Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays

Abstract

The Advanced ACTPol (AdvACT) upgrade to the Atacama Cosmology Telescope (ACT) features arrays of aluminum manganese transition-edge sensors (TESes) optimized for ground-based observations of the Cosmic Microwave Background (CMB). Array testing shows highly responsive detectors with anticipated in-band noise performance under optical loading. We report on TES parameters measured with impedance data taken on a subset of TESes. We then compare modeled noise spectral densities to measurements. We find excess noise at frequencies around 100 Hz, nearly outside of the signal band of CMB measurements. In addition, we describe full-array noise measurements in the laboratory and in the field for two new AdvACT mid-frequency arrays, sensitive at bands centered on 90 and 150 GHz, and data for the high-frequency array (150/230 GHz) as deployed.

arXiv commentAccepted for publication in Journal of Low Temperature Physics for LTD-17 special issue

References in corpus (7)

• Advanced ACTPol Cryogenic Detector Arrays and Readout
• The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
• Characterization of the Mid-Frequency Arrays for Advanced ACTPol
• Survey strategy optimization for the Atacama Cosmology Telescope
• Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol
• Complex impedance measurements of calorimeters and bolometers: correction for stray impedances
• A Study of Al-Mn Transition Edge Sensor Engineering for Stability

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• Out-of-equilibrium nonlinear model of thermoelectricity in superconducting tunnel junctions
• Characterising the optical response of ultra-low-noise far-infrared 60-110 $\mu$m transition edge sensors
• Correlating Visual Characteristics and Cryogenic Performance of Superconducting Detectors