Development of an optical detector testbed for the Simons Observatory

Seibert, Joseph, Ade, Peter ORCID: https://orcid.org/0000-0002-5127-0401, Ali, Aamir M., Arnold, Kam, Cothard, Nicholas F., Galitzki, Nicholas, Harrington, Kathleen, Ho, Shuay-Pwu Patty, Keating, Brian, Lowry, Lindsay Ng., Russell, Megan, Silva-Feaver, Maximiliano, Siritanasak, Praween, Teply, Grant P., Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918, Vavagiakis, Eve M. and Xu, Zhilei 2020. Development of an optical detector testbed for the Simons Observatory. Presented at: SPIE Astronomical Telescopes + Instrumentation 2020, Virtual, 14-18 December 2020. Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. , vol.11453 SPIE, 114532C. 10.1117/12.2562045

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Abstract

The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 transition edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz in order to achieve the sensitivity necessary to measure or constrain numerous cosmological quantities, as outlined in The Simons Observatory Collaboration et al. (2019). To verify consistency of fabrication and performance in line with our sensitivity requirements, we will perform in-lab optical tests on isolated SO detectors as well as full detector arrays. The tests include beam measurements, bandpass measurements, and polarization measurements, among others. Here, we will describe the development of a cryogenic testbed that enables optical characterization of SO's detectors. We include the infrared filtering strategy to allow suitable cryogenic performance, design and implementation of the test equipment used in characterization, and the preliminary results from our validation of the testbed's cryo-optical performance....

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
Last Modified:	20 Apr 2023 13:15
URI:	https://orca.cardiff.ac.uk/id/eprint/156725

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