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Development of MKIDs for measurement of the cosmic microwave background with the South Pole Telescope

Dibert, K., Barry, P., Pan, Z., Anderson, A., Benson, B., Chang, C., Karkare, K., Li, J., Natoli, T., Rouble, M., Shirokoff, E. and Stark, A. 2022. Development of MKIDs for measurement of the cosmic microwave background with the South Pole Telescope. Journal of Low Temperature Physics 209 , pp. 363-371. 10.1007/s10909-022-02750-8
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We present details of the design, simulation, and initial test results of prototype detectors for the fourth-generation receiver of the South Pole Telescope (SPT). Optimized for the detection of key secondary anisotropies of the cosmic microwave background (CMB), SPT-3G+ will measure the temperature and polarization of the mm/sub-mm sky at 220, 285, and 345 GHz, beyond the peak of the CMB blackbody spectrum. The SPT-3G+ focal plane will be populated with microwave kinetic inductance detectors (MKIDs), allowing for significantly increased detector density with reduced cryogenic complexity. We present simulation-backed designs for single-color dual-polarization MKID pixels at each SPT-3G+ observation frequency. We further describe design choices made to promote resonator quality and uniformity, enabling us to maximize the available readout bandwidth. We also discuss aspects of the fabrication process that enable rapid production of these devices and present an initial dark characterization of a series of prototype devices.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Springer
ISSN: 0022-2291
Date of First Compliant Deposit: 24 June 2022
Date of Acceptance: 13 May 2022
Last Modified: 06 Dec 2022 16:33

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