The Simons Observatory Large Aperture Telescope Receiver

Abstract

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.

References in corpus (48)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• The Simons Observatory: Science goals and forecasts
• Planck 2018 results. V. CMB power spectra and likelihoods
• The 10 Meter South Pole Telescope
• BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
• A CMB Polarization Primer
• Advanced ACTPol Cryogenic Detector Arrays and Readout
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz
• The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
• Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR experiment
• The Atacama Cosmology Telescope: The Two-Season ACTPol Sunyaev-Zel'dovich Effect Selected Cluster Catalog
• The POLARBEAR-2 and the Simons Array Experiment
• A Measurement of the Cosmic Microwave Background Gravitational Lensing Potential from 100 Square Degrees of SPTpol Data
• Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data
• A Measurement of the Cosmic Microwave Background Lensing Potential and Power Spectrum from 500 deg${}^2$ of SPTpol Temperature and Polarization Data
• Large-aperture wide-bandwidth antireflection-coated silicon lenses for millimeter wavelengths
• $\Lambda$CDM Cosmology for Astronomers
• The Cosmology Large Angular Scale Surveyor
• The CUORE cryostat: an infrastructure for rare event searches at millikelvin temperatures
• A Measurement of the Degree Scale CMB B-mode Angular Power Spectrum with POLARBEAR
• The Simons Observatory: Instrument Overview
• SPIDER: CMB polarimetry from the edge of space
• Results from the Atacama B-mode Search (ABS) Experiment
• A Microwave SQUID Multiplexer Optimized for Bolometric Applications
• A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing
• The optical design of the six-meter CCAT-prime and Simons Observatory telescopes
• Detection of Galactic and Extragalactic Millimeter-Wavelength Transient Sources with SPT-3G
• The Simons Observatory: Modeling Optical Systematics in the Large Aperture Telescope
• The Atacama Cosmology Telescope: Detection of mm-wave transient sources
• The Thermal Design, Characterization, and Performance of the SPIDER Long-Duration Balloon Cryostat
• Small Aperture Telescopes for the Simons Observatory
• Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: 40 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance
• The Simons Observatory: Metamaterial Microwave Absorber (MMA) and its Cryogenic Applications
• Simons Observatory Microwave SQUID Multiplexing Readout -- Cryogenic RF Amplifier and Coaxial Chain Design
• BoloCalc: a sensitivity calculator for the design of Simons Observatory
• Optical Characterization of the SPT-3G Focal Plane
• Pushing the Limits of Broadband and High Frequency Metamaterial Silicon Antireflection Coatings
• Design and Fabrication of Metamaterial Anti-Reflection Coatings for the Simons Observatory
• Broadband anti-reflective coatings for cosmic microwave background experiments
• The Simons Observatory: Overview of data acquisition, control, monitoring, and computer infrastructure
• Simons Observatory large aperture receiver simulation overview
• Studies of Systematic Uncertainties for Simons Observatory: Optical Effects and Sensitivity Considerations
• The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results
• The Integration and Testing Program for the Simons Observatory Large Aperture Telescope Optics Tubes
• Cooldown Strategies and Transient Thermal Simulations for the Simons Observatory

Cited by in corpus (22)

• The Simons Observatory microwave SQUID multiplexing detector module design
• The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center
• The conceptual design of the 50-meter Atacama Large Aperture Submillimeter Telescope (AtLAST)
• The Simons Observatory 220 and 280 GHz Focal-Plane Module: Design and Initial Characterization
• The Simons Observatory: A fully remote controlled calibration system with a sparse wire grid for cosmic microwave background telescopes
• The Simons Observatory: Characterizing the Large Aperture Telescope Receiver with Radio Holography
• The Atacama Cosmology Telescope: Flux Upper Limits from a Targeted Search for Extragalactic Transients
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Resolving the Hot and Ionized Universe through the Sunyaev-Zeldovich effect
• The Simons Observatory: impact of bandpass, polarization angle and calibration uncertainties on small-scale power spectrum analysis
• The Simons Observatory: Magnetic Shielding Measurements for the Universal Multiplexing Module
• The Simons Observatory: Design, Optimization, and Performance of Low Frequency Detectors
• The Simons Observatory: Studies of Detector Yield and Readout Noise From the First Large-Scale Deployment of Microwave Multiplexing at the Large Aperture Telescope
• Anti-reflection coating with mullite and Duroid for large-diameter cryogenic sapphire and alumina optics
• The Simons Observatory: Alarms and Detector Quality Monitoring
• The Simons Observatory: Dark Characterization of the Large Aperture Telescope
• The Atacama Cosmology Telescope: Systematic Transient Search of Single Observation Maps
• The Simons Observatory: Design and Measured Performance of a Carbon Fiber Strut for a Cryogenic Truss
• The Simons Observatory: A Minimum-Cost Matching Algorithm for Pairing Measured Resonances with Designed Detectors
• CCAT: A status update on the EoR-Spec instrument module for Prime-Cam
• The Simons Observatory: Quantifying the impact of beam chromaticity on large-scale B-mode science
• The Simons Observatory: Studies of Phase Drift in RF Transmission Lines from the First Large-Scale Deployment of Microwave Frequency Multiplexing for Cosmology
• Simons Observatory: Broadband Metamaterial Anti-Reflection Cuttings for Large Aperture Alumina Optics