Performance and on-sky optical characterization of the SPTpol instrument

George, E. M., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Aird, K. A., Austermann, J. E., Beall, J. A., Becker, D., Bender, A., Benson, B. A., Bleem, L. E., Britton, J., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Cho, H.-M., Crawford, T. M., Crites, A. T., Datesman, A., de Haan, T., Dobbs, M. A., Everett, W., Ewall-Wice, A., Halverson, N. W., Harrington, N., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Hoover, S., Huang, N., Hubmayr, J., Irwin, K. D., Karfunkle, M., Keisler, R., Kennedy, J., Lee, A. T., Leitch, E., Li, D., Lueker, M., Marrone, D. P., McMahon, J. J., Mehl, J., Meyer, S. S., Montgomery, J., Montroy, T. E., Nagy, J., Natoli, T., Nibarger, J. P., Niemack, M. D., Novosad, V., Padin, S., Pryke, C., Reichardt, C. L., Ruhl, J. E., Saliwanchik, B. R., Sayre, J. T., Schaffer, K. K., Shirokoff, E., Story, K., Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918, Vanderlinde, K., Vieira, J. D., Wang, G., Williamson, R., Yefremenko, V., Yoon, K. W. and Young, E. 2012. Performance and on-sky optical characterization of the SPTpol instrument. Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, Amsterdam, The Netherlands, 1 July 2012. Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI. , vol.8452 The International Society for Optical Engineering, 84521F. 10.1117/12.925586

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Abstract

In January 2012, the 10m South Pole Telescope (SPT) was equipped with a polarization-sensitive camera, SPTpol, in order to measure the polarization anisotropy of the cosmic microwave background (CMB). Measurements of the polarization of the CMB at small angular scales (~several arcminutes) can detect the gravitational lensing of the CMB by large scale structure and constrain the sum of the neutrino masses. At large angular scales (~few degrees) CMB measurements can constrain the energy scale of Inflation. SPTpol is a two-color mm-wave camera that consists of 180 polarimeters at 90 GHz and 588 polarimeters at 150 GHz, with each polarimeter consisting of a dual transition edge sensor (TES) bolometers. The full complement of 150 GHz detectors consists of 7 arrays of 84 ortho-mode transducers (OMTs) that are stripline coupled to two TES detectors per OMT, developed by the TRUCE collaboration and fabricated at NIST. Each 90 GHz pixel consists of two antenna-coupled absorbers coupled to two TES detectors, developed with Argonne National Labs. The 1536 total detectors are read out with digital frequency-domain multiplexing (DfMUX). The SPTpol deployment represents the first on-sky tests of both of these detector technologies, and is one of the first deployed instruments using DfMUX readout technology. We present the details of the design, commissioning, deployment, on-sky optical characterization and detector performance of the complete SPTpol focal plane.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	Anisotropy; Antennas; Bolometers; Cameras; Equipment and services; Multiplexing; Polarimetry; Polarization; Sensors; Telescopes
Publisher:	The International Society for Optical Engineering
ISSN:	0277-786X
Last Modified:	24 Oct 2022 11:03
URI:	https://orca.cardiff.ac.uk/id/eprint/46761

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