Mid-infrared detector arrays operating from 2.8 to 20 μm are baselined in the design of the Origins Space Telescope Mid-Infrared Spectrometer Instrument. This instrument is designed to detect and measure the spectral signatures of gases of biogenic origin in the atmospheres of exoplanets as they transit their host stars. In order to make these detections, the detector array’s pixels need to have high-signal stability when exposed to a constant flux in multiple time-series integration over a typical transit time of a few hours. With the use of a densified pupil spectrometer design, pointing effects can be mitigated because pointing variations do not displace spectra on the detector and each wavelength of light is averaged over a large number of pixels, giving good spectrophotometric stabilities. The current state-of-the-art detector arrays do not achieve these stabilities, although with a feasible development program this level of performance should be achievable. Three detector technologies are under consideration for this development, HgCdTe arrays, Si:As impurity band conduction arrays, and transition edge superconductor bolometer arrays. We primarily treat the HgCdTe technology development, but also introduce the paths forward for the other two technologies. After a few years-long investigative programs, a down-select will be undertaken to select the flight technology.

中文翻译：

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起源太空望远镜的中红外探测器开发

在Origins空间望远镜中红外光谱仪仪器的设计中，以工作于2.8至20μm的中红外探测器阵列为基线。该仪器旨在检测和测量系外行星大气中通过其宿主恒星时生物源性气体的光谱特征。为了进行这些检测，当检测器阵列的像素在几个小时的典型传输时间内经历多个时间序列积分中的恒定通量时，需要具有高信号稳定性。通过使用致密的瞳孔光谱仪设计，可以减轻指向效果，因为指向变化不会使检测器上的光谱发生位移，并且每个波长的光在大量像素上进行平均，从而提供了良好的分光光度稳定性。当前的最新探测器阵列无法实现这些稳定性，尽管使用可行的开发程序，也应该可以达到这一性能水平。HgCdTe阵列，Si：As杂质带传导阵列和过渡边缘超导体辐射热计阵列等三种检测器技术正在考虑中。我们主要介绍HgCdTe技术的发展，但也介绍了其他两种技术的发展方向。经过数年的调查计划，将进行向下选择以选择飞行技术。和过渡边缘超导体辐射热计阵列。我们主要介绍HgCdTe技术的发展，但也介绍了其他两种技术的发展方向。经过数年的调查计划，将进行向下选择以选择飞行技术。和过渡边缘超导体辐射热计阵列。我们主要介绍HgCdTe技术的发展，但也介绍了其他两种技术的发展方向。经过数年的调查计划，将进行向下选择以选择飞行技术。