Characterization of MKIDs for CMB Observation at 220 GHz With the South Pole Telescope

被引：2
作者：
Dibert, K. R. [1 ,2 ]
Barry, P. S. [3 ,4 ]
Anderson, A. J. [1 ,2 ,6 ]
Benson, B. A. [1 ,2 ,6 ]
Cecil, T. [4 ]
Chang, C. L. [1 ,2 ,4 ]
Fichman, K. N. [1 ,2 ]
Karkare, K. [1 ,2 ]
Li, J. [4 ]
Natoli, T. [1 ,2 ]
Pan, Z. [4 ]
Rouble, M. [5 ]
Shirokoff, E. [1 ,2 ]
Young, M. [2 ,6 ]
机构：
[1] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[3] Cardiff Univ, Sch Phys, Astron, Cardiff CF24 3AA, S Glam, Wales
[4] Argonne Natl Lab, Argonne, IL 60439 USA
[5] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
[6] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2023年 / 33卷 / 05期
基金：
加拿大自然科学与工程研究理事会;
关键词：
MKIDs; CMB; South Pole Telescope;
D O I：
10.1109/TASC.2023.3250386
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present an updated design of the 220 GHz microwave kinetic inductance detector (MKID) pixel for SPT-3G+, the next-generation camera for the South Pole Telescope. We show results of the dark testing of a 63-pixel array with mean inductor quality factor Q(i) = 4.8 x 10(5), aluminum inductor transition temperature T-c = 1.19 K, and kinetic inductance fraction alpha(k) = 0.32. We optically characterize both the microstrip-coupled and CPW-coupled resonators, and find both have a spectral response close to predictionwith an optical efficiency of eta similar to 70%. However, we find slightly lower optical response on the lower edge of the band than predicted, with neighboring dark detectors showing more response in this region, though at level consistent with less than 5% frequency shift relative to the optical detectors. The detectors show polarized response consistent with expectations, with a cross-polar response of similar to 10% for both detector orientations.
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页数：5
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