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astro-ph.CO2026
Millimeter-Wavelength Constraints on Circular Polarization of the Cosmic Microwave Background at Arcminute Scales with the Simons Array
POLARBEAR Collaboration, Kam Arnold, Darcy R. Barron +16
We present constraints on the cosmic microwave background (CMB) circular polarization anisotropy at arcminute angular scales, using dedicated measurements from the Simons Array tak…
astro-ph.IM2026
Development and characterization of a millimeter-wave circular polarization observation method using a quarter-wave plate with Simons Array
Kana Sakaguri, Darcy R. Barron, Yuji Chinone +17
We have developed and demonstrated a method for measuring circular polarization at 90 GHz by combining a quarter-wave plate (QWP) and a continuously rotating half-wave plate (HWP).…