Development of an optical detector testbed for the Simons Observatory

Joseph Seibert; Peter Ade; Aamir M. Ali; Kam Arnold; Nicholas F. Cothard; Nicholas Galitzki; Kathleen Harrington; Shuay-Pwu Patty Ho; Brian Keating; Lindsay Ng. Lowry; Megan Russell; Maximiliano Silva-Feaver; Praween Siritanasak; Grant P. Teply; Carole Tucker; Eve M. Vavagiakis; Zhilei Xu

doi:10.1117/12.2562045

15 December 2020 Development of an optical detector testbed for the Simons Observatory

Joseph Seibert, Peter Ade, Aamir M. Ali, Kam Arnold, Nicholas F. Cothard, Nicholas Galitzki, Kathleen Harrington, Shuay-Pwu Patty Ho, Brian Keating, Lindsay Ng. Lowry, Megan Russell, Maximiliano Silva-Feaver, Praween Siritanasak, Grant P. Teply, Carole Tucker, Eve M. Vavagiakis, Zhilei Xu

Author Affiliations +

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114532C (2020) https://doi.org/10.1117/12.2562045
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

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.

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Joseph Seibert, Peter Ade, Aamir M. Ali, Kam Arnold, Nicholas F. Cothard, Nicholas Galitzki, Kathleen Harrington, Shuay-Pwu Patty Ho, Brian Keating, Lindsay Ng. Lowry, Megan Russell, Maximiliano Silva-Feaver, Praween Siritanasak, Grant P. Teply, Carole Tucker, Eve M. Vavagiakis, and Zhilei Xu "Development of an optical detector testbed for the Simons Observatory", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114532C (15 December 2020); https://doi.org/10.1117/12.2562045

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