Performance evaluation, readout modes, and calibration techniques of HgCdTe Hawaii-2RG mosaic arrays
Performance evaluation, readout modes, and calibration techniques of HgCdTe Hawaii-2RG mosaic arrays
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HgCdTe Hawaii-2RG 镶嵌阵列的性能评估、读出模式和校准技术
DOI：
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发表时间：
2008
期刊：
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通讯作者：
J. Stegmeier
中科院分区：
文献类型：
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作者：
G. Finger;R. Dorn;Siegfried Eschbaumer;D. Hall;L. Mehrgan;M. Meyer;J. Stegmeier
最近，ESO委托了HAWK-I相机，该相机配备了λc~ 2.5µm HAWAII-2RG阵列2×2马赛克。该阵列具有较高的量子效率，在望远镜上实现了限制光子散粒噪声的性能。使用参考像素可以显示，大多数阵列的读出噪声受MBE生长的HgCdTe材料的限制，而不是受多路复用器或数据采集链的限制。本文将介绍利用HAWAII-2RG多路复用器的导窗获得的结果。将讨论探测器衬底中的通道间串扰和条纹。将阈值有限积分（TLI）应用于随坡非破坏性采样方案，可以扩大检测器的动态范围。本文将讨论一种基于Fe55 x射线发射的基板移除阵列校准技术。
Recently ESO has commissioned the HAWK-I camera which is equipped with a 2×2 mosaic of λc~ 2.5 µm HAWAII-2RG arrays. The arrays have high quantum efficiency and achieve photon shot noise limited performance on the telescope. Using reference pixels it can be shown that the readout noise for most arrays is limited by the MBE grown HgCdTe material and not by the multiplexer or the data acquisition chain. Results obtained with the guide window of the HAWAII-2RG multiplexer will be presented. Inter-channel crosstalk and fringing in the detector substrate will be discussed. The dynamic range of detectors can be expanded by applying threshold limited integration (TLI) to the follow-up-the-ramp nondestructive sampling scheme. For substrate removed arrays a calibration technique based on the X-ray emission of Fe55 will be discussed.