Advanced ACTPol TES Device Parameters and Noise Performance in Fielded
  Arrays
  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.
