@inproceedings{fb40a1494b48460fbdeeed009798c855,
title = "Characterization of AlMn TES impedance, noise, and optical efficiency in the first 150 mm multichroic array for Advanced ACTPol",
abstract = "The Advanced ACTPol (AdvACT) upgrade to the Atacama Cosmology Telescope features large arrays of multichroic pixels consisting of two orthogonal-polarization pairs of superconducting bolometers at two observing frequency bands. We present measurements of the detector properties and noise data in a subset of a fielded multichroic array of AlMn transition-edge sensor (TES) detectors. In this array, the distribution of critical temperature Tc across detectors appears uniform at the percent level. The measured noise-equivalent power (NEP) distributions over ~ 1200 detectors are consistent with expectations. We find median NEPs of 4.0×10-17 √Hz for low-band detectors and 6.2×10-17√Hz for high-band detectors under covered-window telescope test conditions with optical loading comparable to observing with precipitable water vapor ~ 0.5 mm. Lastly, we show the estimated detector optical efficiency, and demonstrate the ability to perform optical characterization over hundreds of detectors at once using a cryogenic blackbody source.",
keywords = "Bolometers, CMB, Electrothermal model, Transition edge sensors",
author = "Crowley, {Kevin T.} and Choi, {Steve K.} and Jeffrey Kuan and Austermann, {Jason A.} and Beall, {James A.} and Rahul Datta and Duff, {Shannon M.} and Gallardo, {Patricio A.} and Matthew Hasselfield and Henderson, {Shawn W.} and Ho, {Shuay Pwu P.} and Koopman, {Brian J.} and Niemack, {Michael D.} and Maria Salatino and Simon, {Sara M.} and Staggs, {Suzanne T.} and Wollack, {Edward J.}",
note = "Publisher Copyright: {\textcopyright} 2016 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII ; Conference date: 28-06-2016 Through 01-07-2016",
year = "2016",
doi = "10.1117/12.2231999",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Jonas Zmuidzinas and Holland, {Wayne S.}",
booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII",
address = "United States",
}