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The Simons Observatory: Design, Integration, and Current Status of Small Aperture Telescopes
Aashrita Mangu, Lance Corbett, Sanah Bhimani +14
The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment located in the Atacama Desert in Chile at an elevation of 5200 meters, nominally consisting of…
Commissioning the CMB polarization telescope GroundBIRD with the full set of detectors
Miku Tsujii, Jochem J. A. Baselmans, Jihoon Choi +39
GroundBIRD is a ground-based cosmic microwave background (CMB) experiment for observing the polarization pattern imprinted on large angular scales ( ) from the Teide Obse…
Nuclear Spin Metrology with Nitrogen Vacancy Center in Diamond for Axion Dark Matter Detection
So Chigusa, Masashi Hazumi, Ernst David Herbschleb +3
We present a method to directly detect the axion dark matter using nitrogen vacancy centers in diamonds. In particular, we use metrology leveraging the nuclear spin of nitrogen to…
The LiteBIRD mission to explore cosmic inflation
T. Ghigna, A. Adler, K. Aizawa +156
LiteBIRD, the next-generation cosmic microwave background (CMB) experiment, aims for a launch in Japan's fiscal year 2032, marking a major advancement in the exploration of primord…
Development of the Low Frequency Telescope focal plane detector arrays for LiteBIRD
Tommaso Ghigna, Aritoki Suzuki, Benjamin Westbrook +12
LiteBIRD, a forthcoming JAXA mission, aims to accurately study the microwave sky within the 40-400 GHz frequency range divided into 15 distinct nominal bands. The primary objective…
A Method of Measuring TES Complex ETF Response in Frequency-domain Multiplexed Readout by Single Sideband Power Modulation
Yu Zhou, Tijmen de Haan, Hiroki Akamatsu +5
The digital frequency domain multiplexing (DfMux) technique is widely used for astrophysical instruments with large detector arrays. Detailed detector characterization is required…
Exploration of the polarization angle variability of the Crab Nebula with POLARBEAR and its application to the search for axion-like particles
Shunsuke Adachi, Tylor Adkins, Carlo Baccigalupi +23
The Crab Nebula, also known as Tau A, is a polarized astronomical source at millimeter wavelengths. It has been used as a stable light source for polarization angle calibration in…