Current Status of the Ali CMB Polarization Telescope Focal Plane Camera
| Autor: | Jordi A. Montana-Lopez, Yi-Han Wu, Xiran Bai, Maria Salatino, Adrian Sinclair, Hamdi Mani, Bradley Dober, X. Zhang, Ki Won Yoon, Jeremy Meinke, Shannon M. Duff, Ryan Stephenson, Joel N. Ullom, Jason E. Austermann, Jeff Van Lanen, John A. B. Mates, Johannes Hubmayr, Richard C. Givhan, Chao-Lin Kuo, Eric Weeks, Samantha Walker, Keith L. Thompson, Gene C. Hilton, Jake Connors, E. Karpel, Justin Mathewson, James A. Beall, Philip Daniel Mauskopf |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Physics::Instrumentation and Detectors business.industry Bolometer Cosmic microwave background Astrophysics::Instrumentation and Methods for Astrophysics Polarimeter Optical polarization Astrophysics::Cosmology and Extragalactic Astrophysics Condensed Matter Physics Dichroic glass Electronic Optical and Magnetic Materials law.invention Telescope Cardinal point Optics law Electrical and Electronic Engineering Transition edge sensor business |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 31:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2021.3065289 |
| Popis: | 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%. |
| Databáze: | OpenAIRE |
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