7 papers · 1 filter
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).…
Atmosphere mitigation in CMB observations using multi-frequency time-domain component separation
Julien Tang, Shamik Ghosh, Jacques Delabrouille +4
CMB observations from ground-based observatories are limited in sensitivity by the fluctuating emission from the Earth's atmosphere, mostly due to water vapor inhomogeneities. Even…
Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night
Fatima Yousuf, Zack Li, Stuart D. Bale +36
The Lunar Surface Electromagnetics Experiment (LuSEE-Night) is a joint NASA-DOE-ESA low-frequency radio telescope that will reach the lunar far side in 2027. The unknown dielectric…
High efficiency superconducting filterbank with impedance-defined resolution for millimeter-wave spectroscopy
Oliver Jeong, Michel Piat, Aritoki Suzuki
We present a high efficiency, moderate resolution on-chip superconducting filterbank spectrometer designed for line intensity mapping and broadband wave-like dark matter searches.…
Fast far-sidelobe modeling for centimeter to sub-millimeter astrophysical observations
Oliver Jeong, Jacques Delabrouille, Michel Piat
Next-generation centimeter to sub-millimeter telescopes require exquisite control over instrumental far-sidelobe response to accurately measure faint signals like the Cosmic Microw…
A novel double-rim forebaffle design for centimeter to sub-millimeter astrophysical observations
Jacques Delabrouille, Oliver Jeong, Michel Piat +1
Stray radiation of various origin is a major source of degradation of centimeter to sub-millimeter astronomical observations. This is particularly problematic for the detection of…
Linear map-making with LuSEE-Night
Hugo Camacho, Kaja M. Rotermund, Anže Slosar +32
LuSEE-Night is a pathfinder radio telescope on the lunar far side employing four 3-m monopole antennas arranged as two horizontal cross pseudo-dipoles on a rotational stage and sen…