The design of the Ali CMB Polarization Telescope receiver
Abstract
Ali CMB Polarization Telescope (AliCPT-1) is the first CMB degree-scale polarimeter to be deployed on the Tibetan plateau at 5,250m above sea level. AliCPT-1 is a 90/150 GHz 72 cm aperture, two-lens refracting telescope cooled down to 4 K. Alumina lenses, 800mm in diameter, image the CMB in a 33.4{\deg} field of view on a 636mm wide focal plane. The modularized focal plane consists of dichroic polarization-sensitive Transition-Edge Sensors (TESes). Each module includes 1,704 optically active TESes fabricated on a 150mm diameter silicon wafer. Each TES array is read out with a microwave multiplexing readout system capable of a multiplexing factor up to 2,048. Such a large multiplexing factor has allowed the practical deployment of tens of thousands of detectors, enabling the design of a receiver that can operate up to 19 TES arrays for a total of 32,376 TESes. AliCPT-1 leverages the technological advancements in the detector design from multiple generations of previously successful feedhorn-coupled polarimeters, and in the instrument design from BICEP-3, but applied on a larger scale. The cryostat receiver is currently under integration and testing. During the first deployment year, the focal plane will be populated with up to 4 TES arrays. Further TES arrays will be deployed in the following years, fully populating the focal plane with 19 arrays on the fourth deployment year. Here we present the AliCPT-1 receiver design, and how the design has been optimized to meet the experimental requirements.
Keywords
Cite
@article{arxiv.2101.09608,
title = {The design of the Ali CMB Polarization Telescope receiver},
author = {Maria Salatino and Jason E. Austermann and Keith L. Thompson and Peter A. R. Ade and Xiran Bai and James A. Beall and Dan T. Becker and Yifu Cai and Zhi Chang and Ding Chen and Pisin Chen and Jake Connors and Jacques Delabrouille and Bradley Dober and Shannon M. Duff and Guanhua Gao and Shamik Ghosh and Richard C. Givhan and Gene C. Hilton and Bin Hu and Johannes Hubmayr and Ethan D. Karpel and Chao-Lin Kuo and Hong Li and Mingzhe Li and Si-Yu Li and Xufang Li and Yongping Li and Michael Link and Hao Liu and Liyong Liu and Yang Liu and Fangjun Lu and Xuefeng Lu and Tammy Lukas and John A. B. Mates and Justin Mathewson and Philip Mauskopf and Jeremy Meinke and Jordi A. Montana-Lopez and Jenna Moore and Jingyan Shi and Adrian K. Sinclair and Ryan Stephenson and Weishin Sun and Yu-Han Tseng and Carole Tucker and Joel N. Ullom and Leila R. Vale and Jeff van Lanen and Michael R. Vissers and Samantha Walker and Bo Wang and Guofeng Wang and Jiaxin Wang and Erik Weeks and Di Wu and Yi-Han Wu and Junqing Xia and He Xu and Ji Yao and Yongqiang Yao and Ki Won Yoon and Bin Yue and Hua Zhai and Aimei Zhang and Laiyu Zhang and Le Zhang and Pengjie Zhang and Tong Zhang and Xinmin Zhang and Yifei Zhang and Yongjie Zhang and Gong-Bo Zhao and Wen Zhao},
journal= {arXiv preprint arXiv:2101.09608},
year = {2021}
}
Comments
Proc. SPIE, 11453, 114532A (2020)