CERN Accelerating science

Article
Report number	arXiv:2001.01724
Title	Updated design of the CMB polarization experiment satellite LiteBIRD
Author(s)	Sugai, H. (Tokyo U., IPMU) ; Ade, P.A.R. (Cardiff U.) ; Akiba, Y. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Alonso, D. (Oxford U.) ; Arnold, K. (UC, San Diego) ; Aumont, J. (IRAP, Toulouse) ; Austermann, J. (NIST, Boulder) ; Baccigalupi, C. (CNR, Italy ; INFN, Trieste ; SISSA, Trieste) ; Banday, A.J. (IRAP, Toulouse) ; Banerji, R. (Oslo U.) ; Barreiro, R.B. (Cantabria Inst. of Phys.) ; Basak, S. (IISER, Trivandrum ; SISSA, Trieste) ; Beall, J. (NIST, Boulder) ; Beckman, S. (UC, Berkeley) ; Bersanelli, M. (INFN, Milan ; Milan U.) ; Borrill, J. (LBNL, Berkeley ; UC, Berkeley) ; Boulanger, F. (Orsay, IAS) ; Brown, M.L. (Manchester U.) ; Bucher, M. (APC, Paris) ; Buzzelli, A. (Rome U., Tor Vergata) ; Calabrese, E. (Cardiff U.) ; Casas, F.J. (Cantabria Inst. of Phys.) ; Challinor, A. (Cambridge U., KICC ; Cambridge U.) ; Chan, V. (Toronto U.) ; Chinone, Y. (Tokyo U., IPMU ; UC, Berkeley) ; Cliche, J.‑F. (McGill U.) ; Columbro, F. (INFN, Rome ; Rome U.) ; Cukierman, A. (UC, Berkeley) ; Curtis, D. (UC, Berkeley) ; Danto, P. (CNES, Paris) ; de Bernardis, P. (INFN, Rome ; Rome U.) ; de Haan, T. (LBNL, Berkeley) ; De Petris, M. (INFN, Rome ; Rome U.) ; Dickinson, C. (Manchester U.) ; Dobbs, M. (McGill U.) ; Dotani, T. (JAXA, Sagamihara) ; Duband, L. (CEA-DTA-LETI, Grenoble) ; Ducout, A. (Tokyo U., IPMU) ; Duf, S. (NIST, Boulder) ; Duivenvoorden, A. (Stockholm U.) ; Duval, J.‑M. (CEA-DTA-LETI, Grenoble) ; Ebisawa, K. (JAXA, Sagamihara) ; Ellefot, T. (UC, San Diego) ; Enokida, H. (Tokyo U.) ; Eriksen, H.K. (Oslo U.) ; Errard, J. (APC, Paris) ; Essinger‑Hileman, T. (NASA, Goddard) ; Finelli, F. (INAF-IRA, Bologna) ; Flauger, R. (UC, San Diego) ; Franceschet, C. (INFN, Milan ; Milan U.) ; Fuskeland, U. (Oslo U.) ; Ganga, K. (APC, Paris) ; Gao, J.‑R. (SRON, Utrecht) ; Génova‑Santos, R. (IAC, La Laguna ; Laguna U., Tenerife) ; Ghigna, T. (Tokyo U., IPMU ; Oxford U.) ; Gomez, A. (CNES, Paris) ; Gradziel, M.L. (NUIM, Maynooth) ; Grain, J. (Orsay, IAS) ; Grupp, F. (Garching, Max Planck Inst., MPE ; Munich U. Observ.) ; Gruppuso, A. (INAF-IRA, Bologna) ; Gudmundsson, J.E. (Stockholm U.) ; Halverson, N.W. (Colorado U.) ; Hargrave, P. (Cardiff U.) ; Hasebe, T. (JAXA, Sagamihara) ; Hasegawa, M. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Hattori, M. (Tohoku U.) ; Hazumi, M. (JAXA, Sagamihara ; Tokyo U., IPMU ; KEK, Tsukuba ; Sokendai, Tsukuba) ; Henrot‑Versille, S. (Orsay, LAL) ; Herranz, D. (Cantabria Inst. of Phys.) ; Hill, C. (LBNL, Berkeley ; UC, Berkeley) ; Hilton, G. (NIST, Boulder) ; Hirota, Y. (Tokyo U.) ; Hivon, E. (Paris, Inst. Astrophys.) ; Hlozek, R. (Toronto U.) ; Hoang, D.‑T. (Cornell U. ; Unlisted, VN) ; Hubmayr, J. (NIST, Boulder) ; Ichiki, K. (Nagoya U.) ; Iida, T. (Tokyo U., IPMU) ; Imada, H. (Orsay, LAL) ; Ishimura, K. (Waseda U.) ; Ishino, H. (KEK, Tsukuba ; Okayama U.) ; Jaehnig, G.C. (Colorado U.) ; Jones, M. (Oxford U.) ; Kaga, T. (JAXA, Sagamihara) ; Kashima, S. (Natl. Astron. Observ. of Japan) ; Kataoka, Y. (Okayama U.) ; Katayama, N. (Tokyo U., IPMU) ; Kawasaki, T. (Kitasato U.) ; Keskitalo, R. (LBNL, Berkeley) ; Kibayashi, A. (Okayama U.) ; Kikuchi, T. (AIST, Tsukuba) ; Kimura, K. (Osaka U.) ; Kisner, T. (LBNL, Berkeley) ; Kobayashi, Y. (Tokyo U., ISSP) ; Kogiso, N. (Osaka U.) ; Kogut, A. (NASA, Goddard) ; Kohri, K. (KEK, Tsukuba) ; Komatsu, E. (Garching, Max Planck Inst.) ; Komatsu, K. (Okayama U.) ; Konishi, K. (Maryland U. ; Nordita ; Royal Inst. Tech., Stockholm) ; Krachmalnicof, N. (CNR, Italy ; INFN, Trieste ; SISSA, Trieste) ; Kuo, C.L. (KIPAC, Menlo Park ; SLAC) ; Kurinsky, N. (KIPAC, Menlo Park ; SLAC) ; Kushino, A. (Tsukuba U.) ; Kuwata‑Gonokami, M. (Tokyo U.) ; Lamagna, L. (INFN, Rome ; Rome U.) ; Lattanzi, M. (INFN, Ferrara) ; Lee, A.T. (LBNL, Berkeley ; UC, Berkeley) ; Linder, E. (LBNL, Berkeley ; UC, Berkeley) ; Mafei, B. (Orsay, IAS) ; Maino, D. (INFN, Milan ; Milan U.) ; Maki, M. (KEK, Tsukuba) ; Mangilli, A. (IRAP, Toulouse) ; Martínez‑González, E. (Cantabria Inst. of Phys.) ; Masi, S. (INFN, Rome ; Rome U.) ; Mathon, R. (IRAP, Toulouse) ; Matsumura, T. (Tokyo U., IPMU) ; Mennella, A. (INFN, Milan ; Milan U.) ; Migliaccio, M. (INFN, Rome ; Rome U., Tor Vergata) ; Minami, Y. (KEK, Tsukuba) ; Mistuda, K. (JAXA, Sagamihara) ; Molinari, D. (Ferrara U.) ; Montier, L. (IRAP, Toulouse) ; Morgante, G. (INAF-IRA, Bologna) ; Mot, B. (IRAP, Toulouse) ; Murata, Y. (JAXA, Sagamihara) ; Murphy, J.A. (NUIM, Maynooth) ; Nagai, M. (Natl. Astron. Observ. of Japan) ; Nagata, R. (KEK, Tsukuba) ; Nakamura, S. (Yokohama Natl. U.) ; Namikawa, T. (Cambridge U.) ; Natoli, P. (INFN, Ferrara ; Ferrara U.) ; Nerval, S. (Toronto U.) ; Nishibori, T. (JAXA, Tsukuba) ; Nishino, H. (Tokyo U., RESCEU) ; Nomura, Y. (Saitama U.) ; Noviello, F. (Cardiff U.) ; O'Sullivan, C. (NUIM, Maynooth) ; Ochi, H. (Yokohama Natl. U.) ; Ogawa, H. (Osaka U.) ; Ogawa, H. (JAXA, Sagamihara) ; Ohsaki, H. (Tokyo U.) ; Ohta, I. (Konan U.) ; Okada, N. (JAXA, Sagamihara) ; Okada, N. (Osaka U.) ; Pagano, L. (INFN, Ferrara ; Ferrara U.) ; Paiella, A. (INFN, Rome ; Rome U.) ; Paoletti, D. (INAF-IRA, Bologna) ; Patanchon, G. (APC, Paris) ; Piacentini, F. (INFN, Rome ; Rome U.) ; Pisano, G. (Cardiff U.) ; Polenta, G. (ASI, Rome) ; Poletti, D. (CNR, Italy ; INFN, Trieste ; SISSA, Trieste) ; Prouvé, T. (CEA-DTA-LETI, Grenoble) ; Puglisi, G. (SLAC) ; Rambaud, D. (IRAP, Toulouse) ; Raum, C. (UC, Berkeley) ; Realini, S. (INFN, Milan ; Milan U.) ; Remazeilles, M. (Manchester U.) ; Roudil, G. (IRAP, Toulouse) ; Rubiño‑Martín, J.A. (IAC, La Laguna ; Laguna U., Tenerife) ; Russell, M. (UC, San Diego) ; Sakurai, H. (Tokyo U.) ; Sakurai, Y. (Tokyo U., IPMU) ; Sandri, M. (INAF-IRA, Bologna) ; Savini, G. (University Coll. London) ; Scott, D. (British Columbia U.) ; Sekimoto, Y. (JAXA, Sagamihara ; KEK, Tsukuba ; Sokendai, Tsukuba) ; Sherwin, B.D. (Cambridge U., KICC ; Cambridge U.) ; Shinozaki, K. (JAXA, Tsukuba) ; Shiraishi, M. (Kagawa U.) ; Shirron, P. (NASA, Goddard) ; Signorelli, G. (INFN, Pisa) ; Smecher, G. (Victoria U.) ; Spizzi, P. (CNES, Paris) ; Stever, S.L. (Tokyo U., IPMU) ; Stompor, R. (APC, Paris) ; Sugiyama, S. (Saitama U.) ; Suzuki, A. (LBNL, Berkeley) ; Suzuki, J. (KEK, Tsukuba) ; Switzer, E. (NASA, Goddard) ; Takaku, R. (Tokyo U.) ; Takakura, H. (Tokyo U.) ; Takakura, S. (Tokyo U., IPMU) ; Takeda, Y. (JAXA, Sagamihara) ; Taylor, A. (Oxford U.) ; Taylor, E. (UC, Berkeley) ; Terao, Y. (Tokyo U.) ; Thompson, K.L. (KIPAC, Menlo Park ; SLAC) ; Thorne, B. (Oxford U.) ; Tomasi, M. (INFN, Milan ; Milan U.) ; Tomida, H. (JAXA, Sagamihara) ; Trappe, N. (NUIM, Maynooth) ; Tristram, M. (Orsay, LAL) ; Tsuji, M. (Kagawa U.) ; Tsujimoto, M. (JAXA, Sagamihara) ; Tucker, C. (Cardiff U.) ; Ullom, J. (NIST, Boulder) ; Uozumi, S. (Okayama U.) ; Utsunomiya, S. (Tokyo U., IPMU) ; Van Lanen, J. (NIST, Boulder) ; Vermeulen, G. (Neel Lab, Grenoble) ; Vielva, P. (Cantabria Inst. of Phys.) ; Villa, F. (INAF-IRA, Bologna) ; Vissers, M. (NIST, Boulder) ; Vittorio, N. (Rome U., Tor Vergata) ; Voisin, F. (APC, Paris) ; Walker, I. (Cardiff U.) ; Watanabe, N. (Kitasato U.) ; Wehus, I. (Oslo U.) ; Weller, J. (Garching, Max Planck Inst., MPE ; Munich U. Observ.) ; Westbrook, B. (UC, Berkeley) ; Winter, B. (University Coll. London) ; Wollack, E. (NASA, Goddard) ; Yamamoto, R. (AIST, Tsukuba) ; Yamasaki, N.Y. (JAXA, Sagamihara) ; Yanagisawa, M. (Okayama U.) ; Yoshida, T. (JAXA, Sagamihara) ; Yumoto, J. (Tokyo U.) ; Zannoni, M. (INFN, Milan ; Milan Bicocca U.) ; Zonca, A. (UC, San Diego)
Publication	2020-01-27
Imprint	2020-01-06
Number of pages	11
In:	J. Low Temp. Phys. 199 (2020) 1107-1117
DOI	10.1007/s10909-019-02329-w (publication)
Subject category	astro-ph.IM ; Astrophysics and Astronomy
Abstract	Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite CMB polarization experiments. LiteBIRD is in the most advanced phase among such future satellites, targeting its launch in Japanese Fiscal Year 2027 (2027FY) with JAXA's H3 rocket. It will accommodate more than 4000 TESs in focal planes of reflective low-frequency and refractive medium-and-high-frequency telescopes in order to detect a signature imprinted on the cosmic microwave background (CMB) by the primordial gravitational waves predicted in cosmic inflation. The total wide frequency coverage between 34GHz and 448GHz enables us to extract such weak spiral polarization patterns through the precise subtraction of our Galaxy's foreground emission by using spectral differences among CMB and foreground signals. Telescopes are cooled down to 5Kelvin for suppressing thermal noise and contain polarization modulators with transmissive half-wave plates at individual apertures for separating sky polarization signals from artificial polarization and for mitigating from instrumental 1/f noise. Passive cooling by using V-grooves supports active cooling with mechanical coolers as well as adiabatic demagnetization refrigerators. Sky observations from the second Sun-Earth Lagrangian point, L2, are planned for three years. An international collaboration between Japan, USA, Canada, and Europe is sharing various roles. In May 2019, the Institute of Space and Astronautical Science (ISAS), JAXA selected LiteBIRD as the strategic large mission No. 2.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © The Author(s) 2020 (License: CC-BY-4.0)

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