Cover Image

Saved in:
Bibliographic Details
Main Authors: Sugiyama, Junna, Terasaki, Tomoki, Sakaguri, Kana, Bixler, Bryce, Sakurai, Yuki, Arnold, Kam, Crowley, Kevin T., Datta, Rahul, Galitzki, Nicholas, Hasegawa, Masaya, Johnson, Bradley R., Keating, Brian, Kusaka, Akito, Lee, Adrian, Matsumura, Tomotake, Mcmahon, Jeffrey, Silva-Feaver, Maximiliano, Wang, Yuhan, Yamada, Kyohei
Format: Preprint
Published: 2024
Subjects:
Instrumentation and Methods for Astrophysics
Online Access:https://arxiv.org/abs/2402.09620
Tags: Add Tag
No Tags, Be the first to tag this record!
Table of Contents:
  • The Simons Observatory (SO) experiment is a cosmic microwave background (CMB) experiment located in the Atacama Desert, Chile. The SO' s small aperture telescopes (SATs) consist of three telescopes designed for precise CMB polarimetry at large angular scales. Each SAT uses a cryogenic rotating half-wave plate (HWP) as a polarization modulator to mitigate atmospheric 1/f noise and other systematics. To realize efficient polarization modulation over the observation bands, we fabricated an achromatic HWP (AHWP) consisting of three sapphire plates with anti-reflection coatings. The AHWP is designed to have broadband modulation efficiency and transmittance. This paper reports on the design and the preliminary characterization of the AHWPs for SATs.

Similar Items