@inproceedings{70fbb8bebff842a0bc6b2b4a258a7eb1,
title = "Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol",
abstract = "Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale angular resolution. To achieve its science goals, Advanced ACTPol utilizes a larger readout multiplexing factor than any previous CMB experiment to measure detector arrays with approximately two thousand transition-edge sensor (TES) bolometers in each 150 mm detector wafer. We present the implementation and testing of the Advanced ACTPol time-division multiplexing readout architecture with a 64-row multiplexing factor. This includes testing of individual multichroic detector pixels and superconducting quantum interference device (SQUID) multiplexing chips as well as testing and optimizing of the integrated readout electronics. In particular, we describe the new automated multiplexing SQUID tuning procedure developed to select and optimize the thousands of SQUID parameters required to readout each Advanced ACTPol array. The multichroic detector pixels in each array use separate channels for each polarization and each of the two frequencies, such that four TESes must be read out per pixel. Challenges addressed include doubling the number of detectors per multiplexed readout channel compared to ACTPol and optimizing the Nyquist inductance to minimize detector and SQUID noise aliasing.",
keywords = "Cosmic Microwave Background, Multiplexing Factor, Time-division SQUID Multiplexing, Transition-Edge Sensors",
author = "Henderson, {Shawn W.} and Stevens, {Jason R.} and Mandana Amiri and Jason Austermann and Beall, {James A.} and Saptarshi Chaudhuri and Cho, {Hsiao Mei} and Choi, {Steve K.} and Cothard, {Nicholas F.} and Crowley, {Kevin T.} and Duff, {Shannon M.} and Fitzgerald, {Colin P.} and Gallardo, {Patricio A.} and Mark Halpern and Matthew Hasselfield and Gene Hilton and Ho, {Shuay Pwu Patty} and Johannes Hubmayr and Irwin, {Kent D.} and Koopman, {Brian J.} and Dale Li and Yaqiong Li and Jeff McMahon and Federico Nati and Michael Niemack and Reintsema, {Carl D.} and Maria Salatino and Alessandro Schillaci and Schmitt, {Benjamin L.} and Simon, {Sara M.} and Staggs, {Suzanne T.} and Vavagiakis, {Eve M.} and Ward, {Jonathan T.}",
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 = "10.1117/12.2233895",
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",
}