A5040600453- Superconducting and THz Device Technology
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- GNSS positioning and interference
Princeton University
2024-2025
McGill University
2022
We present the requirements, design, and evaluation of cryogenic continuously rotating half-wave plate (CHWP) for Simons Observatory (SO). SO is a cosmic microwave background polarization experiment at Parque Astronómico de Atacama in northern Chile that covers wide range angular scales using both small (⌀0.42 m) large (⌀6 aperture telescopes. In particular, telescopes (SATs) focus on primordial B-mode polarization. To this end, SATs employ CHWP to modulate incident light 8 Hz, suppressing...
Recent measurements from the CMB and high-redshift galaxy observations have placed rough constraints on midpoint duration of Epoch Reionization. Detailed ionization history remain elusive, although two proposed probes show great promise for this purpose: 21cm global signal kinetic Sunyaev-Zel'dovich (kSZ) effect. We formally confirm common assumption that these are highly complementary, with kSZ being more sensitive to extended histories rapidly evolving ones. do so by performing a...
We present the requirements, design and evaluation of cryogenic continuously rotating half-wave plate (CHWP) for Simons Observatory (SO). SO is a cosmic microwave background (CMB) polarization experiment at Parque Astron\'{o}mico Atacama in northern Chile that covers wide range angular scales using both small (0.42 m) large (6 aperture telescopes. In particular, telescopes (SATs) focus on primordial B-mode polarization. To this end, SATs employ CHWP to modulate incident light 8~Hz,...