Open Access Paper
12 September 2023 BoloCalc: a sensitivity calculator for the design of Simons Observatory (Erratum)
Charles A. Hill, Sarah Marie Bruno, Sara M. Simon, Aamir Ali, Kam S. Arnold, Peter C. Ashton, Darcy Barron, Sean Bryan, Yuji Chinone, Gabriele Coppi, Kevin T. Crowley, Ari Cukierman, Simon Dicker, Jo Dunkley, Giulio Fabbian, Nicholas Galitzki, Patricio A. Gallardo, Jon E. Gudmundsson, Johannes Hubmayr, Brian Keating, Akito Kusaka, Adrian T. Lee, Frederick Matsuda, Philip D. Mauskopf, Jeffrey McMahon, Michael D. Niemack, Giuseppe Puglisi, Mayuri Sathyanarayana Rao, Maria Salatino, Carlos E. Sierra, Suzanne Staggs, Aritoki Suzuki, Grant Teply, Joel N. Ullom, Benjamin Westbrook, Zhilei Xu, Ningfeng Zhu
Author Affiliations +
Abstract
Publisher's Note: This paper, originally published on, 9 July 2018, was replaced with a corrected/revised version on,12 September 2023. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance.

2.2

Photon noise

Photon noise in bolometric detection is the result of fluctuations in the arrival times of photons at the absorbing element28,31,32

00001_PSISDG10708_107084C_page_1_1.jpg
00001_PSISDG10708_107084C_page_1_2.jpg

Equation 4b is a corrected version of Eq. 4a that was added via a 2023 erratum to the original 2018 publication.

There are two contributions to NEPph. The first term represents shot noise NEPshot, which dominates when the photon occupation number <<1 (e.g. optical wavelengths) and is 00001_PSISDG10708_107084C_page_1_3.jpg. The second term represents wave noise NEPwavc, which dominates when the photon occupation number is >> 1 (e.g. radio wavelengths) and is cc Popt. For ground-based experiments, the photon occupation number at ~ 100 GHz is ~ 1, and therefore a careful handling of both terms is necessary for an accurate NET estimate.

© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Charles A. Hill, Sarah Marie Bruno, Sara M. Simon, Aamir Ali, Kam S. Arnold, Peter C. Ashton, Darcy Barron, Sean Bryan, Yuji Chinone, Gabriele Coppi, Kevin T. Crowley, Ari Cukierman, Simon Dicker, Jo Dunkley, Giulio Fabbian, Nicholas Galitzki, Patricio A. Gallardo, Jon E. Gudmundsson, Johannes Hubmayr, Brian Keating, Akito Kusaka, Adrian T. Lee, Frederick Matsuda, Philip D. Mauskopf, Jeffrey McMahon, Michael D. Niemack, Giuseppe Puglisi, Mayuri Sathyanarayana Rao, Maria Salatino, Carlos E. Sierra, Suzanne Staggs, Aritoki Suzuki, Grant Teply, Joel N. Ullom, Benjamin Westbrook, Zhilei Xu, and Ningfeng Zhu "BoloCalc: a sensitivity calculator for the design of Simons Observatory (Erratum)", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107084C (12 September 2023); https://doi.org/10.1117/12.3010424
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KEYWORDS
Design and modelling

Observatories

Alternate lighting of surfaces

Astronomical telescopes

Astronomy

Cosmology

Radio astronomy

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