Optimization and sensitivity of the Keck Array

The Keck Array (SPUD) began observing the cosmic microwave background's polarization in the winter of 2011 at the South Pole. The Keck Array follows the success of the predecessor experiments Bicep and Bicep2, using five on-axis refracting telescopes. These have a combined imaging array of 2500...

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Main Authors: Kernasovskiy, S., Ade, P. A. R., Aikin, R. W., Amiri, M., Benton, S., Bischoff, C., Bock, J. J., Bonetti, J. A., Brevik, J. A., Burger, B., Davis, G., Dowell, C. D., Duband, L., Filippini, J. P., Fliescher, S., Golwala, S. R., Halpern, M., Hasselfield, M., Hiltion, G., Hristov, V. V., Irwin, K., Kovac, J. M., Kuo, C. L., Leitch, E., Lueker, M., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Pryke, C. L., Reintsema, C., Ruhl, J. E., Runyan, M. C., Schwarz, R., Sheehy, C. D., Staniszewski, Z., Sudiwala, R., Teply, G., Tolan, J. E., Turner, A. D., Vieregg, A., Wiebe, D. V., Wilson, P., Wongg, C. L.
Format: Text
Language:unknown
Published: arXiv 2012
Subjects:
Instrumentation and Methods for Astrophysics astro-ph.IM
Cosmology and Nongalactic Astrophysics astro-ph.CO
FOS Physical sciences
South Pole
South pole
Online Access:https://dx.doi.org/10.48550/arxiv.1208.0857
https://arxiv.org/abs/1208.0857
Description
Summary:The Keck Array (SPUD) began observing the cosmic microwave background's polarization in the winter of 2011 at the South Pole. The Keck Array follows the success of the predecessor experiments Bicep and Bicep2, using five on-axis refracting telescopes. These have a combined imaging array of 2500 antenna-coupled TES bolometers read with a SQUID-based time domain multiplexing system. We will discuss the detector noise and the optimization of the readout. The achieved sensitivity of the Keck Array is 11.5 μK_(CMB)*sqrt{s} in the 2012 configuration. : Presented at SPIE 2012 Astronomical Telescopes and Instrumentation Conference. Will be published in the proceedings

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