The Simons Observatory: Design, Optimization, and Performance of Low-Frequency Detectors

The Simons Observatory (SO) is a cosmic microwave background (CMB) experiment located in the Atacama Desert in Chile that will make precise temperature and polarization measurements over six spectral bands ranging from 27 to 285 GHz. Three small aperture telescopes (SATs) and one large aperture telescope (LAT) will house <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>∼</mml:mo></mml:math> 60,000 detectors and cover angular scales between one arcminute and tens of degrees. We present the performance of the dichroic, low-frequency (LF) lenslet-coupled sinuous antenna transition-edge sensor (TES) bolometer arrays with bands centered at 27 and 39 GHz. The LF focal plane will primarily characterize Galactic synchrotron emission as a critical part of foreground subtraction from CMB data. We will discuss the design, optimization, and current testing status of these pixels.

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Publication Details

Journal
Journal of Low Temperature Physics
Published
2024-11-15
DOI
https://doi.org/10.1007/s10909-024-03234-7
Citations
2
Primary Topic
Superconducting and THz Device Technology
Type
article
Field-Weighted Citation Impact
0.66

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The Simons Observatory: Design, Optimization, and Performance of Low-Frequency Detectors

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article en
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Abstract

The Simons Observatory (SO) is a cosmic microwave background (CMB) experiment located in the Atacama Desert in Chile that will make precise temperature and polarization measurements over six spectral bands ranging from 27 to 285 GHz. Three small aperture telescopes (SATs) and one large aperture telescope (LAT) will house <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>∼</mml:mo></mml:math> 60,000 detectors and cover angular scales between one arcminute and tens of degrees. We present the performance of the dichroic, low-frequency (LF) lenslet-coupled sinuous antenna transition-edge sensor (TES) bolometer arrays with bands centered at 27 and 39 GHz. The LF focal plane will primarily characterize Galactic synchrotron emission as a critical part of foreground subtraction from CMB data. We will discuss the design, optimization, and current testing status of these pixels.

Journal of Low Temperature PhysicsVol. 218(1-2)
Lawrence Berkeley National Laboratory (US), Princeton University (US), University of California San Diego (US), University of Virginia (US), University of California, Berkeley (US)
Simons Foundation
Openalex Percentile: Top 27%
Superconducting and THz Device Technology
0.66
DOIOpen Access PDFOpenAlex
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