密歇根红外测试热ELT N波段（MITTEN）低温恒温器
The Michigan Infrared Test Thermal ELT N-band (MITTEN) Cryostat
摘要：
我们介绍Michigan Infrared Test Thermal ELT N-band（MITTEN）Cryostat，这是一种用于测试红外探测器的新设备，重点是中红外（MIR）波长（8-13微米）。新一代的大幅面、深井、快速读出的MIR探测器现在正向天文界提供。作为一个例子，Teledyne成像传感器（TIS）已经引入了长波汞-镉-碲化物（MCT）阵列GeoSnap，与上一代Si：As阻挡杂质带（BIB）探测器相比，其具有高量子效率（> 65%）和改进的噪声特性。GeoSnap有望提高未来背景有限的MIR仪器的灵敏度和效率，特别是未来的超大望远镜（ELT）。我们描述了我们的新的测试设施，适合测量这些探测器的特性，如读取噪声，暗电流，线性度，增益，像素的可操作性，量子效率，和点源相对于背景场景的成像性能，以及不同对比度的多个点源。MITTEN有一个内部光源，很快就有一个附带的滤光轮和孔径板，使用Offner中继器重新成像到探测器上。低温恒温器内部的基线温度保持在< 40 K，光学工作台使用来自Cryomech的两级脉冲管低温冷却器包保持16 K的温度。尚未检测到来自低温恒温器内部的可测量的背景辐射。
英文摘要：
We introduce the Michigan Infrared Test Thermal ELT N-band (MITTEN) Cryostat, a new facility for testing infrared detectors with a focus on mid-infrared (MIR) wavelengths (8-13 microns). New generations of large format, deep well, fast readout MIR detectors are now becoming available to the astronomical community. As one example, Teledyne Imaging Sensors (TIS) has introduced a long-wave Mercury-Cadmium-Telluride (MCT) array, GeoSnap, with high quantum efficiency (> 65 %) and improved noise properties compared to previous generation Si:As blocked impurity band (BIB) detectors. GeoSnap promises improved sensitivities, and efficiencies, for future background-limited MIR instruments, in particular with future extremely large telescopes (ELTs). We describe our new test facility suitable for measuring characteristics of these detectors, such as read noise, dark current, linearity, gain, pixel operability, quantum efficiency, and point source imaging performance relative to a background scene, as well as multiple point sources of differing contrast. MITTEN has an internal light source, and soon an accompanying filter wheel and aperture plate, reimaged onto the detector using an Offner relay. The baseline temperature of the cryostat interior is maintained < 40 K and the optical bench maintains a temperature of 16 K using a two-stage pulse-tube cryocooler package from Cryomech. No measurable background radiation from the cryostat interior has yet been detected.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
