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Proceedings Paper

Keck array and BICEP3: spectral characterization of 5000+ detectors
Author(s): K. S. Karkare; P. A. R. Ade; Z. Ahmed; R. W. Aikin; K. D. Alexander; M. Amiri; D. Barkats; S. J. Benton; C. A. Bischoff; J. J. Bock; J. A. Bonetti; J. A. Brevik; I. Buder; E. W. Bullock; B. Burger; J. Connors; B. P. Crill; G. Davis; C. D. Dowell; L. Duband; J. P. Filippini; S. T. Fliescher; S. R. Golwala; M. S. Gordon; J. A. Grayson; M. Halpern; M. Hasselfield; S. R. Hildebrandt; G. C. Hilton; V. V. Hristov; H. Hui; K. D. Irwin; J. H. Kang; E. Karpel; S. Kefeli; S. A. Kernasovskiy; J. M. Kovac; C. L. Kuo; E. M. Leitch; M. Lueker; P. Mason; K. G. Megerian; C. B. Netterfield; H. T. Nguyen; R. O'Brient; R. W. Ogburn; C. L. Pryke; C. D. Reintsema; S. Richter; R. Schwarz; C. D. Sheehy; Z. K. Staniszewski; R. V. Sudiwala; G. P. Teply; K. L. Thompson; J. E. Tolan; A. D. Turner; A. Vieregg; A. Weber; C. L. Wong; W. L. K. Wu; K. W. Yoon
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Paper Abstract

The inflationary paradigm of the early universe predicts a stochastic background of gravitational waves which would generate a B-mode polarization pattern in the cosmic microwave background (CMB) at degree angular scales. Precise measurement of B-modes is one of the most compelling observational goals in modern cosmology. Since 2011, the Keck Array has deployed over 2500 transition edge sensor (TES) bolometer detectors at 100 and 150 GHz to the South Pole in pursuit of degree-scale B-modes, and Bicep3 will follow in 2015 with 2500 more at 100 GHz. Characterizing the spectral response of these detectors is important for controlling systematic effects that could lead to leakage from the temperature to polarization signal, and for understanding potential coupling to atmospheric and astrophysical emission lines. We present complete spectral characterization of the Keck Array detectors, made with a Martin-Puplett Fourier Transform Spectrometer at the South Pole, and preliminary spectra of Bicep3 detectors taken in lab. We show band centers and effective bandwidths for both Keck Array bands, and use models of the atmosphere at the South Pole to cross check our absolute calibration. Our procedure for obtaining interferograms in the field with automated 4-axis coupling to the focal plane represents an important step towards efficient and complete spectral characterization of next-generation instruments more than 10000 detectors.

Paper Details

Date Published: 19 August 2014
PDF: 11 pages
Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91533B (19 August 2014); doi: 10.1117/12.2056779
Show Author Affiliations
K. S. Karkare, Harvard-Smithsonian Ctr. for Astrophysics (United States)
P. A. R. Ade, Cardiff Univ. (United Kingdom)
Z. Ahmed, Stanford Univ. (United Kingdom)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)
R. W. Aikin, California Institute of Technology (United States)
K. D. Alexander, Harvard-Smithsonian Ctr. for Astrophysics (United States)
M. Amiri, The Univ. of British Columbia (Canada)
D. Barkats, Joint ALMA Observatory (Chile)
S. J. Benton, Univ. of Toronto (Canada)
C. A. Bischoff, Harvard-Smithsonian Ctr. for Astrophysic (United States)
J. J. Bock, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
J. A. Bonetti, Jet Propulsion Lab. (United States)
J. A. Brevik, California Institute of Technology (United States)
I. Buder, Harvard-Smithsonian Ctr. for Astrophysics (United States)
E. W. Bullock, Univ. of Minnesota (United States)
B. Burger, The Univ. of British Columbia (Canada)
J. Connors, Harvard-Smithsonian Ctr. for Astrophysics (United States)
B. P. Crill, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
G. Davis, The Univ. of British Columbia (Canada)
C. D. Dowell, Jet Propulsion Lab. (United States)
L. Duband, Commissariat à l'Énergie Atomique (France)
J. P. Filippini, California Institute of Technology (United States)
S. T. Fliescher, Univ. of Minnesota (United States)
S. R. Golwala, California Institute of Technology (United States)
M. S. Gordon, Harvard-Smithsonian Ctr. for Astrophysics (United States)
J. A. Grayson, Stanford Univ. (United States)
M. Halpern, The Univ. of British Columbia (Canada)
M. Hasselfield, The Univ. of British Columbia (Canada)
S. R. Hildebrandt, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
G. C. Hilton, National Institute of Standards and Technology (United States)
V. V. Hristov, California Institute of Technology (United States)
H. Hui, California Institute of Technology (United States)
K. D. Irwin, Stanford Univ. (United States)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)
National Institute of Standards and Technology (United States)
J. H. Kang, Stanford Univ. (United States)
E. Karpel, Stanford Univ. (United States)
S. Kefeli, California Institute of Technology (United States)
S. A. Kernasovskiy, Stanford Univ. (United States)
J. M. Kovac, Harvard-Smithsonian Ctr. for Astrophysics (United States)
C. L. Kuo, Stanford Univ. (United States)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)
E. M. Leitch, Univ. of Chicago (United States)
M. Lueker, California Institute of Technology (United States)
P. Mason, California Institute of Technology (United States)
K. G. Megerian, Jet Propulsion Lab. (United States)
C. B. Netterfield, Univ. of Toronto (Canada)
Canadian Institute for Advanced Research (Canada)
H. T. Nguyen, Jet Propulsion Lab. (United States)
R. O'Brient, Jet Propulsion Lab. (United States)
R. W. Ogburn, Stanford Univ. (United States)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)
C. L. Pryke, Univ. of Minnesota (United States)
C. D. Reintsema, National Institute of Standards and Technology (United States)
S. Richter, Harvard-Smithsonian Ctr. for Astrophysics (United States)
R. Schwarz, Univ. of Minnesota (United States)
C. D. Sheehy, Univ. of Minnesota (United States)
Univ. of Chicago (United States)
Z. K. Staniszewski, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
R. V. Sudiwala, Cardiff Univ. (United Kingdom)
G. P. Teply, California Institute of Technology (United States)
K. L. Thompson, Stanford Univ. (United States)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)
J. E. Tolan, Stanford Univ. (United States)
A. D. Turner, Jet Propulsion Lab. (United States)
A. Vieregg, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Univ. of Chicago (United States)
A. Weber, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)
C. L. Wong, Harvard-Smithsonian Ctr. for Astrophysics (United States)
W. L. K. Wu, Stanford Univ. (United States)
K. W. Yoon, Stanford Univ. (United States)
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Lab. (United States)


Published in SPIE Proceedings Vol. 9153:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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