南极 BICEP3 CMB 偏振计的光学特性
天体物理仪器与方法
2017-01-18 v1 宇宙学与河外天体物理
摘要
BICEP3 是一台小孔径折射式宇宙微波背景（CMB）望远镜，旨在通过制作高灵敏度的偏振图来探测来自暴胀引力波的潜在 B 模信号。它是南极 BICEP/Keck Array 系列 CMB 实验的最新成员，该系列迄今已提供了对暴胀的最严格限制。在 2016 年观测季，BICEP3 配备了全套 2400 个在 95 GHz 下工作的光学耦合探测器。在本文中，我们利用 2015-2016 年夏季部署期间使用热斩波源在现场获取的校准数据，报告了其远场波束性能。我们生成了高保真的单探测器波束图，展示了阵列平均波束轮廓，并表征了共置的正交偏振探测器之间的差分波束响应，该响应是成对差分实验中主要的仪器系统误差来源。我们发现，差分指向、波束宽度和椭圆率的水平与 BICEP2 和 Keck Array 的测量值相似或更低。BICEP3 差分波束失配的幅度与分布，以及在分析中温度到偏振泄漏可被边缘化或扣除的程度，将为配备数以千计探测器的下一代 CMB 实验的设计提供参考。
引用
@article{arxiv.1607.04567,
title = {Optical Characterization of the BICEP3 CMB Polarimeter at the South Pole},
author = {K. S. Karkare and P. A. R. Ade and Z. Ahmed and K. D. Alexander and M. Amiri and D. Barkats and S. J. Benton and C. A. Bischoff and J. J. Bock and H. Boenish and R. Bowens-Rubin and I. Buder and E. Bullock and V. Buza and J. Connors and J. P. Filippini and S. T. Fliescher and J. A. Grayson and M. Halpern and S. A. Harrison and G. C. Hilton and V. V. Hristov and H. Hui and K. D. Irwin and J. H. Kang and E. Karpel and S. Kefeli and S. A. Kernasovskiy and J. M. Kovac and C. L. Kuo and E. M. Leitch and M. Lueker and K. G. Megerian and V. Monticue and T. Namikawa and C. B. Netterfield and H. T. Nguyen and R. O'Brient and R. W. Ogburn and C. Pryke and C. D. Reintsema and S. Richter and M. T. St. Germaine and R. Schwarz and C. D. Sheehy and Z. K. Staniszewski and B. Steinbach and G. P. Teply and K. L. Thompson and J. E. Tolan and C. Tucker and A. D. Turner and A. G. Vieregg and A. Wandui and A. Weber and J. Willmert and C. L. Wong and W. L. K. Wu and K. W. Yoon},
journal= {arXiv preprint arXiv:1607.04567},
year = {2017}
}
备注
17 pages, 9 figures. Presented at SPIE Astronomical Telescopes and Instrumentation Conference 9914: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, June 2016