Abstract
The next generation of Cosmic Microwave Background (CMB) instruments is dedicated to the detection of CMB B-modes. Instruments like QUBIC (QU Bolometric Interferometer for Cosmology) need components with state of the art properties at high frequency (>90 GHz) to minimise instrumental systematic effects. The Orthogonal Mode Transducer (OMT) is a critical front end component as it allows the discrimination of the polarisation mode of light. Superconducting planar technology seems very promising to improve its properties and miniaturisation. We present a planar superconducting OMT operating in the W band (75–110 GHz). Design and simulations have been performed using CST Studio Suite. Laboratory characterisations were obtained with two different cryogenic setups. We will present these two cryogenic setups, the calibration procedure and preliminary results for two OMT samples.
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References
The COrE Collaboration, COrE(CosmicOriginsExplorer)AWhitePaper. Cosmol. Extragalactic Astrophys. (2011). arXiv:1102.2181v1
The QUBIC Collaboration, QUBIC: The QU Bolometric Interferometer for Cosmology. Astropart. Phys. 34 (2011)
A. Ghribi, Composants millimétriques supra-conducteurs pour la mesure de la polarisation du Fond Diffus Cosmologique et Application à l’interférométrie bolométrique. Thèse de doctorat de l’Université Paris Diderot (2009)
R.L. Kautz, Picosecond pulses on superconducting striplines. J. Appl. Phys. 49, 308–314 (1978)
M. Zannoni, A. Baù, M. Gervasi, A. Passerini, S. Spinelli, A. Tartari, G. Sironi, Measurement accuracy of S-parameters in W band at cryogenic temperature, in 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), Sept. 5–10, 2010, pp. 1–2. doi:10.1109/ICIMW.2010.5612595
Acknowledgements
This work is supported by CNES, CNRS, Paris Diderot and Paris-Sud universities under the BSD French R&D project (B-mode Superconducting Detectors), and also by Agence Nationale de la Recherche (ANR) under the COS2 contract (Superconducting COmponents for Cosmic microwave background ObservationS).
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Bordier, G., Ghribi, A., Zannoni, M. et al. W-Band Superconducting Planar Orthogonal Mode Transducer Characterisation. J Low Temp Phys 167, 491–496 (2012). https://doi.org/10.1007/s10909-012-0513-y
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DOI: https://doi.org/10.1007/s10909-012-0513-y