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Microwave Multiplexing on the Keck Array.
- Source :
-
Journal of Low Temperature Physics . May2020, Vol. 199 Issue 3/4, p858-866. 9p. - Publication Year :
- 2020
-
Abstract
- We describe an on-sky demonstration of a microwave-multiplexing readout system in one of the receivers of the Keck Array, a polarimetry experiment observing the cosmic microwave background at the South Pole. During the austral summer of 2018–2019, we replaced the time-division multiplexing readout system with microwave-multiplexing components including superconducting microwave resonators coupled to radio frequency superconducting quantum interference devices at the sub-Kelvin focal plane, coaxial-cable plumbing and amplification between room temperature and the cold stages, and a SLAC Microresonator Radio Frequency system for the warm electronics. In the range 5–6 GHz, a single coaxial cable reads out 528 channels. The readout system is coupled to transition-edge sensors, which are in turn coupled to 150-GHz slot-dipole phased-array antennas. Observations began in April 2019, and we report here on an initial characterization of the system performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222291
- Volume :
- 199
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Journal of Low Temperature Physics
- Publication Type :
- Academic Journal
- Accession number :
- 142999044
- Full Text :
- https://doi.org/10.1007/s10909-019-02296-2