The Simons Observatory: A fully remote controlled calibration system with a sparse wire grid for cosmic microwave background telescopes-Reference-Cited by-同舟云学术

The Simons Observatory: A fully remote controlled calibration system with a sparse wire grid for cosmic microwave background telescopes

Published:2023-12-01 Issue:12 Volume:94 Page:
ISSN:0034-6748
Container-title:Review of Scientific Instruments
language:en
Short-container-title:

Author:

Murata Masaaki¹^ORCID,Nakata Hironobu²^ORCID,Iijima Kengo¹^ORCID,Adachi Shunsuke²³^ORCID,Seino Yudai²⁴^ORCID,Kiuchi Kenji¹^ORCID,Matsuda Frederick⁵^ORCID,Randall Michael J.⁶⁷^ORCID,Arnold Kam⁶⁷^ORCID,Galitzki Nicholas⁸⁹^ORCID,Johnson Bradley R.¹⁰^ORCID,Keating Brian⁶⁷^ORCID,Kusaka Akito¹^ORCID,Lloyd John B.⁶⁷^ORCID,Seibert Joseph⁶⁷^ORCID,Silva-Feaver Maximiliano⁶⁷^ORCID,Tajima Osamu²^ORCID,Terasaki Tomoki¹^ORCID,Yamada Kyohei¹^ORCID

Affiliation:

1. Department of Physics, The University of Tokyo 1 , Tokyo 113-0033, Japan

2. Department of Physics, Kyoto University 2 , Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan

3. Hakubi Center for Advanced Research, Kyoto University 3 , Yoshida-honmachi, Sakyo-ku, Kyoto 606-850, Japan

4. Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University 4 , Princeton, New Jersey 08544, USA

5. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) 5 , Sagamihara, Kanagawa 252-5210, Japan

6. Department of Physics, University of California, San Diego 6 , La Jolla, California 92093, USA

7. Center for Astrophysics and Space Sciences 7 , 9500 Gilman Dr., La Jolla, California 92093, USA

8. Department of Physics, University of Texas at Austin 8 , Austin, Texas 78712, USA

9. Weinberg Institute for Theoretical Physics, Texas Center for Cosmology and Astroparticle Physics 9 , Austin, Texas 78712, USA

10. Department of Astronomy, University of Virginia 10 , Charlottesville, Virginia 22904, USA

Abstract

For cosmic microwave background (CMB) polarization observations, calibration of detector polarization angles is essential. We have developed a fully remote controlled calibration system with a sparse wire grid that reflects linearly polarized light along the wire direction. The new feature is a remote-controlled system for regular calibration, which has not been possible in sparse wire grid calibrators in past experiments. The remote control can be achieved by two electric linear actuators that load or unload the sparse wire grid into a position centered on the optical axis of a telescope between the calibration time and CMB observation. Furthermore, the sparse wire grid can be rotated by using a motor. A rotary encoder and a gravity sensor are installed on the sparse wire grid to monitor the wire direction. They allow us to achieve detector polarization angle calibration with an expected systematic error of 0.08°. The calibration system will be installed in small-aperture telescopes at Simons Observatory.

Funder

Simons Foundation

Japan Society for the Promotion of Science

JSPS Core-to-Core Program

JST, The Establishment of University Fellowships Toward the Creation of Science Technology Innovation

U.S. Department of Energy, Office of Science, Office of High Energy Physics

Publisher

AIP Publishing

Subject

Instrumentation

Link

https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/5.0175099/18266628/124502_1_5.0175099.pdf

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