2016至2019年Keck阵列与BICEP3 CMB偏振计的光学表征
天体物理仪器与方法
2020-05-13 v1 星系天体物理
摘要
BICEP/Keck实验（BK）是一系列小口径折射望远镜，从南极观测角尺度宇宙微波背景（CMB）偏振以寻找原初模信号。该模信号源于原初引力波与CMB的相互作用，其振幅由张量-标量比参数化。自2016年以来，BICEP3与Keck阵列一直以总计4800个天线耦合过渡边缘传感器探测器进行观测，频带覆盖95、150、220和270 GHz。在此我们给出这些接收机2016至2019年的光学性能，包括用改进的分束热源原位测量的远场波束，以及用可现场部署的傅里叶变换光谱仪测量的仪器光谱响应。作为一对差分实验，必须控制的一个重要系统误差是共址、正交偏振探测器之间的差分波束响应。我们生成逐探测器远场波束图及相应的差分波束失配，用于估计CMB图中温度到偏振的泄漏，并反馈于探测器与光学制造。此处给出的差分波束参数是使用改进的低层波束图分析技术估计的，包括高效去除非高斯噪声以及改进的空间掩蔽。这些技术有助于最小化波束分析中的系统不确定性，目标是将温度到偏振泄漏引起的对的偏置约束为低于统计不确定性。这对于我们在下一代CMB实验中迈向更高探测器数量是至关重要的。
引用
@article{arxiv.2002.05197,
title = {Optical characterization of the Keck Array and BICEP3 CMB Polarimeters from 2016 to 2019},
author = {Keck Collaboration and T. St Germaine and P. A. R. Ade and Z. Ahmed and M. Amiri and D. Barkats and R. Basu Thakur and C. A. Bischoff and J. J. Bock and H. Boenish and E. Bullock and V. Buza and J. Cheshire and J. Connors and J. Cornelison and M. Crumrine and A. Cukierman and M. Dierickx and L. Duband and S. Fatigoni and J. P. Filippini and S. Fliescher and J. A. Grayson and G. Hall and M. Halpern and S. Harrison and S. R. Hildebrandt and G. C. Hilton and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and E. Karpel and S. Kefeli and S. A. Kernasovskiy and J. M. Kovac and C. L. Kuo and K. Lau and E. M. Leitch and K. G. Megerian and L. Moncelsi and T. Namikawa and C. B. Netterfield and H. T. Nguyen and R. O'Brient and R. W. Ogburn and S. Palladino and C. Pryke and B. Racine and C. D. Reintsema and S. Richter and A. Schillaci and R. Schwarz and C. D. Sheehy and A. Soliman and B. Steinbach and R. V. Sudiwala and K. L. Thompson and J. E. Tolan and C. Tucker and A. D. Turner and C. Umilta and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert and C. L. Wong and W. L. K. Wu and E. Yang and K. W. Yoon and E. Young and C. Yu and C. Zhang},
journal= {arXiv preprint arXiv:2002.05197},
year = {2020}
}
备注
8 pages, 3 figures. Accepted by the Journal of Low Temperature Physics (Proceedings of the 18th International Workshop on Low Temperature Detectors)