Spectral characterization and performance of SPT-SLIM on-chip filterbank spectrometers

Benson, C. S., Fichman, K., Adamic, M., Anderson, A. J., Barry, P. S., Benson, B. A. and Brooks, E. 2026. Spectral characterization and performance of SPT-SLIM on-chip filterbank spectrometers. IEEE Transactions on Applied Superconductivity 10.1109/tasc.2026.3694583

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Abstract

The South Pole Telescope Shirokoff Line Intensity Mapper (SPT-SLIM) experiment is a pathfinder for demonstrating the use of on-chip spectrometers for millimeter (mm) Line Intensity Mapping (LIM). We present spectral bandpass measurements of the SPT-SLIM spectrometer channels made on site using a Fourier Transform Spectrometer during the first deployment of SPT-SLIM in the 2024-2025 Austral summer season. We note the effect of FTS systematics on measurements of on-chip filterbank spectrometer resolutions and demonstrate a technique for measuring the narrow band passes of the SPT-SLIM filterbanks that improves beyond the intrinsic resolution of a Fourier Transform Spectrometer.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Physics and Astronomy
Additional Information:	Full list of authors available at https://doi.org/10.1109/TASC.2026.3694583 License information from Publisher: LICENSE 1: URL: https://ieeexplore.ieee.org/Xplorehelp/downloads/license-information/IEEE.html, Start Date: 2026-01-01
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1051-8223
Last Modified:	01 Aug 2026 23:43
URI:	https://orca.cardiff.ac.uk/id/eprint/187421

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