V. Gómez-Rivera, P. Ade, P. Barry, T. Brien, E. Castillo-Domínguez, D. Ferrusca, P. Hargrave, J. L. Hernández-Rebollar, A. Hornsby, D. Hughes, J. M. Jáuregui-García, P. Mauskopf, D. Murias, A. Papageorgiou, E. Pascale, A. Pérez, I. Rodríguez, S. Rowe, M. Tapia, C. Tucker, M. Velázquez, S. Ventura, S. Doyle
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Design and characterization of the MUSCAT detectors
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.
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