1. The optical design of the Litebird Medium and High Frequency Telescope
- Author
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Alessandro Paiella, Créidhe O'Sullivan, Reijo Keskitalo, Bruno Maffei, M. De Petris, P. de Bernardis, J. Austermann, L. Montier, S. Bounissou, Berend Winter, Peter Charles Hargrave, F. Columbro, Tomotake Matsumura, F. Noviello, Johannes Hubmayr, G. Jaehnig, S. Realini, Giampaolo Pisano, N. Trappe, Jon E. Gudmundsson, Sophie Henrot-Versille, A. Ritacco, Luca Lamagna, H. Imada, A. Suzuki, Silvia Masi, B. Mot, Cristian Franceschet, Giorgio Savini, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL), and Litebird Joint Study Group
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Computer science ,optics: design ,satellite ,Cosmic microwave background ,FOS: Physical sciences ,cosmic background radiation: polarization ,LiteBIRD ,model: optical ,02 engineering and technology ,LiteBIRD, Cosmic Microwave Background, polarization measurements, millimeter wavelengths,refractive telescopes, space telescopes, optical modeling ,Space telescopes ,01 natural sciences ,law.invention ,010309 optics ,Telescope ,law ,Cosmic Microwave Background ,0103 physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Aerospace engineering ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,activity report ,detector: design ,business.industry ,Gravitational wave ,gravitational radiation: primordial ,Astrophysics::Instrumentation and Methods for Astrophysics ,System optimization ,Refractive telescopes ,sensitivity ,021001 nanoscience & nanotechnology ,Polarization (waves) ,Optical modeling ,B-mode ,Polarization measurements ,Control system ,Millimeter wavelengths ,Astrophysics - Instrumentation and Methods for Astrophysics ,0210 nano-technology ,business ,performance ,Microwave ,Astrophysics - Cosmology and Nongalactic Astrophysics - 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., Comment: 17 pages, 13 figures, SPIE Proceeding no. 11443-283
- Published
- 2020