GroundBIRD: Observing Cosmic Microwave Polarization at Large Angular Scale with Kinetic Inductance Detectors and High-Speed Rotating Telescope

S. Oguri, J. Choi, T. Damayanthi, M. Hattori, M. Hazumi, H. Ishitsuka, K. Karatsu, S. Mima, M. Minowa, T. Nagasaki, C. Otani, Y. Sekimoto, O. Tajima, N. Tomita, M. Yoshida, Eunil Won, The Groundbird Group For The Groundbird Group

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Cosmic microwave background (CMB) is an important source of information about the origin of our universe. In particular, odd-parity large angular scale patterns in the CMB polarization, the primordial B-modes, are strong evidence for an inflationary universe, related to the accelerating expansion of the metric. We are developing a unique telescope, GroundBIRD, to take CMB polarization measurements. The telescope combines novel techniques: high-speed rotation scanning, cold optics, and microwave kinetic inductance detectors (MKIDs). We evaluated the response of MKIDs on the rotation stage. Method of shielding from the geo-magnetic field is established. We have also developed a receiver cryostat. We are able to maintain a sufficient cold status for observations on the optical configuration. We plan to start commissioning the system by observing CMB in Japan in 2015–2016. We will then deploy GroundBIRD in the Canary Islands for further scientific observations.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Low Temperature Physics
DOIs
Publication statusAccepted/In press - 2015 Dec 30

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Keywords

  • Cosmic microwave background
  • Microwave kinetic inductance detector
  • Polarization

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

Oguri, S., Choi, J., Damayanthi, T., Hattori, M., Hazumi, M., Ishitsuka, H., ... For The Groundbird Group, T. G. G. (Accepted/In press). GroundBIRD: Observing Cosmic Microwave Polarization at Large Angular Scale with Kinetic Inductance Detectors and High-Speed Rotating Telescope. Journal of Low Temperature Physics, 1-7. https://doi.org/10.1007/s10909-015-1420-9