部署级SuperSpec毫米波片上光谱仪的全阵列噪声性能
Full-Array Noise Performance of Deployment-Grade SuperSpec mm-wave On-Chip Spectrometers
摘要：
SuperSpec是一款片上滤波器组光谱仪，采用TiN动态电感探测器，设计用于毫米波长的宽带中等分辨率光谱。SuperSpec技术将使大型光谱积分场单元适用于高红移线强度测绘和多目标光谱仪。在以前的结果中，我们已经证明了在个别探测器的噪声性能适合于光子噪声有限的地基观测在优秀的毫米波网站。在这些程序中，我们提出了一个完整的$R\sim 275$频谱仪使用部署就绪的RF硬件和软件测量的噪声性能。我们报告了典型的噪声等效功率通过整个设备的$\sim 3 \times 10^{-16} \ \mathrm{W}/\sqrt{\mathrm{Hz}}$在预期的天空负载，这是光子噪声为主。基于这些结果，我们计划在2020年初为大型毫米波望远镜部署一个六光谱仪演示仪器。
英文摘要：
SuperSpec is an on-chip filter-bank spectrometer designed for wideband moderate-resolution spectroscopy at millimeter wavelengths, employing TiN kinetic inductance detectors. SuperSpec technology will enable large-format spectroscopic integral field units suitable for high-redshift line intensity mapping and multi-object spectrographs. In previous results we have demonstrated noise performance in individual detectors suitable for photon noise limited ground-based observations at excellent mm-wave sites. In these proceedings we present the noise performance of a full $R\sim 275$ spectrometer measured using deployment-ready RF hardware and software. We report typical noise equivalent powers through the full device of $\sim 3 \times 10^{-16} \ \mathrm{W}/\sqrt{\mathrm{Hz}}$ at expected sky loadings, which are photon noise dominated. Based on these results, we plan to deploy a six-spectrometer demonstration instrument to the Large Millimeter Telescope in early 2020.
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