GroundBIRD: Observations of CMB polarization with fast scan modulation and MKIDs

Shugo Oguri, Jihoon Choi, Thushara Damayanthi, Makoto Hattori, Masashi Hazumi, Hikaru Ishitsuka, Kenji Kiuchi, Ryo Koyano, Hiroki Kutsuma, Kyungmin Lee, Satoru Mima, Makoto Minowa, Makoto Nagai, Taketo Nagasaki, Chiko Otani, Yutaro Sekimoto, Munehisa Semoto, Jun'ya Suzuki, Tohru Taino, Osamu TajimaNozomu Tomita, Eunil Won, Tomohisa Uchida, Mitsuhiro Yoshida

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

3 Citations (Scopus)


Polarized patterns in the cosmic microwave background (CMB) radiation contains rich knowledge for early stage of the universe. In particular their odd-parity patterns at large angular scale (> 1), primordial B-modes, are smoking-gun evidence for the cosmic inflation. The GroundBIRD experiment aims to detect these B-modes with a ground-based apparatus that includes several novel devices: A high-speed rotational scan system, cold optics, and microwave kinetic inductance detectors (MKIDs). We plan to start observations in the Canary Islands in 2017. In this paper, we present the status of the development of our instruments. We established an environment that allows operation of our MKIDs in an optical configuration, in which the MKIDs observe radiations from the outside of the telescope aperture. We have also constructed MKID prototypes, and we are testing them in the optical configuration.

Original languageEnglish
Title of host publicationGround-Based and Airborne Telescopes VI
EditorsHeather K. Marshall, Helen J. Hall, Roberto Gilmozzi
ISBN (Electronic)9781510601918
Publication statusPublished - 2016
EventGround-Based and Airborne Telescopes VI - Edinburgh, United Kingdom
Duration: 2016 Jun 262016 Jul 1

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherGround-Based and Airborne Telescopes VI
Country/TerritoryUnited Kingdom

Bibliographical note

Publisher Copyright:
© 2016 SPIE.


  • Cosmic microwave background
  • Microwave kinetic inductance detector
  • Polarization

ASJC Scopus subject areas

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


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