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astro-ph.IM2023★ 3 cited
Anti-reflection coating with mullite and Duroid for large-diameter cryogenic sapphire and alumina optics
Kana Sakaguri, Masaya Hasegawa, Yuki Sakurai +10
We developed a broadband two-layer anti-reflection (AR) coating for use on a sapphire half-wave plate (HWP) and an alumina infrared (IR) filter for the cosmic microwave background…
astro-ph.IM2023★ 5 cited
Photon noise correlations in millimeter-wave telescopes
Charles A. Hill, Akito Kusaka
Many modern millimeter and submillimeter (``mm-wave'') telescopes for astronomy are deploying more detectors by increasing detector pixel density, and with the rise of lithographed…
astro-ph.IM2023
The Simons Observatory: Cryogenic Half Wave Plate Rotation Mechanism for the Small Aperture Telescopes
K. Yamada, B. Bixler, Y. Sakurai +24
We present the requirements, design and evaluation of the cryogenic continuously rotating half-wave plate (CHWP) for the Simons Observatory (SO). SO is a cosmic microwave backgroun…