Fabrication of Detector Arrays for the SPT-3G Receiver
The South Pole Telescope third-generation (SPT-3G) receiver was installed during the austral summer of 2016-2017. It is designed to measure the cosmic microwave background across three frequency bands centered at 95, 150, and 220 GHz. The SPT-3G receiver has ten focal plane modules, each with 269 pixels. Each pixel features a broadband sinuous antenna coupled to a niobium microstrip transmission line. In-line filters define the desired band-passes before the signal is coupled to six bolometers with Ti/Au/Ti/Au transition edge sensors (three bands x two polarizations). In total, the SPT-3G receiver is composed of 16,000 detectors, which are read out using a 68 x frequency-domain multiplexing scheme. In this paper, we present the process employed in fabricating the detector arrays.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1488564
- Journal Information:
- Journal of Low Temperature Physics, Vol. 193, Issue 5-6; ISSN 0022-2291
- Publisher:
- Plenum Press
- Country of Publication:
- United States
- Language:
- English
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