K Yamada, B Bixler, Y Sakurai, P C Ashton, J Sugiyama, K Arnold, J Begin, L Corbett, S Day-Weiss, N Galitzki, C A Hill, B R Johnson, B Jost, A Kusaka, B J Koopman, J Lashner, A T Lee, A Mangu, H Nishino, L A Page, M J Randall, D Sasaki, X Song, J Spisak, T Tsan, Y Wang, P A Williams
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 background polarization experiment at Parque Astronómico de Atacama in northern Chile that covers a wide range of angular scales using both small (⌀0.42 m) and large (⌀6 m) aperture telescopes. In particular, the small aperture telescopes (SATs) focus on large angular scales for primordial B-mode polarization...
February 1, 2024: Review of Scientific Instruments