Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1

R. O'Brient; P. A. R. Ade; Z. Ahmed; R. W. Aikin; M. Amiri; S. Benton; C. Bischoff; J. J. Bock; J. A. Bonetti; J. A. Brevik; B. Burger; G. Davis; P. Day; C. D. Dowell; L. Duband; J. P. Filippini; S. Fliescher; S. R. Golwala; J. Grayson; M. Halpern; M. Hasselfield; G. Hilton; V. V. Hristov; H. Hui; K. Irwin; S. Kernasovskiy; J. M. Kovac; C. L. Kuo; E. Leitch; M. Lueker; K. Megerian; L. Moncelsi; C. B. Netterfield; H. T. Nguyen; R. W. Ogburn IV; C. L. Pryke; C. Reintsema; J. E. Ruhl; M. C. Runyan; R. Schwarz; C. D. Sheehy; Z. Staniszewski; R. Sudiwala; G. Teply; J. E. Tolan; A. D. Turner; R. S. Tucker; A. Vieregg; D. V. Wiebe; P. Wilson; C. L. Wong; W. L. K. Wu; K. W. Yoon

doi:10.1117/12.927214

27 September 2012 Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1

R. O'Brient, P. A. R. Ade, Z. Ahmed, R. W. Aikin, M. Amiri, S. Benton, C. Bischoff, J. J. Bock, J. A. Bonetti, J. A. Brevik, B. Burger, G. Davis, P. Day, C. D. Dowell, L. Duband, J. P. Filippini, S. Fliescher, S. R. Golwala, J. Grayson, M. Halpern, M. Hasselfield, G. Hilton, V. V. Hristov, H. Hui, K. Irwin, S. Kernasovskiy, J. M. Kovac, C. L. Kuo, E. Leitch, M. Lueker, K. Megerian, L. Moncelsi, C. B. Netterfield, H. T. Nguyen, R. W. Ogburn IV, C. L. Pryke, C. Reintsema, J. E. Ruhl, M. C. Runyan, R. Schwarz, C. D. Sheehy, Z. Staniszewski, R. Sudiwala, G. Teply, J. E. Tolan, A. D. Turner, R. S. Tucker, A. Vieregg, D. V. Wiebe, P. Wilson, C. L. Wong, W. L. K. Wu, K. W. Yoon

Author Affiliations +

Proceedings Volume 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI; 84521G (2012) https://doi.org/10.1117/12.927214
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

Between the BICEP2 and Keck Array experiments, we have deployed over 1500 dual polarized antenna coupled bolometers to map the Cosmic Microwave Background’s polarization. We have been able to rapidly deploy these detectors because they are completely planar with an integrated phased-array antenna. Through our experience in these experiments, we have learned of several challenges with this technology- specifically the beam synthesis in the antenna- and in this paper we report on how we have modified our designs to mitigate these challenges. In particular, we discus differential steering errors between the polarization pairs’ beam centroids due to microstrip cross talk and gradients of penetration depth in the niobium thin films of our millimeter wave circuits. We also discuss how we have suppressed side lobe response with a Gaussian taper of our antenna illumination pattern. These improvements will be used in Spider, Polar-1, and this season’s retrofit of Keck Array.

Citation Download Citation

R. O'Brient, P. A. R. Ade, Z. Ahmed, R. W. Aikin, M. Amiri, S. Benton, C. Bischoff, J. J. Bock, J. A. Bonetti, J. A. Brevik, B. Burger, G. Davis, P. Day, C. D. Dowell, L. Duband, J. P. Filippini, S. Fliescher, S. R. Golwala, J. Grayson, M. Halpern, M. Hasselfield, G. Hilton, V. V. Hristov, H. Hui, K. Irwin, S. Kernasovskiy, J. M. Kovac, C. L. Kuo, E. Leitch, M. Lueker, K. Megerian, L. Moncelsi, C. B. Netterfield, H. T. Nguyen, R. W. Ogburn IV, C. L. Pryke, C. Reintsema, J. E. Ruhl, M. C. Runyan, R. Schwarz, C. D. Sheehy, Z. Staniszewski, R. Sudiwala, G. Teply, J. E. Tolan, A. D. Turner, R. S. Tucker, A. Vieregg, D. V. Wiebe, P. Wilson, C. L. Wong, W. L. K. Wu, and K. W. Yoon "Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84521G (27 September 2012); https://doi.org/10.1117/12.927214

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