Characterization of the Mid-Frequency Arrays for Advanced ACTPol

Abstract

The Advanced ACTPol upgrade on the Atacama Cosmology Telescope aims to improve the measurement of the cosmic microwave background anisotropies and polarization, using four new dichroic detector arrays fabricated on 150-mm silicon wafers. These bolometric cameras use AlMn transition-edge sensors, coupled to feedhorns with orthomode transducers for polarization sensitivity. The first deployed camera is sensitive to both 150 GHz and 230 GHz. Here we present the lab characterization of the thermal parameters and optical efficiencies for the two newest fielded arrays, each sensitive to both 90 GHz and 150 GHz. We provide assessments of the parameter uniformity across each array with evaluation of systematic uncertainties. Lastly, we show the arrays' initial performance in the field.

Version accepted for publication by Journal of Low Temperature Physics

References in corpus (4)

• Advanced ACTPol Cryogenic Detector Arrays and Readout
• The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
• Infrared dielectric properties of low-stress silicon nitride
• The Atacama Cosmology Telescope: Beam Measurements and the Microwave Brightness Temperatures of Uranus and Saturn

Cited by in corpus (34)

• The Atacama Cosmology Telescope: A Catalog of > 4000 Sunyaev-Zel'dovich Galaxy Clusters
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz
• The Simons Observatory: Instrument Overview
• The Simons Observatory microwave SQUID multiplexing detector module design
• The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center
• Highly-multiplexed microwave SQUID readout using the SLAC Microresonator Radio Frequency (SMuRF) Electronics for Future CMB and Sub-millimeter Surveys
• The Atacama Cosmology Telescope: Detection of mm-wave transient sources
• Transition Edge Sensors: Physics and Applications
• The Atacama Cosmology Telescope: A search for Planet 9
• The Atacama Cosmology Telescope: Map-Based Noise Simulations for DR6
• The Atacama Cosmology Telescope: Modeling Bulk Atmospheric Motion
• Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey: I. Evidence for thermal energy anisotropy using oriented stacking
• Low Temperature Detectors for CMB Imaging Arrays
• The Design of The CCAT-prime Epoch of Reionization Spectrometer Instrument
• The Kinematic Sunyaev-Zel'dovich Effect with ACT, DES, and BOSS: a Novel Hybrid Estimator
• The Atacama Cosmology Telescope: Systematic Transient Search of 3-Day Maps
• Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays
• Characterization of Transition Edge Sensors for the Simons Observatory
• Demonstration of 220/280 GHz Multichroic Feedhorn-Coupled TES Polarimeter
• Optical modeling of systematic uncertainties in detector polarization angles for the Atacama Cosmology Telescope
• The Atacama Cosmology Telescope: Semi-Analytic Covariance Matrices for the DR6 CMB Power Spectra
• The Atacama Cosmology Telescope: Flux Upper Limits from a Targeted Search for Extragalactic Transients
• In situ Performance of the Low Frequency Arrayfor Advanced ACTPol
• Simons Observatory Focal-Plane Module: In-lab Testing and Characterization Program
• The Simons Observatory: Project Overview
• The Simons Observatory: Magnetic Shielding Measurements for the Universal Multiplexing Module
• Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey: II. Anisotropic large-scale coherence in hot gas, galaxies, and dark matter
• Deciphering Baryonic Feedback from ACT tSZ Galaxy Clusters
• The cross correlation of the ABS and ACT maps
• The Atacama Cosmology Telescope: Quantifying Atmospheric Emission above Cerro Toco
• The Atacama Cosmology Telescope: Systematic Transient Search of Single Observation Maps
• Design and Validation of a Cold Load for Characterization of CMB-S4 Detectors
• The Simons Observatory: Differentiating Thermal and Optical Effects in Superconducting Transition-Edge Sensing Bolometers
• Development of a Temperature-Variable Cold Blackbody Calibrator for Millimeter and Submillimeter Wave Detectors