Abstract
In this paper we present the results of our 176-pixel prototype of the FDM readout system for SAFARI, a TES-based focal-plane instrument for the far-IR SPICA mission. We have implemented the knowledge obtained from the detailed study on electrical crosstalk reported previously. The effect of carrier leakage is reduced by a factor two, mutual impedance is reduced to below 1 nH and mutual inductance is removed. The pixels are connected in stages, one quarter of the array half of the array and the full array, to resolve intermediate technical issues. A semi-automated procedure was incorporated to find all optimal settings for all pixels. And as a final step the complete array has been connected and 132 pixels have been read out simultaneously within the frequency range of 1-3.8MHz with an average frequency separation of 16kHz. The noise was found to be detector limited and was not affected by reading out all pixels in a FDM mode. With this result the concept of using FDM for multiplexed bolometer read out for the SAFARI instrument has been demonstrated.
Original language | English |
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Title of host publication | Proceedings of SPIE |
Subtitle of host publication | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII |
Editors | J. Zmuidzinas, W.S. Holland |
Publisher | SPIE |
Volume | 9914 |
ISBN (Electronic) | 978-151060207-6 |
DOIs | |
Publication status | Published - 2016 |
Event | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII - Edinburgh, United Kingdom Duration: 28 Jun 2016 → 1 Jul 2016 |
Conference
Conference | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII |
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Country/Territory | United Kingdom |
City | Edinburgh |
Period | 28/06/16 → 1/07/16 |
Keywords
- Bolometers
- FDM
- Readout
- SAFARI
- SPICA
- TES