학술논문
Current Status of the Ali CMB Polarization Telescope Focal Plane Camera
Document Type
Periodical
Author
Salatino, M.; Austermann, J.; Meinke, J.; Sinclair, A.K.; Walker, S.; Bai, X.; Beall, J.; Connors, J.; Dober, B.; Duff, S.M.; Givhan, R.C.; Hilton, G.; Hubmayr, J.; Karpel, E.D.; Kuo, C.; Mani, H.; Mates, J.A.; Mathewson, J.; Mauskopf, P.; Montana-Lopez, J.A.; Stephenson, R.; Thompson, K.L.; Ullom, J.; van Lanen, J.; Yoon, K.W.; Weeks, E.L.; Wu, Y.; Zhang, X.
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 31(5):1-5 Aug, 2021
Subject
Language
ISSN
1051-8223
1558-2515
2378-7074
1558-2515
2378-7074
Abstract
Ali CMB Polarization Telescope (AliCPT) is the first Cosmic Microwave Background (CMB) polarimeter with a large focal plane camera to be deployed in the Northern Hemisphere, in the Tibetan Plateau. Here we present the design of a dichroic (90/150 GHz) focal plane camera capable of hosting up to 32,376 Transition-Edge Sensor (TES) bolometers operating from a base temperature of 280 mK. Detectors are fabricated as monolithic arrays of 1,704 feedhorn-coupled and polarization-sensitive TES bolometers that are packaged in independent modules and read out with a microwave multiplexing architecture. A custom RFSoC-based system manages the multiplexing readout. Prototype AliCPT pixels have been fabricated and characterized, demonstrating passband performance within 2.5% of design and cross-polarization systematic sensitivity $\leq$2%.