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Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol
- Publication Year :
- 2016
- Publisher :
- arXiv, 2016.
-
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.<br />Comment: 17 pages, 6 figures. To be published in Proc. SPIE. Presented at SPIE Astronomical Telescopes + Instrumentation Conference 9914: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, July 2016
- Subjects :
- Transition-Edge Sensors
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics::Instrumentation and Detectors
Cosmic microwave background
FOS: Physical sciences
Multiplexing Factor
Condensed Matter Physic
01 natural sciences
Multiplexing
law.invention
010309 optics
Optics
law
Transition-Edge Sensor
0103 physical sciences
Cosmic Microwave Background
Electronic
Optical and Magnetic Materials
Electrical and Electronic Engineering
010306 general physics
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Computer Science::Information Theory
Physics
Pixel
business.industry
Applied Mathematics
Detector
Bolometer
Time-division SQUID Multiplexing
Astrophysics::Instrumentation and Methods for Astrophysics
Optical and Magnetic Material
Computer Science Applications1707 Computer Vision and Pattern Recognition
Condensed Matter Physics
SQUID
Applied Mathematic
Electronic, Optical and Magnetic Materials
Atacama Cosmology Telescope
Transition edge sensor
business
Astrophysics - Instrumentation and Methods for Astrophysics
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....aeb7bb2b29410e3dff0b91835a92f4e2
- Full Text :
- https://doi.org/10.48550/arxiv.1607.06064