首台 BICEP Array 接收机的设计与性能
天体物理仪器与方法
2020-02-14 v1 宇宙学与河外天体物理
摘要
宇宙暴胀模型的若干分支（如慢滚暴胀）预言了原初引力波背景，其在宇宙微波背景（CMB）中印刻出独特的奇宇称 B 模图样，其幅度处于实验可探测范围内。BICEP/Keck（BK）实验通过南极异常洁净且稳定的大气观测偏振微波天空，以探测这一由原初张量-标量比 r 参数化的原初信号。B 模测量需要一台具有极高灵敏度、严格控制系统误差且具备宽频覆盖的仪器，以将原初信号与银河系前景辐射区分开来。BICEP Array 代表了 BK 计划的最新阶段，包含四台 BICEP3 级别的接收机，分别观测 30/40、95、150 和 220/270 GHz。30/40 GHz 接收机将于 2019/2020 年南极夏季部署于南极。在经过 3 整年、30,000 多个探测器的观测后，BICEP Array 将把原初引力波测量精度 提升至 0.002 至 0.004 之间，具体取决于前景复杂度和透镜化去除程度。本文概述该仪器，重点介绍低温、磁屏蔽、探测器与读出架构方面的设计特征，并报告首台 30/40 GHz 接收机正在进行的集成与测试。
引用
@article{arxiv.2002.05228,
title = {Design and performance of the first BICEP Array receiver},
author = {A. Schillaci 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 G. Hall and M. Halpern and S. Harrison and S. Henderson 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 J. M. Kovac and C. L. Kuo and K. Lau and K. G. Megerian and L. Moncelsi and T. Namikawa and H. T. Nguyen and R. O'Brient and S. Palladino and N. Precup and T. Prouvé and C. Pryke and B. Racine and C. D. Reintsema and S. Richter and B. Schmitt and R. Schwarz and C. D. Sheehy and A. Soliman and T. St. Germaine and B. Steinbach and R. V. Sudiwala and K. L. Thompson and C. Tucker and A. D. Turner and C. Umiltà and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert 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:2002.05228},
year = {2020}
}
备注
9 pages, 5 figures, presented at LTD18 in Milan (July 2019), accepted on JLTP (February 2020)