The design of the Ali CMB Polarization Telescope receiver
Maria Salatino, Jason Austermann, Keith L. Thompson, Peter Ade, Xiran Bai, James Beall, Dan Becker, Yifu Cai, Zhi Chang, Ding Chen, Jake Connors, Pisin Chen, Bradley Dober, Jacques Delabrouille, Shannon Duff, Guanhua Gao, Richard Givhan, Shamik Ghosh, Gene Hilton, Bin Hu, Johannes Hubmayr, Ethan Karpel, Chao-Lin Kuo, Hong Li, Mingzhe Li, Si-Yu Li, Xufang Li, Michael Link, Yongping Li, Hao Liu, Liyong Liu, Yang Liu, Fangjun Lu, Tammy Lukas, Xuefeng Lu, John Mates, Justin Mathewson, Philip Mauskopf, Jeremy Meinke, Jordi Montana-Lopez, Jingyan Shi, Adrian Sinclair, Ryan Stephenson, Weishin Sun, Yu‐Han Tseng, Carole Tucker, Joel Ullom, Leila Vale, Jeff van Lanen, Michael Vissers, Samantha Walker, Bo Wang, Guofeng Wang, Jiaxin Wang, Eric Weeks, Di Wu, Yi-Han Wu, Junqing Xia, He Xu, Ji Yao, Yongqiang Yao, Ki Won Yoon, Bin Yue, Hua Zhai, Aimei Zhang, Laiyu Zhang, Le Zhang, Pengjie Zhang, Tong Zhang, Xinmin Zhang, Yifei Zhang, Yongjie Zhang, Gong-Bo Zhao, Wen Zhao
Abstract
<strong>Publisher’s Note</strong>: This paper, originally published on 22 December 2020, was replaced with a corrected/revised version on 12 March 2021. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance. AliCPT-1 is the first CMB degree scale polarimeter to be deployed to the Tibetan plateau at 5,250m asl. AliCPT-1 is a 95/150GHz 72cm aperture, two lens refracting telescope cooled down to 4K. Alumina lenses image the CMB 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 6in Silicon wafer. Each TES array is read out with a microwave multiplexing with a multiplexing factor up to 2,000. Such large factor has allowed to consider 10's of thousands of detectors in a practical way, enabling to design a receiver that can operate up to 19 TES arrays for a total of 32,300 TESes. AliCPT-1 leverages the technological advancements of AdvACT and BICEP-3. The cryostat receiver is currently under integration and testing. Here we present the AliCPT-1 receiver, underlying how the optimized design meets the experimental requirements.