Journal Article

LiteBIRD: A Satellite for the Studies of B-Mode Polarization and Inflation from Cosmic Background Radiation Detection

Otani, C., Matsuura, S., Jeong, O., Boulanger, F., Dobbs, M., Hattori, M., Richards, P. L., Hasebe, T., Lazarian, A., Fujino, T., Nitta, T., Kida, Y., Arnold, K., Komatsu, K., Maffei, B., Aumont, J., Nakamura, S., Sherwin, B. D., Turin, P., Sawada, M., Stompor, R., Yamamoto, R., Kusaka, A., Mangilli, A., Inoue, Y., Takaku, R., Yoshida, M., Hayes, L., Kawasaki, T., Tomida, T., Westbrook, B., Tsujimoto, M., Seljak, U., Yamashita, T., Curtis, D. W., Nagata, R., Basak, S., Ganga, K., Keskitalo, R., Pisano, G., Kimura, K., Tomaru, T., Sato, Y., Hidehira, N., Minami, Y., Takakura, S., Cukierman, A., Nagai, M., Thompson, K. L., Funaki, T., Tanabe, D., Kohri, K., Tomita, N., Okamura, T., Hattori, K., Sakurai, Y., Suzuki, A., Tajima, O., Tristram, M., Willer, M., Sugita, H., Ichiki, K., Vansyngel, F., Noguchi, T., Eriksen, H. K., Ishino, H., Hazumi, M., Suzuki, J., Errard, J., Kernasovskiy, S. A., Dotani, T., Patanchon, G., Thorne, B., Mima, S., Matsumura, T., Maki, M., Dominjon, A., Ducout, A., Uozumi, S., Oguri, S., Li, D., Takada, S., Yamada, Y., de Haan, T., Imada, H., Calabrese, E., Goeckner-Wald, N., Okamoto, A., Nishino, H., Nakajima, M., Yamasaki, N., Montier, L., Ka

2019

Overview

LiteBIRD is a candidate satellite for a strategic large mission of JAXA. With its expected launch in the middle of the 2020s with a H3 rocket, LiteBIRD plans to map the polarization of the cosmic microwave background radiation over the full sky with unprecedented precision. The full success of LiteBIRD is to achieve δ r < 0.001 , where δ r is the total error on the tensor-to-scalar ratio r . The required angular coverage corresponds to 2 ≤ ℓ ≤ 200 , where ℓ is the multipole moment. This allows us to test well-motivated cosmic inflation models. Full-sky surveys for 3 years at a Lagrangian point L2 will be carried out for 15 frequency bands between 34 and 448 GHz with two telescopes to achieve the total sensitivity of 2.5 μ K arcmin with a typical angular resolution of 0.5 ∘ at 150 GHz. Each telescope is equipped with a half-wave plate system for polarization signal modulation and a focal plane filled with polarization-sensitive TES bolometers. A cryogenic system provides a 100 mK base temperature for the focal planes and 2 K and 5 K stages for optical components.

• Publisher: Springer US,Springer Nature B.V,Springer Verlag (Germany),Springer
• Subject: Angular resolution / Astrophysics / B-mode polarization / Background radiation / Big Bang theory / Bolometers / Characterization and Evaluation of Materials / Condensed Matter Physics / Cosmic inflation / Cosmic microwave background / Cryogenic equipment / Focal plane / Frequencies / Gravitational waves / Gravity / Instrumentation and Detectors / Lagrangian equilibrium points / Low temperature physics / Magnetic Materials / Magnetism / Multipoles / Optical components / Physics / Physics and Astronomy / Polarization / Primordial gravitational wave / Quantum gravity / Satellite / Satellites / Sky surveys (astronomy) / Spacecraft components / Telescopes / Tensors / Wave plates