Optical efficiency of feedhorn-coupled TES polarimeters for next-generation CMB instruments

J. W. Henning, J. W. Appel, J. E. Austermann, J. A. Beall, D. Becker, D. A. Bennett, L. E. Bleem, B. A. Benson, J. Britton, J. E. Carlstrom, C. L. Chang, H. M. Cho, A. T. Crites, T. Essinger-Hileman, W. Everett, E. M. George, N. W. Halverson, G. C. Hilton, W. L. Holzapfel, J. HubmayrK. D. Irwin, D. Li, J. Mcmahon, J. Mehl, S. S. Meyer, S. Moseley, J. P. Nibarger, M. D. Niemack, L. P. Parker, E. Shirokoff, S. M. Simon, Suzanne Therese Staggs, J. N. Ullom, K. U-Yen, Catherine Katerina Visnjic, E. Wollack, K. W. Yoon, E. Y. Young, Y. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The next generation of Cosmic Microwave Background (CMB) experiments probing for signals of inflation and small angular scale polarization anisotropies require higher sensitivity and better control of systematics. We are developing monolithic arrays of orthomode transducer (OMT) coupled transition edge sensor (TES) polarimeters designed for operation at 150 GHz to address these requirements. OMT coupling allows for simultaneous and independent detection of two orthogonal linear polarization states incident on a single pixel. We present measurements of optical efficiencies ηop of single pixels with on-chip band-defining filters, with ηop = 57±4 stat±9 sys %. We also provide evidence for an out-of-band blue leak and address possible sources as well as mitigation techniques. Additionally, we discuss methods for increasing efficiency being implemented in the next generation of pixels, currently in fabrication. Still under development, these pixels are produced as monolithic polarimeter arrays and are slated for use in the Atacama Cosmology Telescope Polarization (ACTpol) and South Pole Telescope Polarization (SPTpol) experiments, while single-pixel polarimeters are to be deployed in the Atacama B-mode Search (ABS) experiment.

Original languageEnglish (US)
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
DOIs
StatePublished - Sep 7 2010
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V - San Diego, CA, United States
Duration: Jun 29 2010Jul 2 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7741
ISSN (Print)0277-786X

Other

OtherMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
CountryUnited States
CitySan Diego, CA
Period6/29/107/2/10

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • TES
  • bolometer
  • cosmology
  • detector array
  • optical properties
  • polarimeter

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  • Cite this

    Henning, J. W., Appel, J. W., Austermann, J. E., Beall, J. A., Becker, D., Bennett, D. A., Bleem, L. E., Benson, B. A., Britton, J., Carlstrom, J. E., Chang, C. L., Cho, H. M., Crites, A. T., Essinger-Hileman, T., Everett, W., George, E. M., Halverson, N. W., Hilton, G. C., Holzapfel, W. L., ... Zhao, Y. (2010). Optical efficiency of feedhorn-coupled TES polarimeters for next-generation CMB instruments. In Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V [774122] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7741). https://doi.org/10.1117/12.859478