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Full-Array Noise Performance of Deployment-Grade SuperSpec mm-wave On-Chip Spectrometers

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Title: Full-Array Noise Performance of Deployment-Grade SuperSpec mm-wave On-Chip Spectrometers
Authors: Karkare, K. S., Barry, P. S., Bradford, C. M., Chapman, S., Doyle, S., Glenn, J., Gordon, S., Hailey-Dunsheath, S., Janssen, R. M. J., Kovacs, A., LeDuc, H. G., Mauskopf, P., McGeehan, R., Redford, J., Shirokoff, E., Tucker, C., Wheeler, J., Zmuidzinas, J.
Publication Year: 2020
Collection: Astrophysics
Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Astrophysics of Galaxies
More Details: SuperSpec is an on-chip filter-bank spectrometer designed for wideband moderate-resolution spectroscopy at millimeter wavelengths, employing TiN kinetic inductance detectors. SuperSpec technology will enable large-format spectroscopic integral field units suitable for high-redshift line intensity mapping and multi-object spectrographs. In previous results we have demonstrated noise performance in individual detectors suitable for photon noise limited ground-based observations at excellent mm-wave sites. In these proceedings we present the noise performance of a full $R\sim 275$ spectrometer measured using deployment-ready RF hardware and software. We report typical noise equivalent powers through the full device of $\sim 3 \times 10^{-16} \ \mathrm{W}/\sqrt{\mathrm{Hz}}$ at expected sky loadings, which are photon noise dominated. Based on these results, we plan to deploy a six-spectrometer demonstration instrument to the Large Millimeter Telescope in early 2020.
Comment: 8 pages, 5 figures. Accepted by the Journal of Low Temperature Physics (Proceedings of the 18th International Workshop on Low Temperature Detectors)
Document Type: Working Paper
DOI: 10.1007/s10909-020-02407-4
Access URL: http://arxiv.org/abs/2002.04542
Accession Number: edsarx.2002.04542
Database: arXiv
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  Data: SuperSpec is an on-chip filter-bank spectrometer designed for wideband moderate-resolution spectroscopy at millimeter wavelengths, employing TiN kinetic inductance detectors. SuperSpec technology will enable large-format spectroscopic integral field units suitable for high-redshift line intensity mapping and multi-object spectrographs. In previous results we have demonstrated noise performance in individual detectors suitable for photon noise limited ground-based observations at excellent mm-wave sites. In these proceedings we present the noise performance of a full $R\sim 275$ spectrometer measured using deployment-ready RF hardware and software. We report typical noise equivalent powers through the full device of $\sim 3 \times 10^{-16} \ \mathrm{W}/\sqrt{\mathrm{Hz}}$ at expected sky loadings, which are photon noise dominated. Based on these results, we plan to deploy a six-spectrometer demonstration instrument to the Large Millimeter Telescope in early 2020.<br />Comment: 8 pages, 5 figures. Accepted by the Journal of Low Temperature Physics (Proceedings of the 18th International Workshop on Low Temperature Detectors)
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