Optical analysis of BISOU: a balloon project to measure the CMB spectral distortions

N. Trappe; C. O'Sullivan; B. Maffei; N. Aghanim; M. Abitol; E. Battistelli; J. Chluba; X. Coulon; P. de Bernardis; C. Hill; A. Kogut; S. Masi; L. Pagano; A. Rotti; G. Savini; A. Tartari

doi:10.1117/12.2629286

31 August 2022 Optical analysis of BISOU: a balloon project to measure the CMB spectral distortions

N. Trappe, C. O'Sullivan, B. Maffei, N. Aghanim, M. Abitol, E. Battistelli, J. Chluba, X. Coulon, P. de Bernardis, C. Hill, A. Kogut, S. Masi, L. Pagano, A. Rotti, G. Savini, A. Tartari

Author Affiliations +

Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; 121901Q (2022) https://doi.org/10.1117/12.2629286
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

BISOU (Balloon Interferometer for Spectral Observations of the Universe) is a CNES phase zero study investigating the feasibility of observing spectral distortion in the CMB signal using a balloon-borne spectrometer, which also will act as a pathfinder for a future space mission dedicated to the measurements of the CMB spectral distortions. The CMB frequency spectrum is an important probe of the cosmological model. In this paper, we describe the optical layout and outline the initial optical analysis of the signal path and the reference beam path. The major challenge outlined is the inclusion of the required optical train in a confined volume of the cryostat. We include a multimoded description of the optical response of the system from the multimoded pyramidal horn through the optical path containing mirrors and wire grids and predict beam patterns on the sky.

Citation Download Citation

N. Trappe, C. O'Sullivan, B. Maffei, N. Aghanim, M. Abitol, E. Battistelli, J. Chluba, X. Coulon, P. de Bernardis, C. Hill, A. Kogut, S. Masi, L. Pagano, A. Rotti, G. Savini, and A. Tartari "Optical analysis of BISOU: a balloon project to measure the CMB spectral distortions", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121901Q (31 August 2022); https://doi.org/10.1117/12.2629286

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available