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15 July 2010 Initial performance of the BICEP2 antenna-coupled superconducting bolometers at the South Pole
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Abstract
We report on the preliminary detector performance of the Bicep2 mm-wave polarimeter, deployed in 2009 to the South Pole. Bicep2 is currently imaging the polarization of the cosmic microwave background at 150 GHz using an array of 512 antenna-coupled superconducting bolometers. The antennas, band-defining filters and transition edge sensor (TES) bolometers are photolithographically fabricated on 4 silicon tiles. Each tile consists of an 8×8 grid of ~7 mm spatial pixels, for a total of 256 detector pairs. A spatial pixel contains 2 sets of orthogonal antenna slots summed in-phase, with each set coupled to a TES by a filtered microstrip. The detectors are read out using time-domain multiplexed SQUIDs. The detector pair of each spatial pixel is differenced to measure polarization. We report on the performance of the Bicep2 detectors in the field, including the focal plane yield, detector and multiplexer optimization, detector noise and stability, and a preliminary estimate of the improvement in mapping speed compared to Bicep1.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. A. Brevik, R. W. Aikin, M. Amiri, S. J. Benton, J. J. Bock, J. A. Bonetti, B. Burger, C. D. Dowell, L. Duband, J. P. Filippini, S. R. Golwala, M. Halpern, M. Hasselfield, G. Hilton, V. V. Hristov, K. Irwin, J. P. Kaufman, B. G. Keating, J. M. Kovac, C. L. Kuo, A. E. Lange, E. M. Leitch, C. B. Netterfield, H. T. Nguyen, R. W. Ogburn IV, A. Orlando, C. Pryke, C. Reintsema, S. Richter, J. E. Ruhl, M. Runyan, C. Sheehy, Z. Staniszewski, R. Sudiwala, J. E. Tolan, A. D. Turner, P. Wilson, and C. L. Wong "Initial performance of the BICEP2 antenna-coupled superconducting bolometers at the South Pole", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411H (15 July 2010); https://doi.org/10.1117/12.857861
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