Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD

T. Hasebe , S. Kashima , P.A.R. Ade , Y. Akiba , D. Alonso , K. Arnold , J. Aumont (1) , C. Baccigalupi , D. Barron , S. Basak , S. Beckman , J. Borrill , F. Boulanger (1) , M. Bucher (2) , E. Calabrese , Y. Chinone , H.M. Cho , A. Cukierman , D.W. Curtis , T. Haan , M. Dobbs , A. Dominjon , T. Dotani , L. Duband (3) , A. Ducout , J. Dunkley , J.M. Duval (4) , T. Elleflot , H.K. Eriksen , J. Errard (2) , J. Fischer , T. Fujino , T. Funaki , U. Fuskeland , K. Ganga (2) , N. Goeckner-Wald , J. Grain (1) , N.W. Halverson , T. Hamada , M. Hasegawa , K. Hattori , M. Hattori , L. Hayes , M. Hazumi , N. Hidehira , C.A. Hill , G. Hilton , J. Hubmayr , K. Ichiki , T. Iida , H. Imada , M. Inoue , Y. Inoue , K.D. Irwin , H. Ishino , O. Jeong , H. Kanai , D. Kaneko , N. Katayama , T. Kawasaki , S.A. Kernasovskiy , R. Keskitalo , A. Kibayashi , Y. Kida , K. Kimura , T. Kisner , K. Kohri , E. Komatsu , K. Komatsu , C.L. Kuo , N.A. Kurinsky , A. Kusaka , A. Lazarian , A.T. Lee , D. Li , E. Linder , B. Maffei (1) , A. Mangilli (1) , M. Maki , T. Matsumura , S. Matsuura , D. Meilhan , S. Mima , Y. Minami , K. Mitsuda , L. Montier (5) , M. Nagai , T. Nagasaki , R. Nagata , M. Nakajima , S. Nakamura , T. Namikawa , M. Naruse , H. Nishino , T. Nitta , T. Noguchi , H. Ogawa , S. Oguri , N. Okada , A. Okamoto , T. Okamura , C. Otani , G. Patanchon (2) , G. Pisano , G. Rebeiz , M. Remazeilles , P.L. Richards , S. Sakai , Y. Sakurai , Y. Sato , N. Sato , M. Sawada , Y. Segawa , Y. Sekimoto , U. Seljak , B.D. Sherwin , T. Shimizu , K. Shinozaki , R. Stompor (2) , H. Sugai , H. Sugita , A. Suzuki , J. Suzuki , O. Tajima , S. Takada , R. Takaku , S. Takakura , S. Takatori , D. Tanabe , E. Taylor , K.L. Thompson , B. Thorne , T. Tomaru , T. Tomida , N. Tomita , M. Tristram (6) , C. Tucker , P. Turin , M. Tsujimoto , S. Uozumi , S. Utsunomiya , Y. Uzawa , F. Vansyngel (1) , I.K. Wehus , B. Westbrook , M. Willer , N. Whitehorn , Y. Yamada , R. Yamamoto , N. Yamasaki , T. Yamashita , M. Yoshida

1 IAS - Institut d'astrophysique spatiale
2 APC (UMR_7164) - AstroParticule et Cosmologie
3 SBT - Service des Basses Températures
4 LCCS - Laboratoire des Cryoréfrigérateurs et Cryogénie Spatiale
5 IRAP - Institut de recherche en astrophysique et planétologie
6 LAL - Laboratoire de l'Accélérateur Linéaire

The high-frequency telescope for LiteBIRD is designed with refractive and reflective optics. In order to improve sensitivity, this paper suggests the new optical configurations of the HFT which have approximately 7 times larger focal planes than that of the original design. The sensitivities of both the designs are compared, and the requirement of anti-reflection (AR) coating on the lens for the refractive option is derived. We also present the simulation result of a sub-wavelength AR structure on both surfaces of silicon, which shows a band-averaged reflection of 1.1–3.2% at 101–448 GHz.

Mots clés: Cosmic microwave background radiation; Inflation; Satellite; Telescope

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Astrophysique [astro-ph]

T. Hasebe, S. Kashima, P.A.R. Ade, Y. Akiba, D. Alonso, et al.. Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD. 17th International Workshop on Low Temperature Detectors, Jul 2017, Kurume, Japan. pp.841-850, ⟨10.1007/s10909-018-1915-2⟩. ⟨hal-01960287⟩