1. Current Status of the Ali CMB Polarization Telescope Focal Plane Camera.
- Author
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Salatino, Maria, Austermann, Jason, Meinke, Jeremy, Sinclair, Adrian K., Walker, Samantha, Bai, Xiran, Beall, James, Connors, Jake, Dober, Bradley, Duff, Shannon M., Givhan, Richard C., Hilton, Gene, Hubmayr, Johannes, Karpel, Ethan D., Kuo, Chao-Lin, Mani, Hamdi, Mates, John A.B., Mathewson, Justin, Mauskopf, Philip, and Montana-Lopez, Jordi A.
- Subjects
FOCAL planes ,COSMIC background radiation ,TELESCOPES ,OPTICAL polarization ,CAMERAS - 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%. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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