Advertisement

Journal of Low Temperature Physics

, Volume 167, Issue 5–6, pp 917–922 | Cite as

Optimizing Feedhorn-Coupled TES Polarimeters for Balloon and Space-Based CMB Observations

  • M. D. NiemackEmail author
  • J. Beall
  • D. Becker
  • H.-M. Cho
  • A. Fox
  • G. Hilton
  • J. Hubmayr
  • K. Irwin
  • D. Li
  • J. McMahon
  • J. Nibarger
  • J. Van Lanen
Article

Abstract

Maximizing the sensitivity of balloon-based and space-based observations of the cosmic microwave background (CMB) requires detectors with substantially lower saturation power and background noise than ground-based observations, because of reduced atmospheric loading and lower photon noise. We have fabricated and tested prototype transition-edge sensor (TES) bolometers that have architecture identical to that used in feedhorn-coupled TES polarimeter arrays developed for ground-based CMB observations, but have saturation power appropriate for balloon-based or space-based observations (0.5 pW–7 pW). The operating resistance of these bolometers (∼3 mΩ) is appropriate for readout with time-division or gigahertz frequency-division SQUID multiplexers. Dark bolometer measurements show that the noise levels are near the expected thermal-fluctuation-noise background (<10−17 W/Hz1/2), that the thermal response times are faster than the observation requirements, and that low-frequency 1/f noise can be strongly suppressed to <10 mHz by pair differencing. We report on the performance of the prototype devices and progress towards optimizing them for balloon-based and spaced-based observations.

Keywords

Balloon Cosmic microwave background Feedhorn Low-frequency noise Polarization Satellite Transition-Edge Sensor 

Notes

Acknowledgements

We thank NIST, NASA, and members and supporters of the TRUCE collaboration. Niemack was supported in part by a National Research Council Postdoctoral Fellowship.

References

  1. 1.
    CMBpol Mission Concept Study Group and the Primordial Polarization Program Definition Team, CMBpol Mission Concept Study Report for the Astro2010 Decadal Committee on Astrophysics (2009) Google Scholar
  2. 2.
    K. Smith et al., CMBPol mission concept study: gravitational lensing (2009). arXiv:0811.3916
  3. 3.
    J. Bock et al., EPIC-IM Overview. CMBPol Workshop Presentation (2009). http://cmbpol.uchicago.edu/workshops/path2009/abstracts.php#54
  4. 4.
    Cosmic Origins Explorer, European Space Agency White Paper (2011) Google Scholar
  5. 5.
    K.-W. Yoon et al., Feedhorn-coupled TES polarimeters for next-generation CMB instruments. Proc. LTD-13 1185, 515–518 (2009) Google Scholar
  6. 6.
    J. Hubmayr et al., An all silicon feedhorn-coupled focal plane for CMB polarimetry. J. Low Temp. Phys. (2012). doi: 10.1007/s10909-011-0420-7
  7. 7.
    T. Essinger-Hileman et al., The Atacama B-Mode search: CMB polarimetry with Transition-Edge-Sensor bolometers. Proc. LTD-13 1185, 494–497 (2009). arXiv:1008.3915 Google Scholar
  8. 8.
    J.J. McMahon et al., SPTpol: an instrument for CMB polarization. Proc. LTD-13 1185, 511–514 (2009) Google Scholar
  9. 9.
    M.D. Niemack et al., ACTPol: a polarization sensitive receiver for the Atacama Cosmology Telescope. Proc. SPIE 7741, 77411S (2010). doi: 10.1117/12.857464 CrossRefGoogle Scholar
  10. 10.
    K. Irwin, G. Hilton, Transition-Edge Sensors, in Cryogenic Particle Detection, ed. by C. Enss (Springer, Berlin, 2005) Google Scholar
  11. 11.
    J.P. Nibarger et al., An 84 pixel all-silicon corrugated feedhorn for CMB measurements. J. Low Temp. Phys. (2012). doi: 10.1007/s10909-011-0428-z
  12. 12.
    J.J. McMahon et al., Multichroic feedhorn-coupled TES polarimeters. J. Low Temp. Phys. (2012) Google Scholar
  13. 13.
    P.A. de Korte et al., Time-division superconducting quantum interference device multiplexer for transition-edge sensors. Rev. Sci. Instrum. 74, 3807–3815 (2003) ADSCrossRefGoogle Scholar
  14. 14.
    J.A. Mates, The Microwave SQUID Multiplexer. PhD thesis, University of Colorado, Boulder, USA, 2011 Google Scholar

Copyright information

© Springer Science+Business Media, LLC (outside the USA) 2012

Authors and Affiliations

  • M. D. Niemack
    • 1
    • 2
    Email author
  • J. Beall
    • 1
  • D. Becker
    • 1
    • 2
  • H.-M. Cho
    • 1
  • A. Fox
    • 1
    • 2
  • G. Hilton
    • 1
  • J. Hubmayr
    • 1
    • 2
  • K. Irwin
    • 1
  • D. Li
    • 1
    • 2
  • J. McMahon
    • 3
  • J. Nibarger
    • 1
    • 2
  • J. Van Lanen
    • 1
  1. 1.National Institute of Standards and TechnologyBoulderUSA
  2. 2.University of ColoradoBoulderUSA
  3. 3.Physics Dept.University of MichiganAnn ArborUSA

Personalised recommendations