CCAT: design and performance of densely packed, high-frequency, dual-polarization kinetic inductance detectors for the Prime-Cam 850 GHz module

Anthony I. Huber; Jason Austermann; James Beall; James Burgoyne; Scott Chapman; Steve K. Choi; Doug Henke; Zachary B. Huber; Johannes Hubmayr; Jeff van Lanen; Adrian Sinclair; Anna Vaskuri; Eve M. Vavagiakis; Michael Vissers; Jordan Wheeler

doi:10.1117/12.3020419

16 August 2024 CCAT: design and performance of densely packed, high-frequency, dual-polarization kinetic inductance detectors for the Prime-Cam 850 GHz module

Anthony I. Huber, Jason Austermann, James Beall, James Burgoyne, Scott Chapman, Steve K. Choi, Doug Henke, Zachary B. Huber, Johannes Hubmayr, Jeff van Lanen, Adrian Sinclair, Anna Vaskuri, Eve M. Vavagiakis, Michael Vissers, Jordan Wheeler

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 1310203 (2024) https://doi.org/10.1117/12.3020419
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

Prime-Cam is a first-generation instrument designed for the Fred Young Submillimeter Telescope (FYST) in the Cerro Chajnantor Atacama Telescope (CCAT) Facility. Among the instrument modules being developed for the Prime-Cam receiver, the highest frequency 850 GHz module presents unique challenges in optical design, coupling, detection, and readout. The 850 GHz module will incorporate approximately 45,000 polarization-sensitive, lumped-element microwave kinetic inductance detectors (KIDs), which will represent the most KIDs on sky in a single instrument to date. We present the critical aspects of the detector design and discuss solutions to the challenges of efficient optical coupling and a multioctave readout band. Specifically, the designs will include a feature which reduces the inductance across a portion of the detectors by shorting pairs of inductor lines to allow the KIDs to be tuned across four distinct bands across the readout range, all with minimal impact to the responsivity of the detector. Thus, the resonators will be coarsely tuned via the inductance shorts, and finely tuned by etching away small portions of the interdigital capacitors. We further present a comparison between simulations and preliminary results of thermal responsivity. The results of this work will directly inform the design of microwave KIDs for the multi-octave readout architecture as part of the development of densely packed arrays for the Prime-Cam instrument.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Anthony I. Huber, Jason Austermann, James Beall, James Burgoyne, Scott Chapman, Steve K. Choi, Doug Henke, Zachary B. Huber, Johannes Hubmayr, Jeff van Lanen, Adrian Sinclair, Anna Vaskuri, Eve M. Vavagiakis, Michael Vissers, and Jordan Wheeler "CCAT: design and performance of densely packed, high-frequency, dual-polarization kinetic inductance detectors for the Prime-Cam 850 GHz module", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 1310203 (16 August 2024); https://doi.org/10.1117/12.3020419

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