23 research outputs found
The Simons Observatory Large Aperture Telescope Receiver
The Simons Observatory (SO) Large Aperture Telescope Receiver (LATR) will be
coupled to the Large Aperture Telescope located at an elevation of 5,200 m on
Cerro Toco in Chile. The resulting instrument will produce arcminute-resolution
millimeter-wave maps of half the sky with unprecedented precision. The LATR is
the largest cryogenic millimeter-wave camera built to date with a diameter of
2.4 m and a length of 2.6 m. It cools 1200 kg of material to 4 K and 200 kg to
100 mk, the operating temperature of the bolometric detectors with bands
centered around 27, 39, 93, 145, 225, and 280 GHz. Ultimately, the LATR will
accommodate 13 40 cm diameter optics tubes, each with three detector wafers and
a total of 62,000 detectors. The LATR design must simultaneously maintain the
optical alignment of the system, control stray light, provide cryogenic
isolation, limit thermal gradients, and minimize the time to cool the system
from room temperature to 100 mK. The interplay between these competing factors
poses unique challenges. We discuss the trade studies involved with the design,
the final optimization, the construction, and ultimate performance of the
system
Snowmass 2021 CMB-S4 White Paper
This Snowmass 2021 White Paper describes the Cosmic Microwave Background Stage 4 project CMB-S4, which is designed to cross critical thresholds in our understanding of the origin and evolution of the Universe, from the highest energies at the dawn of time through the growth of structure to the present day. We provide an overview of the science case, the technical design, and project plan
CMB-S4
We describe the stage 4 cosmic microwave background ground-based experiment CMB-S4
The Simons Observatory: Design, integration, and testing of the small aperture telescopes
International audienceThe Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5,200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes to a sensitivity of , with quantified systematic errors well below this value. Each SAT is a self-contained cryogenic telescope with a 35 field of view, 42 cm diameter optical aperture, 40 K half-wave plate, 1 K refractive optics, and TES detectors. We describe the nominal design of the SATs and present details about the integration and testing for one operating at 93 and 145 GHz
The Simons Observatory: Design, integration, and testing of the small aperture telescopes
International audienceThe Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5,200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes to a sensitivity of , with quantified systematic errors well below this value. Each SAT is a self-contained cryogenic telescope with a 35 field of view, 42 cm diameter optical aperture, 40 K half-wave plate, 1 K refractive optics, and TES detectors. We describe the nominal design of the SATs and present details about the integration and testing for one operating at 93 and 145 GHz
Recommended from our members
The Simons Observatory: Astro2020 Decadal Project Whitepaper
The Simons Observatory (SO) is a ground-based cosmic microwave background
(CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that
promises to provide breakthrough discoveries in fundamental physics, cosmology,
and astrophysics. Supported by the Simons Foundation, the Heising-Simons
Foundation, and with contributions from collaborating institutions, SO will see
first light in 2021 and start a five year survey in 2022. SO has 287
collaborators from 12 countries and 53 institutions, including 85 students and
90 postdocs.
The SO experiment in its currently funded form ('SO-Nominal') consists of
three 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture
Telescope (LAT). Optimized for minimizing systematic errors in polarization
measurements at large angular scales, the SATs will perform a deep,
degree-scale survey of 10% of the sky to search for the signature of primordial
gravitational waves. The LAT will survey 40% of the sky with arc-minute
resolution. These observations will measure (or limit) the sum of neutrino
masses, search for light relics, measure the early behavior of Dark Energy, and
refine our understanding of the intergalactic medium, clusters and the role of
feedback in galaxy formation.
With up to ten times the sensitivity and five times the angular resolution of
the Planck satellite, and roughly an order of magnitude increase in mapping
speed over currently operating ("Stage 3") experiments, SO will measure the CMB
temperature and polarization fluctuations to exquisite precision in six
frequency bands from 27 to 280 GHz. SO will rapidly advance CMB science while
informing the design of future observatories such as CMB-S4
Recommended from our members
CMB-S4 Decadal Survey APC White Paper
We provide an overview of the science case, instrument configuration and
project plan for the next-generation ground-based cosmic microwave background
experiment CMB-S4, for consideration by the 2020 Decadal Survey
Recommended from our members
CMB-S4 Science Case, Reference Design, and Project Plan
We present the science case, reference design, and project plan for the
Stage-4 ground-based cosmic microwave background experiment CMB-S4
CMB-S4 Decadal Survey APC White Paper
International audienceWe provide an overview of the science case, instrument configuration and project plan for the next-generation ground-based cosmic microwave background experiment CMB-S4, for consideration by the 2020 Decadal Survey
CMB-S4 Science Case, Reference Design, and Project Plan
We present the science case, reference design, and project plan for the Stage-4 ground-based cosmic microwave background experiment CMB-S4