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The optical design of the Litebird middle and high frequency telescope

Lamagna, L; Gudmundsson, JE; Imada, H; Hargrave, P; Franceschet, C; De Petris, M; Austermann, J; ... Winter, B; + view all (2020) The optical design of the Litebird middle and high frequency telescope. In: Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave. SPIE: Online conference. Green open access

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Abstract

LiteBIRD is a JAXA strategic L-class mission devoted to the measurement of polarization of the Cosmic Microwave Background, searching for the signature of primordial gravitational waves in the B-modes pattern of the polarization. The onboard instrumentation includes a Middle and High Frequency Telescope (MHFT), based on a pair of cryogenically cooled refractive telescopes covering, respectively, the 89-224 GHz and the 166-448 GHz bands. Given the high target sensitivity and the careful systematics control needed to achieve the scientific goals of the mission, optical modeling and characterization are performed with the aim to capture most of the physical effects potentially affecting the real performance of the two refractors. We describe the main features of the MHFT, its design drivers and the major challenges in system optimization and characterization. We provide the current status of the development of the optical system and we describe the current plan of activities related to optical performance simulation and validation.

Type: Proceedings paper
Title: The optical design of the Litebird middle and high frequency telescope
Event: SPIE Astronomical Telescopes + Instrumentation, 2020
ISBN-13: 9781510636736
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2579233
Publisher version: https://doi.org/10.1117/12.2579233
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Telescopes, Optical design, Polarization, Refractor telescopes, Control systems, Device simulation, Microwave radiation, Optical simulations, Performance modeling
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10121617
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