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High-Q LC Filters for FDM Read out of Cryogenic Sensor Arrays

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Abstract

We present new results on the development of larger arrays (presently 72 channels, goal of multiple units of 160 channels) of superconducting LC filters. The a-Si:H based resonators show a quality factor above 10.000. The latest design utilizes oppositely wound planar coil pairs which enable close packing with low magnetic cross talk. We present results on the obtained center frequency distribution within the range of 1 to 3 MHz.

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Acknowledgements

The authors thank Dr. J.K. Rath (Nanophotonics Physics of Devices, Utrecht University) for deposition of a-Si:H layers, A.J. van der Linden for fabrication assistance, and M. Schoemans and M.A. Lindeman for measurement assistance. This work was financially supported by the Netherlands organization for Scientific Research (NWO).

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Correspondence to M. P. Bruijn.

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Bruijn, M.P., Gottardi, L., den Hartog, R.H. et al. High-Q LC Filters for FDM Read out of Cryogenic Sensor Arrays. J Low Temp Phys 167, 695–700 (2012). https://doi.org/10.1007/s10909-011-0422-5

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  • DOI: https://doi.org/10.1007/s10909-011-0422-5

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