An All Silicon Feedhorn-Coupled Focal Plane for Cosmic Microwave Background Polarimetry

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• 作者：J. Hubmayr (1) hubmayr@nist.gov
  J. W. Appel (2)
  J. E. Austermann (3)
  J. A. Beall (1)
  D. Becker (1)
  B. A. Benson (4)
  L. E. Bleem (4)
  J. E. Carlstrom (45)
  C. L. Chang (45)
  H. M. Cho (1)
  A. T. Crites (4)
  T. Essinger-Hileman (2)
  A. Fox (1)
  E. M. George (6)
  N. W. Halverson (3)
  N. L. Harrington (6)
  J. W. Henning (3)
  G. C. Hilton (1)
  W. L. Holzapfel (6)
  K. D. Irwin (1)
  A. T. Lee (6)
  D. Li (1)
  J. McMahon (7)
  J. Mehl (4)
  T. Natoli (4)
  M. D. Niemack (1)
  L. B. Newburgh (2)
  J. P. Nibarger (1)
  L. P. Parker (2)
  B. L. Schmitt (8)
  S. T. Staggs (2)
  J. Van Lanen (1)
  E. J. Wollack (9)
  K. W. Yoon (10)
• 关键词：Cosmic microwave background – ; Polarimeter – ; Transition edge sensor
• 刊名：Journal of Low Temperature Physics
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：167
• 期：5-6
• 页码：904-910
• 全文大小：517.6 KB
• 参考文献：1. K.W. Yoon et al., AIP Conf. Ser. 1185, 515 (2009) <Occurrence Type="Bibcode"><Handle>2009AIPC.1185..515Y</Handle></Occurrence>
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• 作者单位：1. National Institute of Standards and Technology, Boulder, CO, USA2. Princeton University, Princeton, NJ, USA3. University of Colorado, Boulder, CO, USA4. University of Chicago, Chicago, IL, USA5. Argonne National Laboratory鈥擧EP Division, Argonne, IL, USA6. University of California, Berkeley, Berkeley, CA, USA7. University of Michigan, Ann Arbor, MI, USA8. University of Pennsylvania, Philadelphia, PA, USA9. National Aeronautics and Space Administration Goddard Space Flight Center, Goddard, MD, USA10. Stanford University, Palo Alto, CA, USA
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Characterization and Evaluation Materials
  Magnetism and Magnetic Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-7357

文摘

Upcoming experiments aim to produce high fidelity polarization maps of the cosmic microwave background. To achieve the required sensitivity, we are developing monolithic, feedhorn-coupled transition edge sensor polarimeter arrays operating at 150 GHz. We describe this focal plane architecture and the current status of this technology, focusing on single-pixel polarimeters being deployed on the Atacama B-mode Search (ABS) and an 84-pixel demonstration feedhorn array backed by four 10-pixel polarimeter arrays. The feedhorn array exhibits symmetric beams, cross-polar response <−23 dB and excellent uniformity across the array. Monolithic polarimeter arrays, including arrays of silicon feedhorns, will be used in the Atacama Cosmology Telescope Polarimeter (ACTPol) and the South Pole Telescope Polarimeter (SPTpol) and have been proposed for upcoming balloon-borne instruments.