Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole
Abstract
A detection of curl-type (-mode) polarization of the primary CMB would be direct evidence for the inflationary paradigm of the origin of the Universe. The BICEP/Keck Array (BK) program targets the degree angular scales, where the power from primordial -mode polarization is expected to peak, with ever-increasing sensitivity and has published the most stringent constraints on inflation to date. BICEP Array (BA) is the Stage-3 instrument of the BK program and will comprise four BICEP3-class receivers observing at 30/40, 95, 150 and 220/270 GHz with a combined 32,000+ detectors; such wide frequency coverage is necessary for control of the Galactic foregrounds, which also produce degree-scale -mode signal. The 30/40 GHz receiver is designed to constrain the synchrotron foreground and has begun observing at the South Pole in early 2020. By the end of a 3-year observing campaign, the full BICEP Array instrument is projected to reach between 0.002 and 0.004, depending on foreground complexity and degree of removal of -modes due to gravitational lensing (delensing). This paper presents an overview of the design, measured on-sky performance and calibration of the first BA receiver. We also give a preview of the added complexity in the time-domain multiplexed readout of the 7,776-detector 150 GHz receiver.
Cite
@article{arxiv.2012.04047,
title = {Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole},
author = {L. Moncelsi 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 V. Buza and J. Cheshire and J. Connors and J. Cornelison and M. Crumrine and A. Cukierman and E. V. Denison and M. Dierickx and L. Duband and M. Eiben and S. Fatigoni and J. P. Filippini and N. Goeckner-Wald and D. C. Goldfinger and J. Grayson and P. Grimes and G. Hall and M. Halpern and S. Harrison and S. Henderson and S. R. Hildebrandt and G. C. Hilton and J. Hubmayr and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and S. Kefeli and J. M. Kovac and C. L. Kuo and K. Lau and E. M. Leitch and K. G. Megerian and L. Minutolo and Y. Nakato and T. Namikawa and H. T. Nguyen and R. O'Brient and S. Palladino and N. Precup and T. Prouve and C. Pryke and B. Racine and C. D. Reintsema and A. Schillaci and B. L. Schmitt 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 L. Zeng and C. Zhang and S. Zhang},
journal= {arXiv preprint arXiv:2012.04047},
year = {2020}
}
Comments
Proceedings of SPIE 2020 (AS111). This article supersedes arXiv:1808.00568 and arXiv:2002.05228