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Measurements of tropospheric ice clouds with a ground-based CMB polarization experiment, POLARBEAR
Satoru Takakura, Mario A. O. Aguilar-Faúndez, Yoshiki Akiba +45
The polarization of the atmosphere has been a long-standing concern for ground-based experiments targeting cosmic microwave background (CMB) polarization. Ice crystals in upper tro…
Studies of Systematic Uncertainties for Simons Observatory: Detector Array Effects
Kevin T. Crowley, Sara M. Simon, Max Silva-Feaver +36
In this proceeding, we present studies of instrumental systematic effects for the Simons Obsevatory (SO) that are associated with the detector system and its interaction with the f…
Year two instrument status of the SPT-3G cosmic microwave background receiver
A. N. Bender, P. A. R. Ade, Z. Ahmed +86
The South Pole Telescope (SPT) is a millimeter-wavelength telescope designed for high-precision measurements of the cosmic microwave background (CMB). The SPT measures both the tem…
Characterization and performance of the second-year SPT-3G focal plane
D. Dutcher, P. A. R. Ade, Z. Ahmed +68
The third-generation instrument for the 10-meter South Pole Telescope, SPT-3G, was first installed in January 2017. In addition to completely new cryostats, secondary telescope opt…
Design and characterization of the SPT-3G receiver
J. A. Sobrin, P. A. R. Ade, Z. Ahmed +68
The SPT-3G receiver was commissioned in early 2017 on the 10-meter South Pole Telescope (SPT) to map anisotropies in the cosmic microwave background (CMB). New optics, detector, an…
Broadband anti-reflective coatings for cosmic microwave background experiments
A. Nadolski, A. M. Kofman, J. D. Vieira +71
The desire for higher sensitivity has driven ground-based cosmic microwave background (CMB) experiments to employ ever larger focal planes, which in turn require larger reimaging o…
Studies of Systematic Uncertainties for Simons Observatory: Optical Effects and Sensitivity Considerations
Patricio A. Gallardo, Jon Gudmundsson, Brian J. Koopman +32
The Simons Observatory (SO) is a new experiment that aims to measure the cosmic microwave background (CMB) in temperature and polarization. SO will measure the polarized sky over a…
The Simons Observatory: Instrument Overview
Nicholas Galitzki, Aamir Ali, Kam S. Arnold +75
The Simons Observatory (SO) will make precise temperature and polarization measurements of the cosmic microwave background (CMB) using a set of telescopes which will cover angular…
The Simons Observatory: Science goals and forecasts
The Simons Observatory Collaboration, Peter Ade, James Aguirre +247
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scient…
BoloCalc: a sensitivity calculator for the design of Simons Observatory
Charles A. Hill, Sarah Marie M. Bruno, Sara M. Simon +34
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…
A large-diameter cryogenic rotation stage for half-wave plate polarization modulation on the POLARBEAR-2 experiment
Charles A. Hill, Akito Kusaka, Paul Barton +15
We describe the design of a cryogenic rotation stage (CRS) for use with the cryogenic half-wave plate (CHWP) polarization modulator on the POLARBEAR-2b and POLARBEAR-2c (PB2b/c) co…
Optical Characterization of the SPT-3G Focal Plane
Zhaodi Pan, Peter Ade, Zeeshan Ahmed +73
The third-generation South Pole Telescope camera is designed to measure the cosmic microwave background across three frequency bands (95, 150 and 220 GHz) with ~16,000 transition-e…
Developments of highly-multiplexed, multi-chroic pixels for Balloon-Borne Platforms
François Aubin, Shaul Hanany, Bradley R. Johnson +4
We present our work to develop and characterize low thermal conductance bolometers that are part of sinuous antenna multi-chroic pixels (SAMP). We use longer, thinner and meandered…
Commercialization of micro-fabrication of antenna-coupled Transition Edge Sensor bolometer detectors for studies of the Cosmic Microwave Background
Aritoki Suzuki, Chris Bebek, Maurice Garcia-Sciveres +6
We report on the development of commercially fabricated multi-chroic antenna coupled Transition Edge Sensor (TES) bolometer arrays for Cosmic Microwave Background (CMB) polarimetry…
Hierarchical sinuous-antenna phased array for millimeter wavelengths
Ari Cukierman, Adrian T. Lee, Christopher Raum +2
We present the design, fabrication and measured performance of a hierarchical sinuous-antenna phased array coupled to superconducting transition-edge-sensor (TES) bolometers for mi…