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

Johnson, B. R., Flanigan, D., Abitbol, M. H., Ade, Peter A. R., Bryan, S., Cho, H.-M., Datta, R., Day, P., Doyle, Simon, Irwin, K., Jones, G., Li, D., Mauskopf, P., McCarrick, H., McMahon, J., Miller, A., Pisano, Giampaolo, Song, Y., Surdi, H. and Tucker, Carole 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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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: 30 May 2019 20:50

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