Design of The Kinetic Inductance Detector Based Focal Plane Assembly for The Terahertz Intensity Mapper

• Main Authors: Liu, L. -J, Janssen, R. M. J, Bradford, C. M, Hailey-Dunsheath, S, Fu, J, Filippini, J. P, Aguirre, J. E, Bracks, J. S, Corso, A. J, Groppi, C, Hoh, J, Keenan, R. P, Lowe, I. N, Marrone, D. P, Mauskopf, P, Nie, R, Redford, J, Trumper, I, Vieira, J. D
• Format: Journal Article
• Language: English
• Published: 24-07-2024
• Subjects: Physics - Applied Physics; Physics - Instrumentation and Detectors; Physics - Instrumentation and Methods for Astrophysics
• DOI: 10.48550/arxiv.2211.09351

We report on the kinetic inductance detector (KID) array focal plane assembly
design for the Terahertz Intensity Mapper (TIM). Each of the 2 arrays consists
of 4 wafer-sized dies (quadrants), and the overall assembly must satisfy
thermal and mechanical requirements, while maintaining high optical efficiency
and a suitable electromagnetic environment for the KIDs. In particular, our
design manages to strictly maintain a 50 $\mathrm{\mu m}$ air gap between the
array and the horn block. We have prototyped and are now testing a sub-scale
assembly which houses a single quadrant for characterization before integration
into the full array. The initial test result shows a $>$95% yield, indicating a
good performance of our TIM detector packaging design.