Small Aperture Telescopes for the Simons Observatory

Abstract

The Simons Observatory (SO) is an upcoming cosmic microwave background (CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in temperature and polarization in six frequency bands spanning 27 to 285 GHz. SO will consist of one 6-meter Large Aperture Telescope (LAT) fielding $\sim$30,000 detectors and an array of three 0.42-meter Small Aperture Telescopes (SATs) fielding an additional 30,000 detectors. This synergy will allow for the extremely sensitive characterization of the CMB over angular scales ranging from an arcmin to tens of degrees, enabling a wide range of scientific output. Here we focus on the SATs targeting degree angular scales with successive dichroic instruments observing at Mid-Frequency (MF: 93/145 GHz), Ultra-High-Frequency (UHF: 225/285 GHz), and Low-Frequency (LF: 27/39 GHz). The three SATs will be able to map $\sim$10% of the sky to a noise level of 2 $\mu$K-arcmin when combining 93 and 145 GHz. The multiple frequency bands will allow the CMB to be separated from galactic foregrounds (primarily synchrotron and dust), with the primary science goal of characterizing the primordial tensor-to-scalar ratio, $r$, at a target level of $\sigma \left(r\right)\approx 0.003$.

References in corpus (21)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• The Simons Observatory: Science goals and forecasts
• Signature of Gravity Waves in Polarization of the Microwave Background
• A Probe of Primordial Gravity Waves and Vorticity
• The Quest for B Modes from Inflationary Gravitational Waves
• Detection of B-mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope
• A Measurement of the Cosmic Microwave Background B-Mode Polarization Power Spectrum at Sub-Degree Scales with POLARBEAR
• Analysis of CMB polarization on an incomplete sky
• E/B decomposition of finite pixelized CMB maps
• Delensing the CMB with the Cosmic Infrared Background
• Demonstration of cosmic microwave background delensing using the cosmic infrared background
• BICEP2 III: Instrumental Systematics
• Cosmological Inflation: Theory and Observations
• Characterization of foreground emission at degree angular scale for CMB B-modes observations. Thermal Dust and Synchrotron signal from Planck and WMAP data
• Performance of a continuously rotating half-wave plate on the POLARBEAR telescope
• Results from the Atacama B-mode Search (ABS) Experiment
• Absolute calibration of the polarisation angle for future CMB $B$-mode experiments from current and future measurements of the Crab nebula
• A Projected Estimate of the Reionization Optical Depth Using the CLASS Experiment's Sample-Variance Limited E-Mode Measurement
• Simons Observatory Microwave SQUID Multiplexing Readout -- Cryogenic RF Amplifier and Coaxial Chain Design
• Pushing the Limits of Broadband and High Frequency Metamaterial Silicon Antireflection Coatings
• A large-diameter cryogenic rotation stage for half-wave plate polarization modulation on the POLARBEAR-2 experiment

Cited by in corpus (19)

• The Simons Observatory microwave SQUID multiplexing detector module design
• The Simons Observatory Large Aperture Telescope Receiver
• The Simons Observatory: Galactic Science Goals and Forecasts
• The Simons Observatory: Metamaterial Microwave Absorber (MMA) and its Cryogenic Applications
• A cryogenic continuously rotating half-wave plate for the POLARBEAR-2b cosmic microwave background receiver
• Cosmology from weak lensing, galaxy clustering, CMB lensing and tSZ: I. 10x2pt Modelling Methodology
• QUBIC VIII: Optical design and performance
• The Simons Observatory: A fully remote controlled calibration system with a sparse wire grid for cosmic microwave background telescopes
• The Simons Observatory: the Large Aperture Telescope (LAT)
• The Simons Observatory: Characterizing the Large Aperture Telescope Receiver with Radio Holography
• Broadband multi-layer anti-reflection coatings with mullite and duroid for half-wave plates and alumina filters for CMB polarimetry
• The Simons Observatory: Beam characterization for the Small Aperture Telescopes
• The Simons Observatory: Magnetic Shielding Measurements for the Universal Multiplexing Module
• Anti-reflection coating with mullite and Duroid for large-diameter cryogenic sapphire and alumina optics
• The Simons Observatory: Design, Optimization, and Performance of Low Frequency Detectors
• Modified crossed Dragone optical design of the LiteBIRD low-frequency telescope
• CCAT-prime: Characterization of the First 280 GHz MKID Array for Prime-Cam
• The Simons Observatory: laboratory beam characterization for the first small aperture telescope
• The Simons Observatory: HoloSim-ML: machine learning applied to the efficient analysis of radio holography measurements of complex optical systems