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Horn-coupled, commercially-fabricated aluminum lumped-element kinetic inductance detectors for millimeter wavelengths

McCarrick, H., Flanigan, D., Jones, G., Johnson, B. R., Ade, P. ORCID:, Araujo, D., Bradford, K., Cantor, R., Che, G., Day, P., Doyle, S. ORCID:, Leduc, H., Limon, M., Luu, V., Mauskopf, P. ORCID:, Miller, A., Mroczkowski, T., Tucker, C. ORCID: and Zmuidzinas, J. 2014. Horn-coupled, commercially-fabricated aluminum lumped-element kinetic inductance detectors for millimeter wavelengths. Review of Scientific Instruments 85 (12) , 123117. 10.1063/1.4903855

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We discuss the design, fabrication, and testing of prototype horn-coupled, lumped-element kinetic inductance detectors (LEKIDs) designed for cosmic microwave background studies. The LEKIDs are made from a thin aluminum film deposited on a silicon wafer and patterned using standard photolithographic techniques at STAR Cryoelectronics, a commercial device foundry. We fabricated 20-element arrays, optimized for a spectral band centered on 150 GHz, to test the sensitivity and yield of the devices as well as the multiplexing scheme. We characterized the detectors in two configurations. First, the detectors were tested in a dark environment with the horn apertures covered, and second, the horn apertures were pointed towards a beam-filling cryogenic blackbody load. These tests show that the multiplexing scheme is robust and scalable, the yield across multiple LEKID arrays is 91%, and the measured noise-equivalent temperatures for a 4 K optical load are in the range 26±6μKs ⎯ ⎯ √ 26±6μKs .

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: AIP Publishing
ISSN: 0034-6748
Date of First Compliant Deposit: 31 October 2018
Date of Acceptance: 1 November 2014
Last Modified: 17 Nov 2023 00:17

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