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Recent Developments of Commercially Fabricated Horn Antenna-Coupled Transition-Edge Sensor Bolometer Detectors for Next-Generation Cosmic Microwave Background Polarimetry Experiments

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Abstract

We report on the successful fabrication of orthomode transducer-coupled transition-edge sensor (TES) bolometer arrays for cosmic microwave background (CMB) polarimetry experiments with the superconductor electronics fabrication facility at SEEQC Inc. Commercial microfabrication foundry could provide increase in detector fabrication throughput for a next-generation CMB experiment, CMB-S4, that would deploy approximately one order of magnitude more detectors than current CMB experiments. We also developed TES bolometers with two TESs in series that have two different superconducting temperatures (\(T_c\)) using a superconducting proximity effect between niobium (Nb) and aluminum-manganese (AlMn) alloy. We will discuss the motivation, design considerations, fabrication processes, test results, and how industrial detector fabrication could be a path to fabricate hundreds of detector wafers for future CMB polarimetry experiments and other experiments that require TESs and superconducting RF circuits.

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Acknowledgements

This work was supported by: Early Career Research Program, Office of Science, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. CMB-S4 project, Office of Science, of the U.S. Department of Energy. Small Business Innovation Research (SBIR), Office of Science, of the U.S. Department of Energy under Award Nos. DE-SC0019820 and DE-SC0018711.

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Correspondence to Aritoki Suzuki.

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Suzuki, A., Kane, E., Lee, A.T. et al. Recent Developments of Commercially Fabricated Horn Antenna-Coupled Transition-Edge Sensor Bolometer Detectors for Next-Generation Cosmic Microwave Background Polarimetry Experiments. J Low Temp Phys 209, 1111–1118 (2022). https://doi.org/10.1007/s10909-022-02731-x

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  • DOI: https://doi.org/10.1007/s10909-022-02731-x

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