实际应用中对红外探测器组件的性能影响较大。其中，分置式斯特林制冷机与杜瓦耦合时的耦合间隙是对红外探测器组件的性能影响最大的因素之一。因此针对二者的耦合间隙对探测器性能的影响进行了实验研究。当芯片温度为75 K且制冷机的冷头温度为70 K时，模拟仿真冷指与杜瓦的变形量，耦合间隙变形为0.0096 mm。低温环境对制冷机冷指与杜瓦变形的影响较小，可以忽略冷指与杜瓦变形对耦合间隙的影响。实验结果表明，红外探测器组件的降温时间随耦合间隙的增大而逐渐增大。随着时间的逐渐增大，不同耦合间隙对应的直流电流也各不相同。同一时刻下，耦合间隙越小，直流电流就越小。二极管电压随时间的增加呈现出逐渐增大并逐渐平稳的状态。在达到控温状态前，同一时刻下，耦合间隙越小，二极管电压越大。 |
| 中文关键词:分置式斯特林制冷机 耦合间隙 降温时间 直流电流 二极管电压 |
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| The Influence on Detector Performance of Coupling Gap in Split Stirling Cryocooler |
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| Abstract:As an important part of infrared detector assembly, split Stirling refrigerator has great influence on the performance of infrared detector assembly in practical application. Among them, the coupling gap between dewar and Stirling refrigerator is one of the most important factors affecting the performance of infrared detector. Therefore, the effect of the coupling gap on the performance of infrared detector is studied experimentally in this paper. When the chip temperature is 75 K and the cold head temperature of the refrigerator is 70 K, the deformation of the cold finger and dewar is simulated, and the coupling gap deformation is 0.0096 mm. The low temperature environment has little influence on the deformation of the cold finger and dewar of the refrigerator, and the influence of the deformation of the cold finger and dewar on the coupling gap can be ignored. The experimental results show that the cooling time of the infrared detector module increases with the increase of the coupling gap. With the gradual increase of time, the corresponding DC currents of different coupling gaps are also different. At the same time, the smaller the coupling gap is, the smaller the DC current is. The diode voltage gradually increases and becomes stable with the increase of time. Before reaching the temperature control state, the smaller the coupling gap is at the same time, the larger the diode voltage is. |
| keywords:split Stirling cryocooler coupling gap cooling time DC current diode voltage |
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