Prime-Cam, one of the primary instruments for the Fred Young Submillimeter Telescope (FYST) developed by the CCAT Collaboration, will house up to seven instrument modules, with the first operating at 280 GHz. Each module will include three arrays of superconducting microwave kinetic inductance detectors (KIDs). The first KID array fabricated for the 280 GHz module uses titanium-nitride (TiN) as the superconducting material and has 3,456 individual detectors, while the other two arrays use aluminum. This paper presents the design and laboratory characterization of the 280 GHz TiN array, which is cooled below its critical temperature to ~0.1 K and read out over six RF feedlines. LED mapping, a technique for matching the measured resonant frequency of a detector to its physical position, was performed on the array so that the results can be used to lithographically trim the KID capacitors and increase the yield of the array by reducing frequency collisions. We present the methods and results of LED mapping the 280 GHz TiN KID array before deployment on FYST.
@article{arxiv.2410.21396,
title = {CCAT: LED Mapping and Characterization of the 280 GHz TiN KID Array},
author = {Alicia Middleton and Steve K. Choi and Samantha Walker and Jason Austermann and James R. Burgoyne and Victoria Butler and Scott C. Chapman and Abigail T. Crites and Cody J. Duell and Rodrigo G. Freundt and Anthony I. Huber and Zachary B. Huber and Johannes Hubmayr and Ben Keller and Lawrence T. Lin and Michael D. Niemack and Darshan Patel and Adrian K. Sinclair and Ema Smith and Anna Vaskuri and Eve M. Vavagiakis and Michael Vissers and Yuhan Wang and Jordan Wheeler},
journal= {arXiv preprint arXiv:2410.21396},
year = {2024}
}
Comments
4 pages, 4 figures, submitted to IEEE Transactions on Applied Superconductivity (IEEE TAS)