The mercury–cadmium–tellurium (MCT) sensors are considered the ideal infrared detectors to equip the focal plane arrays (FPAs) of astronomical scientific missions. To tackle Europe to be self-sufficient on this technology and promote to reach the same maturity level attained by the current MCT sensors market leaders, the Astronomy European Infrared Detector (ASTEROID) project aims to provide Europe with the capability to manufacture high-performance infrared FPAs devoted to scientific use, space astronomy, and ground-based telescope infrastructures. The resulting detector will be a hybridized MCT array with a CdZnTe substrate of 2k $\times2\text{k}$ pixels and 15 $\mu \text{m}$ of pixel pitch. The Institut de Física d’Altes Energies (IFAE) will lead the task to validate the detector performance with respect to the hybridization reliability between the readout integrated circuit (ROIC) and the MCT detector by submitting it to several low-temperature thermal cycles. After every thermal stress, the detector will be optically characterized in order to measure any performance degradation and possible problems with the pixel operability. To perform such tasks, two custom setups, focused on optical and cryo-vacuum aspects, were developed, which, used in conjunction, allows to cool down the detector from the room temperature up to ~30 K, while it is electro-optically characterized in terms of linearity, gain, quantum efficiency, and cosmetics defects, among others. The whole cryo-vacuum system and the optical setup are fully described in this article as part of the work packages assigned to IFAE to test the hybridized detector to assess the reliability at operating temperature and after several thermal cycles.

中文翻译：

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集成用于地面和天基天文学中使用的近红外探测器的光学和热表征的测试台

汞-镉-碲（MCT）传感器被认为是装备天文科学任务焦平面阵列（FPA）的理想红外探测器。为了让欧洲在这项技术上自给自足并促进达到与当前 MCT 传感器市场领导者相同的成熟度，天文欧洲红外探测器 (ASTEROID) 项目旨在为欧洲提供制造高性能红外探测器的能力致力于科学用途、空间天文学和地面望远镜基础设施的 FPA。由此产生的探测器将是一个混合的 MCT 阵列，具有 2k $\times2\text{k}$ 像素和 15 $\mu \text{m}$ 像素间距的 CdZnTe 衬底。Institut de Física d'Altes Energies (IFAE) 将领导这项任务，通过将其提交给几个低温热循环来验证与读出集成电路 (ROIC) 和 MCT 探测器之间的杂交可靠性相关的探测器性能。在每次热应力之后，探测器都会进行光学表征，以测量任何性能下降和像素可操作性可能出现的问题。为了执行这些任务，开发了两种专注于光学和低温真空方面的定制设置，结合使用，可以将探测器从室温冷却到~30 K，同时进行电光表征在线性度、增益、量子效率和外观缺陷等方面。