Portal de Periódicos da CAPES

LiteBIRD: mission overview and design tradeoffs

2014; SPIE; Volume: 9143; Linguagem: Inglês

10.1117/12.2055794

1996-756X

T. Matsumura, Y. Akiba, J. Borrill, Y. Chinone, M. Dobbs, H. Fuke, M. Hasegawa, K. Hattori, M. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori, Junji Inatani, M. Inoue, Yuki Inoue, K. Ishidoshiro, H. Ishino, H. Ishitsuka, K. Karatsu, Shingo Kashima, N. Katayama, Isao Kawano, A. Kibayashi, Y. Kibe, Kouji Kimura, N. Kimura, Eiichiro Komatsu, M. Kozu, K. Koga, A. Lee, Hideo Matsuhara, S. Mima, Kazuhisa Mitsuda, K. Mizukami, H. Morii, Takahiro Morishima, M. Nagai, Ryo Nagata, Shogo Nakamura, Mitsuhide Naruse, Toshiya Namikawa, K. Natsume, Toshiyuki Nishibori, Kunitoshi Nishijo, H. Nishino, Atsushi Noda, Takashi Noguchi, Hideaki Ogawa, S. Oguri, I. Ohta, N. Okada, Chiko Otani, P. L. Richards, Shin-ichiro Sakai, N. Sato, Yoichi Sato, Y. Segawa, Yutaro Sekímoto, Keisuke Shinozaki, Hiroyuki Sugita, Aritoki Suzuki, T. Suzuki, O. Tajima, S. Takada, S. Takakura, Yoh Takei, T. Tomaru, Yoshinori Uzawa, Takehiko Wada, Hiroki Watanabe, Y. Yamada, Hiroya Yamaguchi, Noriko Y. Yamasaki, M. Yoshida, T. Yoshida, Kazuhiko Yotsumoto,

Particle Detector Development and Performance

We present the mission design of LiteBIRD, a next generation satellite for the study of B-mode polarization and inflation from cosmic microwave background radiation (CMB) detection. The science goal of LiteBIRD is to measure the CMB polarization with the sensitivity of δr = 0:001, and this allows testing the major single-field slow-roll inflation models experimentally. The LiteBIRD instrumental design is purely driven to achieve this goal. At the earlier stage of the mission design, several key instrumental specifications, e.g. observing band, optical system, scan strategy, and orbit, need to be defined in order to process the rest of the detailed design. We have gone through the feasibility studies for these items in order to understand the tradeoffs between the requirements from the science goal and the compatibilities with a satellite bus system. We describe the overview of LiteBIRD and discuss the tradeoffs among the choices of scientific instrumental specifications and strategies. The first round of feasibility studies will be completed by the end of year 2014 to be ready for the mission definition review and the target launch date is in early 2020s.