GroundBIRD experiment: Detecting CMB polarization power in a large angular scale from the ground

S. Oguri, J. Choi, M. Hazumi, M. Kawai, O. Tajima, E. Won, M. Yoshida

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


GroundBIRD is a ground-based experiment designed to detect large angular scale odd-parity patterns in the cosmic microwave background (CMB) polarization (B -modes). We employ a high-speed rotation scan (20 rpm) instead of the usual left-right azimuthal scan; it allows a significant expansion of the scan range to 60° without any effect from the detector 1/f noise. We use microwave kinetic inductance detectors (MKIDs) arrays with a small telescope; our target multipole (ℓ) range is 6 ≤ ℓ ≤ 300. We plan to start the test observation in Japan in 2014; these will then be moved to the Atacama highland in Chile for scientific observations.

Original languageEnglish
Pages (from-to)691-697
Number of pages7
JournalJournal of Low Temperature Physics
Issue number5-6
Publication statusPublished - 2014 Sept

Bibliographical note

Funding Information:
Acknowledgments This work is supported by Grants-in-Aid for Scientic Research from The Ministry of Education, Culture, Sports, Science, and Technology, Japan (KAKENHI 23684017, 21111002, and 21111003), the Center for the Promotion of Integrated Sciences (CPIS) of SOKENDAI, the FY 2012 Joint Development Research on an Open Application Basis program of the NAOJ, Research Grants in the Natural Sciences from the Mitsubishi Foundation, and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2013R1A1A2004972).


  • Cosmic microwave background
  • Inflationary universe
  • Microwave kinetic inductance detector
  • Polarization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


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