2022 年升级及用于南极 CMB 观测的低频相机灵敏度提升
天体物理仪器与方法
2022-08-03 v1
摘要
利用多频宇宙微波背景(CMB)观测约束银河系前景是最终达到测量原初引力波(PGWs)灵敏度的重要步骤,原初引力波是大爆炸后暴胀的印记,将体现在 CMB 上。BICEP Array 望远镜是一组多频相机,旨在通过 CMB B 模搜寻约束暴胀的能量尺度,同时控制偏振银河系前景。最低频的 BICEP Array 接收机(BA1)自 2020 年起在南极观测,提供 30 GHz 和 40 GHz 数据以表征我们 CMB 图中的银河系同步辐射。本文中,我们介绍了 BA1 探测器的设计以及相机的完整光学表征,包括在南极的实测性能。文章还介绍了首个观测季的设计挑战,包括带外光子对探测器性能的影响。文中描述了为诊断该影响所做的测试,以及为最小化这些光子而进行的新的升级,并在 2022 年部署季安装了更多双色探测器以提升 BA1 灵敏度。我们最后报告了探测器的背景噪声测量,目标是使两个光学通道的探测器均实现光子噪声主导。BA1 相比上一部署季在制图速度上实现了提升。
引用
@article{arxiv.2208.01080,
title = {2022 Upgrade and Improved Low Frequency Camera Sensitivity for CMB Observation at the South Pole},
author = {A. Soliman and P. A. R. Ade and Z. Ahmed and M. Amiri and D. Barkats and R. Basu Thakur and C. A. Bischoff and D. Beck and J. J. Bock and V. Buza and J. Cheshire and J. Connors and J. Cornelison and M. Crumrine and A. J. Cukierman and E. V. Denison and M. I. Dierickx and L. Duband and M. Eiben and S. Fatigoni and J. P. Filippini and C. Giannakopoulos and N. Goeckner-Wald and D. C. Goldfinger and J. Grayson and P. K. Grimes and G. Hall and G. Halal and M. Halpern and E. Hand and S. A. Harrison and S. Henderson and S. R. Hildebrandt and G. C. Hilton and J. Hubmayr and H. Hui and K. D. Irwin and J. Kangh and K. S. Karkare and S. Kefeli and J. M. Kovac and C. L. Kuo and K. Lau and E. M. Leitch and A. Lennox and T. Liu and K. G. Megerian and L. Minutolo and L. Moncelsi and Y. Nakato and T. Namikawa and H. T. Nguyen and R. O'Brient and S. Palladino and M. A. Petroff and N. Precup and T. Prouve and C. Pryke and B. Racine and C. D. Reintsema and M. Salatino and A. Schillaci and B. L. Schmitt and B. Singari and T. St. Germaine and B. Steinbach and R. V. Sudiwala and K. L. Thompson and C. Tsai and C. Tucker and A. D. Turner and C. Umiltà and C. Vergès and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert and W. L. K. Wu and H. Yang and K. W. Yoon and E. Young and C. Yu and L. Zeng and C. Zhang and S. Zhang},
journal= {arXiv preprint arXiv:2208.01080},
year = {2022}
}
备注
Proceedings of SPIE Astronomical Telescopes + Instrumentation 2022 (AS22)