The Simons Observatory (SO) is an upcoming experiment that will study temperature and polarization fluctuations in the cosmic microwave background (CMB) from the Atacama Desert in Chile. SO will field both a large aperture telescope (LAT) and an array of small aperture telescopes (SATs) that will observe in six bands with center frequencies spanning from 27 to 270 GHz. Key considerations during the SO design phase are vast, including the number of cameras per telescope, focal plane magnification and pixel density, in-band optical power and camera throughput, detector parameter tolerances, and scan strategy optimization. To inform the SO design in a rapid, organized, and traceable manner, we have created a Python-based sensitivity calculator with several state-of-the-art features, including detector-to-detector optical white-noise correlations, a handling of simulated and measured bandpasses, and propagation of low-level parameter uncertainties to uncertainty in on-sky noise performance. We discuss the mathematics of the sensitivity calculation, the calculator's object-oriented structure and key features, how it has informed the design of SO, and how it can enhance instrument design in the broader CMB community, particularly for CMB-S4.
|Title of host publication||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX|
|Editors||Jonas Zmuidzinas, Jian-Rong Gao|
|Publication status||Published - 2018|
|Event||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 - Austin, United States|
Duration: 12 Jun 2018 → 15 Jun 2018
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Conference||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018|
|Period||12/06/18 → 15/06/18|
Bibliographical noteFunding Information:
This work was supported in part by a grant from the Simons Foundation (Award #457687, B.K.). We thank Scott Paine and Denis Barkats (Harvard University) for providing the atmospheric profiles for the Atacama and South Pole sites that are input into the AM simulations.
© 2018 SPIE.
- Cosmic microwave background
- mapping speed
- noise-equivalent temperature
- Simons Observatory