Development of multi-chroic MKIDs for next-generation CMB polarization studies

Johnson, B. R., Flanigan, D., Abitbol, M. H., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Bryan, S., Cho, H.-M., Datta, R., Day, P., Doyle, Simon ORCID: https://orcid.org/0000-0002-9054-986X, Irwin, K., Jones, G., Li, D., Mauskopf, P., McCarrick, H., McMahon, J., Miller, A., Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681, Song, Y., Surdi, H. and Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918 2018. Development of multi-chroic MKIDs for next-generation CMB polarization studies. Journal of Low Temperature Physics 193 (3-4) , pp. 103-112. 10.1007/s10909-018-2032-y

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Abstract

We report on the status of an ongoing effort to develop arrays of horn-coupled, polarization-sensitive microwave kinetic inductance detectors (MKIDs) that are each sensitive to two spectral bands between 125 and 280 GHz. These multi-chroic MKID arrays are tailored for next-generation, large-detector-count experiments that are being designed to simultaneously characterize the polarization properties of both the cosmic microwave background and Galactic dust emission. We present our device design and describe laboratory-based measurement results from two 23-element prototype arrays. From dark measurements of our first engineering array, we demonstrated a multiplexing factor of 92, showed the resonators respond to bath temperature changes as expected, and found that the fabrication yield was 100%. From our first optically loaded array, we found the MKIDs respond to millimeter-wave pulses; additional optical characterization measurements are ongoing. We end by discussing our plans for scaling up this technology to kilo-pixel arrays over the next 2 years.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Springer
ISSN:	0022-2291
Date of First Compliant Deposit:	2 August 2018
Date of Acceptance:	18 July 2018
Last Modified:	04 May 2023 23:53
URI:	https://orca.cardiff.ac.uk/id/eprint/113853

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