A kilo-pixel imaging system for future space based far-infrared observatories using microwave kinetic inductance detectors
J. J. A. Baselmans, J. Bueno, S. J. C. Yates, O. Yurduseven, N. Llombart, K. Karatsu, A. M. Baryshev, L. Ferrari, A. Endo, D. J. Thoen, P. J. de Visser, R. M. J… 展开作者
J. J. A. Baselmans, J. Bueno, S. J. C. Yates, O. Yurduseven, N. Llombart, K. Karatsu, A. M. Baryshev, L. Ferrari, A. Endo, D. J. Thoen, P. J. de Visser, R. M. J. Janssen, V. Murugesan, E. F. C. Driessen, G. Coiffard, J. Martin-Pintado, P. Hargrave, M. Griffin
备注：
Resubmitted manuscript after review A&A (2016) 16 pages, 10 figures
Future astrophysics and cosmic microwave background space missions operating in the far-infrared to millimetre part of the spectrum will require very large arrays of ultra-sensitive detectors in combination with high multiplexing factors and efficient low-noise and low-power readout systems. We have developed a demonstrator system suitable for such applications. The system combines a 961 pixel imaging array based upon Microwave Kinetic Inductance Detectors (MKIDs) with a readout system capable of reading out all pixels simultaneously with only one readout cable pair and a single cryogenic amplifier. We evaluate, in a representative environment, the system performance in terms of sensitivity, dynamic range, optical efficiency, cosmic ray rejection, pixel-pixel crosstalk and overall yield at at an observation centre frequency of 850 GHz and 20% fractional bandwidth. The overall system has an excellent sensitivity, with an average detector sensitivity NEPdet=3x10^-19 W/rt(Hz) measured using a thermal calibration source. At a loading power per pixel of 50fW we demonstrate white, photon noise limited detector noise down to 300 mHz. The dynamic range would allow the detection of 1 Jy bright sources within the field of view without tuning the readout of the detectors. The expected dead time due to cosmic ray interactions, when operated in an L2 or a similar far-Earth orbit, is found to be <4%. Additionally, the achieved pixel yield is 83% and the crosstalk between the pixels is <-30dB. This demonstrates that MKID technology can provide multiplexing ratios on the order of a 1000 with state-of-the-art single pixel performance, and that the technology is now mature enough to be considered for future space based observatories and experiments.
In Situ Interferometric Spatial Mapping Of A Microwave Kinetic Inductance Detector Array
California Institute of Technology（加州理工学院）；Jet Propulsion Laboratory（喷气推进实验室）；Goddard Space Flight Center（戈达德太空飞行中心）；University of Washington St. Louis（华盛顿大学圣路易斯分校）
Kilopixel Performance of the Kinetic Inductance Detectors for the Terahertz Intensity Mapper
University of California, Los Angeles（加州大学洛杉矶分校）；California Institute of Technology（加州理工学院）；Jet Propulsion Laboratory, California Institute of Technology（加州理工学院喷气推进实验室）；Arizona State University（亚利桑那州立大学）
Radiation Total Dose for PRIMA: Cold Exposure with Alpha Particles
California Institute of Technology（加州理工学院）；Jet Propulsion Laboratory, California Institute of Technology（喷气推进实验室，加州理工学院）；NASA Goddard Space Flight Center（美国国家航空航天局戈达德太空飞行中心）
Multivariate Time Series Clustering for Environmental State Characterization of Ground-Based Gravitational-Wave Detectors
Computer Science \& Engineering University of California, Riverside Riverside, CA, USA；Physics University of Dallas Dallas, TX, USA；Physics \& Astronomy University of California, Riverside Riverside, CA, USA；LIGO Laboratory LIGO Livingston Observatory Livingston, LA, USA
LiteBIRD是测量宇宙微波背景辐射偏振的下一代卫星飞行任务。在大角度尺度上，宇宙微波背景的B模式偏振带有原始引力波的印记，它的精确测量将为暴胀时代提供强有力的探测。LiteBIRD的目标是实现表征张量与标量之比$r$的测量，其不确定度为$δr=0.001$。为了实现这一目标，我们将在低温冷却的亚开尔文焦平面上采用千像素超导探测器阵列，光学系统的温度为4~K。我们目前正在考虑两个探测器阵列的选择;过渡边缘传感器（TES）测辐射热计和微波动力学电感探测器（MKID）。在本文中，我们给出了一个LiteBIRD的概述，并描述了一个基于TES的偏振计设计，以实现2~ $μ$ K $\cdot$ arcmin的目标灵敏度在50至320~GHz的频率范围。
