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Design and characterization of the MUSCAT detectors

Gómez-Rivera, Víctor, Ade, Peter, Barry, Peter, Brien, Thomas, Castillo-Domínguez, Edgar, Ferrusca, Daniel, Hargrave, Peter, Hernández Rebollar, Jose Luis, Hornsby, Amber, Hughes, David, Murias, Dolce, Jáuregui-García, José Miguel, Mauskopf, Philip, Pérez, Abel, Papageorgiou, Andreas, Pascale, Enzo, Rowe, Samuel, Rodríguez, Ivan, Tucker, Carole, Tapia, Marcial, Miguel, Velázquez, Ventura, Salvador and Doyle, Simon 2020. Design and characterization of the MUSCAT detectors. Presented at: SPIE Astronomical Telescopes + Instrumentation 2020, Virtual, 14-18 December 2020. Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. SPIE, 114531Q. 10.1117/12.2576334

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Abstract

MUSCAT is a second-generation continuum camera for the Large Millimeter Telescope (LMT) 'Alfonso Serrano', to observe at the 1.1 mm atmospheric window. The camera has 1500 background-limited, horn-coupled lumped- element kinetic inductance detectors (LEKIDs) split across six arrays operating at 130-mK. The detector design for MUSCAT is based on a large-volume, double-meander geometry used as the inductive and two-polarization absorbing section of the LEKID resonator. In this paper we present the optical coupling of the meander to a choked waveguide output, the microwave design of the LEKID architecture, the device fabrication process and results demonstrating the detector sensitivity under a range of optical loads. Also presented are the performance of an aluminum absorbing layer used to minimize the optical cross-talk between detectors.

Item Type: Conference or Workshop Item (Paper)
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: SPIE
Funders: RCUK, CONACYT
Date of First Compliant Deposit: 15 December 2020
Date of Acceptance: 30 November 2020
Last Modified: 15 Dec 2020 16:31
URI: http://orca.cf.ac.uk/id/eprint/136983

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