CCAT: nonlinear effects in 280 GHz aluminum kinetic inductance detectors

Cody J. Duell; Jason Austermann; James R. Burgoyne; Scott C. Chapman; Steve K. Choi; Abigail T. Crites; Rodrigo G. Freundt; Anthony I. Huber; Zachary B. Huber; Johannes Hubmayr; Ben Keller; Lawrence T. Lin; Alicia M. Middleton; Colin C. Murphy; Michael D. Niemack; Thomas Nikola; Darshan Patel; Adrian K. Sinclair; Ema Smith; Gordon J. Stacey; Anna Vaskuri; Eve M. Vavagiakis; Michael Vissers; Samantha Walker; Jordan Wheeler

doi:10.1117/12.3020507

16 August 2024 CCAT: nonlinear effects in 280 GHz aluminum kinetic inductance detectors

Cody J. Duell, Jason Austermann, James R. Burgoyne, Scott C. Chapman, Steve K. Choi, Abigail T. Crites, Rodrigo G. Freundt, Anthony I. Huber, Zachary B. Huber, Johannes Hubmayr, Ben Keller, Lawrence T. Lin, Alicia M. Middleton, Colin C. Murphy, Michael D. Niemack, Thomas Nikola, Darshan Patel, Adrian K. Sinclair, Ema Smith, Gordon J. Stacey, Anna Vaskuri, Eve M. Vavagiakis, Michael Vissers, Samantha Walker, Jordan Wheeler

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131021O (2024) https://doi.org/10.1117/12.3020507
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Prime-Cam, a first-generation science instrument for the Atacama-based Fred Young Submillimeter Telescope, is being built by the CCAT Collaboration to observe at millimeter and submillimeter wavelengths using kinetic inductance detectors (KIDs). Prime-Cam’s 280 GHz instrument module will deploy with two aluminum-based KID arrays and one titanium nitride-based KID array, totaling ∼10,000 detectors at the focal plane, all of which have been fabricated and are currently undergoing testing. One complication of fielding large arrays of KIDs under dynamic loading conditions is tuning the detector tone powers to maximize signal-to-noise while avoiding bifurcation due to the nonlinear kinetic inductance. For aluminum-based KIDs, this is further complicated by additional nonlinear effects which couple tone power to resonator quality factors and resonant frequencies. While both nonequilibrium quasiparticle dynamics and two-level system fluctuations have been shown to give rise to qualitatively similar distortions, modeling these effects alongside nonlinear kinetic inductance is inefficient when fitting thousands of resonators on-sky with existing models. For this reason, it is necessary to have a detailed understanding of the nonlinear effects across relevant detector loading conditions, including how they impact on on-sky noise and how to diagnose the detector’s relative performance. We present a study of the competing nonlinearities seen in Prime-Cam’s 280 GHz aluminum KIDs, with a particular emphasis on the resulting distortions to the resonator line shape and how these impact detector parameter estimation.

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

Citation Download Citation

Cody J. Duell, Jason Austermann, James R. Burgoyne, Scott C. Chapman, Steve K. Choi, Abigail T. Crites, Rodrigo G. Freundt, Anthony I. Huber, Zachary B. Huber, Johannes Hubmayr, Ben Keller, Lawrence T. Lin, Alicia M. Middleton, Colin C. Murphy, Michael D. Niemack, Thomas Nikola, Darshan Patel, Adrian K. Sinclair, Ema Smith, Gordon J. Stacey, Anna Vaskuri, Eve M. Vavagiakis, Michael Vissers, Samantha Walker, and Jordan Wheeler "CCAT: nonlinear effects in 280 GHz aluminum kinetic inductance detectors", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131021O (16 August 2024); https://doi.org/10.1117/12.3020507

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available