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Proceedings Paper

Feedhorn-coupled TES polarimeter camera modules at 150 GHz for CMB polarization measurements with SPTpol
Author(s): J. W. Henning; P. Ade; K. A. Aird; J. E. Austermann; J. A. Beall; D. Becker; B. A. Benson; L. E. Bleem; J. Britton; J. E Carlstrom; C. L. Chang; H.-M. Cho; T. M. Crawford; A. T. Crites; A. Datesman; T. de Haan; M A. Dobbs; W. Everett; A. Ewall-Wice; E. M. George; N. W. Halverson; N. Harrington; G. C. Hilton; W. L. Holzapfel; J. Hubmayr; K. D. Irwin; M. Karfunkle; R. Keisler; J. Kennedy; A. T. Lee; E. Leitch; D. Li; M. Lueker; D. P. Marrone; J. J. McMahon; J. Mehl; S. S. Meyer; J. Montgomery; T. E. Montroy; J. Nagy; T. Natoli; J. P. Nibarger; M. D. Niemack; V. Novosad; S. Padin; C. Pryke; C. L. Reichardt; J. E. Ruhl; B. R. Saliwanchik; J. T. Sayre; K. K. Schaffer; E. Shirokoff; K. Story; C. Tucker; K. Vanderlinde; J. D. Vieira; G. Wang; R. Williamson; V. Yefremenko; K. W. Yoon; E. Young
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Paper Abstract

The SPTpol camera is a dichroic polarimetric receiver at 90 and 150 GHz. Deployed in January 2012 on the South Pole Telescope (SPT), SPTpol is looking for faint polarization signals in the Cosmic Microwave Background (CMB). The camera consists of 180 individual Transition Edge Sensor (TES) polarimeters at 90 GHz and seven 84-polarimeter camera modules (a total of 588 polarimeters) at 150 GHz. We present the design, dark characterization, and in-lab optical properties of the 150 GHz camera modules. The modules consist of photolithographed arrays of TES polarimeters coupled to silicon platelet arrays of corrugated feedhorns, both of which are fabricated at NIST-Boulder. In addition to mounting hardware and RF shielding, each module also contains a set of passive readout electronics for digital frequency-domain multiplexing. A single module, therefore, is fully functional as a miniature focal plane and can be tested independently. Across the modules tested before deployment, the detectors average a critical temperature of 478 mK, normal resistance RN of 1.2Ω , unloaded saturation power of 22.5 pW, (detector-only) optical efficiency of ~ 90%, and have electrothermal time constants < 1 ms in transition.

Paper Details

Date Published: 5 October 2012
PDF: 15 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84523A (5 October 2012); doi: 10.1117/12.927172
Show Author Affiliations
J. W. Henning, Univ. of Colorado at Boulder (United States)
P. Ade, Cardiff Univ. (United Kingdom)
K. A. Aird, The Univ. of Chicago (United States)
J. E. Austermann, Univ. of Colorado at Boulder (United States)
J. A. Beall, National Institute of Standards and Technology (United States)
D. Becker, National Institute of Standards and Technology (United States)
B. A. Benson, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
L. E. Bleem, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
J. Britton, National Institute of Standards and Technology (United States)
J. E Carlstrom, Kavli Institute for Cosmological Physics (United States)
Argonne National Lab. (United States)
The Univ. of Chicago (United States)
C. L. Chang, Kavli Institute for Cosmological Physics (United States)
Argonne National Lab. (United States)
The Univ. of Chicago (United States)
H.-M. Cho, National Institute of Standards and Technology (United States)
T. M. Crawford, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
A. T. Crites, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
A. Datesman, Argonne National Lab. (United States)
T. de Haan, McGill Univ. (Canada)
M A. Dobbs, McGill Univ. (Canada)
W. Everett, Kavli Institute for Cosmological Physics (United States)
A. Ewall-Wice, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
E. M. George, Univ. of California, Berkeley (United States)
N. W. Halverson, Univ. of Colorado at Boulder (United States)
N. Harrington, Univ. of California, Berkeley (United States)
G. C. Hilton, National Institute of Standards and Technology (United States)
W. L. Holzapfel, Univ. of California, Berkeley (United States)
J. Hubmayr, National Institute of Standards and Technology (United States)
K. D. Irwin, National Institute of Standards and Technology (United States)
M. Karfunkle, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
R. Keisler, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
J. Kennedy, McGill Univ. (Canada)
A. T. Lee, Univ. of California, Berkeley (United States)
E. Leitch, Kavli Institute for Cosmological Physics (United States)
D. Li, National Institute of Standards and Technology (United States)
M. Lueker, California Institute of Technology (United States)
D. P. Marrone, The Univ. of Arizona (United States)
J. J. McMahon, Univ. of Michigan (United States)
J. Mehl, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
S. S. Meyer, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
J. Montgomery, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
T. E. Montroy, Case Western Reserve Univ. (United States)
J. Nagy, Case Western Reserve Univ. (United States)
T. Natoli, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
J. P. Nibarger, National Institute of Standards and Technology (United States)
M. D. Niemack, National Institute of Standards and Technology (United States)
V. Novosad, Argonne National Lab. (United States)
S. Padin, Kavli Institute for Cosmological Physics (United States)
C. Pryke, Univ. of Minnesota (United States)
C. L. Reichardt, Univ. of California, Berkeley (United States)
J. E. Ruhl, Case Western Reserve Univ. (United States)
B. R. Saliwanchik, Case Western Reserve Univ. (United States)
J. T. Sayre, Case Western Reserve Univ. (United States)
K. K. Schaffer, School of the Art Institute of Chicago (United States)
E. Shirokoff, California Institute of Technology (United States)
K. Story, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
C. Tucker, Cardiff Univ. (United Kingdom)
K. Vanderlinde, McGill Univ. (Canada)
J. D. Vieira, California Institute of Technology (United States)
G. Wang, Argonne National Lab. (United States)
R. Williamson, Kavli Institute for Cosmological Physics (United States)
The Univ. of Chicago (United States)
V. Yefremenko, Argonne National Lab. (United States)
K. W. Yoon, National Institute of Standards and Technology (United States)
E. Young, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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