Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

Y. Sekimoto; P. A.R. Ade; A. Adler; E. Allys; K. Arnold; D. Auguste; J. Aumont; R. Aurlien; J. Austermann; C. Baccigalupi; A. J. Banday; R. Banerji; R. B. Barreiro; S. Basak; J. Beall; D. Beck; S. Beckman; J. Bermejo; P. De Bernardis; M. Bersanelli; J. Bonis; J. Borrill; F. Boulanger; S. Bounissou; M. Brilenkov; M. Brown; M. Bucher; E. Calabrese; P. Campeti; A. Carones; F. J. Casas; A. Challinor; V. Chan; K. Cheung; Y. Chinone; J. F. Cliche; L. Colombo; F. Columbro; J. Cubas; A. Cukierman; D. Curtis; G. D'Alessandro; N. Dachlythra; M. De Petris; C. Dickinson; P. Diego-Palazuelos; M. Dobbs; T. Dotani; L. Duband; S. Duff; J. M. Duval; K. Ebisawa; T. Elleflot; H. K. Eriksen; J. Errard; T. Essinger-Hileman; F. Finelli; R. Flauger; C. Franceschet; U. Fuskeland; M. Galloway; K. Ganga; J. R. Gao; R. Genova-Santos; M. Gerbino; M. Gervasi; T. Ghigna; E. Gjerløw; M. L. Gradziel; J. Grain; F. Grupp; A. Gruppuso; J. E. Gudmundsson; T. De Haan; N. W. Halverson; P. Hargrave; T. Hasebe; M. Hasegawa; M. Hattori; M. Hazumi; S. Henrot-Versille; D. Herman; D. Herranz; C. A. Hill; G. Hilton; Y. Hirota; E. Hivon; R. A. Hlozek; Y. Hoshino; E. De La Hoz; J. Hubmayr; K. Ichiki; T. Iida; H. Imada; K. Ishimura; H. Ishino; G. Jaehnig; T. Kaga; S. Kashima; N. Katayama; A. Kato; T. Kawasaki; R. Keskitalo; T. Kisner; Y. Kobayashi; N. Kogiso; A. Kogut; K. Kohri; E. Komatsu; K. Komatsu; K. Konishi; N. Krachmalnicoff; I. Kreykenbohm; C. L. Kuo; A. Kushino; L. Lamagna; J. V. Lanen; M. Lattanzi; A. T. Lee; C. Leloup; F. Levrier; E. Linder; T. Louis; G. Luzzi; T. MacIaszek; B. Maffei; D. Maino; M. Maki; S. Mandelli; E. Martinez-Gonzalez; S. Masi; T. Matsumura; A. Mennella; M. Migliaccio; Y. Minami; K. Mitsuda; J. Montgomery; L. Montier; G. Morgante; B. Mot; Y. Murata; J. A. Murphy; M. Nagai; Y. Nagano; T. Nagasaki; R. Nagata; S. Nakamura; T. Namikawa; P. Natoli; S. Nerval; T. Nishibori; H. Nishino; C. O Sullivan; H. Ogawa; H. Ogawa; S. Oguri; H. Ohsaki; I. S. Ohta; N. Okada; N. Okada; L. Pagano; A. Paiella; D. Paoletti; G. Patanchon; J. Peloton; F. Piacentini; G. Pisano; G. Polenta; D. Poletti; T. Prouve; G. Puglisi; D. Rambaud; C. Raum; S. Realini; M. Reinecke; M. Remazeilles; A. Ritacco; G. Roudil; J. A. Rubino-Martin; M. Russell; H. Sakurai; Y. Sakurai; M. Sandri; M. Sasaki; G. Savini; D. Scott; J. Seibert; B. Sherwin; K. Shinozaki; M. Shiraishi; P. Shirron; G. Signorelli; G. Smecher; S. Stever; R. Stompor; H. Sugai; S. Sugiyama; A. Suzuki; J. Suzuki; T. L. Svalheim; E. Switzer; R. Takaku; H. Takakura; S. Takakura; Y. Takase; Y. Takeda; A. Tartari; E. Taylor; Y. Terao; H. Thommesen; K. L. Thompson; B. Thorne; T. Toda; M. Tomasi; M. Tominaga; N. Trappe; M. Tristram; M. Tsuji; M. Tsujimoto; C. Tucker; J. Ullom; G. Vermeulen; P. Vielva; F. Villa; M. Vissers; N. Vittorio; I. Wehus; J. Weller; B. Westbrook; J. Wilms; B. Winter; E. J. Wollack; N. Y. Yamasaki; T. Yoshida; J. Yumoto; M. Zannoni; A. Zonca

doi:10.1117/12.2561841

Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

Y. Sekimoto, P. A.R. Ade, A. Adler, E. Allys, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, C. Baccigalupi, A. J. Banday, R. Banerji, R. B. Barreiro, S. Basak, J. Beall, D. Beck, S. Beckman, J. Bermejo, P. De Bernardis, M. BersanelliJ. Bonis, J. Borrill, F. Boulanger, S. Bounissou, M. Brilenkov, M. Brown, M. Bucher, E. Calabrese, P. Campeti, A. Carones, F. J. Casas, A. Challinor, V. Chan, K. Cheung, Y. Chinone, J. F. Cliche, L. Colombo, F. Columbro, J. Cubas, A. Cukierman, D. Curtis, G. D'Alessandro, N. Dachlythra, M. De Petris, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, L. Duband, S. Duff, J. M. Duval, K. Ebisawa, T. Elleflot, H. K. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, M. Galloway, K. Ganga, J. R. Gao, R. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, E. Gjerløw, M. L. Gradziel, J. Grain, F. Grupp, A. Gruppuso, J. E. Gudmundsson, T. De Haan, N. W. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versille, D. Herman, D. Herranz, C. A. Hill, G. Hilton, Y. Hirota, E. Hivon, R. A. Hlozek, Y. Hoshino, E. De La Hoz, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. L. Kuo, A. Kushino, L. Lamagna, J. V. Lanen, M. Lattanzi, A. T. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, T. MacIaszek, B. Maffei, D. Maino, M. Maki, S. Mandelli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, J. Montgomery, L. Montier, G. Morgante, B. Mot, Y. Murata, J. A. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, C. O Sullivan, H. Ogawa, H. Ogawa, S. Oguri, H. Ohsaki, I. S. Ohta, N. Okada, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, J. Peloton, F. Piacentini, G. Pisano, G. Polenta, D. Poletti, T. Prouve, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. A. Rubino-Martin, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, G. Savini, D. Scott, J. Seibert, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, S. Stever, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, T. L. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, E. Taylor, Y. Terao, H. Thommesen, K. L. Thompson, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, J. Ullom, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, I. Wehus, J. Weller, B. Westbrook, J. Wilms, B. Winter, E. J. Wollack, N. Y. Yamasaki, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Citations (Scopus)

Abstract

LiteBIRD has been selected as JAXA's strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the wide field-of-view (FoV) and broadband capabilities of millimeter-wave polarization measurements, which are derived from the system requirements. The possible paths of stray light increase with a wider FoV and the far sidelobe knowledge of-56 dB is a challenging optical requirement. A crossed-Dragone configuration was chosen for the low frequency telescope (LFT: 34-161 GHz), one of LiteBIRD's onboard telescopes. It has a wide field-of-view (18° x 9°) with an aperture of 400 mm in diameter, corresponding to an angular resolution of about 30 arcminutes around 100 GHz. The focal ratio f/3.0 and the crossing angle of the optical axes of 90a-▪ are chosen after an extensive study of the stray light. The primary and secondary reflectors have rectangular shapes with serrations to reduce the diffraction pattern from the edges of the mirrors. The reflectors and structure are made of aluminum to proportionally contract from warm down to the operating temperature at 5 K. A 1/4 scaled model of the LFT has been developed to validate the wide field-of-view design and to demonstrate the reduced far sidelobes. A polarization modulation unit (PMU), realized with a half-wave plate (HWP) is placed in front of the aperture stop, the entrance pupil of this system. A large focal plane with approximately 1000 AlMn TES detectors and frequency multiplexing SQUID amplifiers is cooled to 100 mK. The lens and sinuous antennas have broadband capability. Performance specifications of the LFT and an outline of the proposed verification plan are presented.

Original language	English
Title of host publication	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X
Editors	Jonas Zmuidzinas, Jian-Rong Gao
Publisher	SPIE
ISBN (Electronic)	9781510636934
DOIs	https://doi.org/10.1117/12.2561841
Publication status	Published - 2020
Event	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020 - Virtual, Online, United States Duration: Dec 14 2020 → Dec 22 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11453
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020
Country/Territory	United States
City	Virtual, Online
Period	12/14/20 → 12/22/20

Keywords

Cosmic microwave background
cryogenic telescope
millimeter-wave polarization
space program

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2561841

Cite this

Sekimoto, Y., Ade, P. A. R., Adler, A., Allys, E., Arnold, K., Auguste, D., Aumont, J., Aurlien, R., Austermann, J., Baccigalupi, C., Banday, A. J., Banerji, R., Barreiro, R. B., Basak, S., Beall, J., Beck, D., Beckman, S., Bermejo, J., De Bernardis, P., ... Zonca, A. (2020). Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD. In J. Zmuidzinas, & J-R. Gao (Eds.), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [1145310] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11453). SPIE. https://doi.org/10.1117/12.2561841

Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD. / Sekimoto, Y.; Ade, P. A.R.; Adler, A. et al.

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. ed. / Jonas Zmuidzinas; Jian-Rong Gao. SPIE, 2020. 1145310 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11453).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Sekimoto, Y, Ade, PAR, Adler, A, Allys, E, Arnold, K, Auguste, D, Aumont, J, Aurlien, R, Austermann, J, Baccigalupi, C, Banday, AJ, Banerji, R, Barreiro, RB, Basak, S, Beall, J, Beck, D, Beckman, S, Bermejo, J, De Bernardis, P, Bersanelli, M, Bonis, J, Borrill, J, Boulanger, F, Bounissou, S, Brilenkov, M, Brown, M, Bucher, M, Calabrese, E, Campeti, P, Carones, A, Casas, FJ, Challinor, A, Chan, V, Cheung, K, Chinone, Y, Cliche, JF, Colombo, L, Columbro, F, Cubas, J, Cukierman, A, Curtis, D, D'Alessandro, G, Dachlythra, N, De Petris, M, Dickinson, C, Diego-Palazuelos, P, Dobbs, M, Dotani, T, Duband, L, Duff, S, Duval, JM, Ebisawa, K, Elleflot, T, Eriksen, HK, Errard, J, Essinger-Hileman, T, Finelli, F, Flauger, R, Franceschet, C, Fuskeland, U, Galloway, M, Ganga, K, Gao, JR, Genova-Santos, R, Gerbino, M, Gervasi, M, Ghigna, T, Gjerløw, E, Gradziel, ML, Grain, J, Grupp, F, Gruppuso, A, Gudmundsson, JE, De Haan, T, Halverson, NW, Hargrave, P, Hasebe, T, Hasegawa, M, Hattori, M, Hazumi, M, Henrot-Versille, S, Herman, D, Herranz, D, Hill, CA, Hilton, G, Hirota, Y, Hivon, E, Hlozek, RA, Hoshino, Y, De La Hoz, E, Hubmayr, J, Ichiki, K, Iida, T, Imada, H, Ishimura, K, Ishino, H, Jaehnig, G, Kaga, T, Kashima, S, Katayama, N, Kato, A, Kawasaki, T, Keskitalo, R, Kisner, T, Kobayashi, Y, Kogiso, N, Kogut, A, Kohri, K, Komatsu, E, Komatsu, K, Konishi, K, Krachmalnicoff, N, Kreykenbohm, I, Kuo, CL, Kushino, A, Lamagna, L, Lanen, JV, Lattanzi, M, Lee, AT, Leloup, C, Levrier, F, Linder, E, Louis, T, Luzzi, G, MacIaszek, T, Maffei, B, Maino, D, Maki, M, Mandelli, S, Martinez-Gonzalez, E, Masi, S, Matsumura, T, Mennella, A, Migliaccio, M, Minami, Y, Mitsuda, K, Montgomery, J, Montier, L, Morgante, G, Mot, B, Murata, Y, Murphy, JA, Nagai, M, Nagano, Y, Nagasaki, T, Nagata, R, Nakamura, S, Namikawa, T, Natoli, P, Nerval, S, Nishibori, T, Nishino, H, O Sullivan, C, Ogawa, H, Ogawa, H, Oguri, S, Ohsaki, H, Ohta, IS, Okada, N, Okada, N, Pagano, L, Paiella, A, Paoletti, D, Patanchon, G, Peloton, J, Piacentini, F, Pisano, G, Polenta, G, Poletti, D, Prouve, T, Puglisi, G, Rambaud, D, Raum, C, Realini, S, Reinecke, M, Remazeilles, M, Ritacco, A, Roudil, G, Rubino-Martin, JA, Russell, M, Sakurai, H, Sakurai, Y, Sandri, M, Sasaki, M, Savini, G, Scott, D, Seibert, J, Sherwin, B, Shinozaki, K, Shiraishi, M, Shirron, P, Signorelli, G, Smecher, G, Stever, S, Stompor, R, Sugai, H, Sugiyama, S, Suzuki, A, Suzuki, J, Svalheim, TL, Switzer, E, Takaku, R, Takakura, H, Takakura, S, Takase, Y, Takeda, Y, Tartari, A, Taylor, E, Terao, Y, Thommesen, H, Thompson, KL, Thorne, B, Toda, T, Tomasi, M, Tominaga, M, Trappe, N, Tristram, M, Tsuji, M, Tsujimoto, M, Tucker, C, Ullom, J, Vermeulen, G, Vielva, P, Villa, F, Vissers, M, Vittorio, N, Wehus, I, Weller, J, Westbrook, B, Wilms, J, Winter, B, Wollack, EJ, Yamasaki, NY, Yoshida, T, Yumoto, J, Zannoni, M & Zonca, A 2020, Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD. in J Zmuidzinas & J-R Gao (eds), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X., 1145310, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11453, SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020, Virtual, Online, United States, 12/14/20. https://doi.org/10.1117/12.2561841

Sekimoto Y, Ade PAR, Adler A, Allys E, Arnold K, Auguste D et al. Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD. In Zmuidzinas J, Gao J-R, editors, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. SPIE. 2020. 1145310. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2561841

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title = "Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD",

abstract = "LiteBIRD has been selected as JAXA's strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the wide field-of-view (FoV) and broadband capabilities of millimeter-wave polarization measurements, which are derived from the system requirements. The possible paths of stray light increase with a wider FoV and the far sidelobe knowledge of-56 dB is a challenging optical requirement. A crossed-Dragone configuration was chosen for the low frequency telescope (LFT: 34-161 GHz), one of LiteBIRD's onboard telescopes. It has a wide field-of-view (18° x 9°) with an aperture of 400 mm in diameter, corresponding to an angular resolution of about 30 arcminutes around 100 GHz. The focal ratio f/3.0 and the crossing angle of the optical axes of 90a-▪ are chosen after an extensive study of the stray light. The primary and secondary reflectors have rectangular shapes with serrations to reduce the diffraction pattern from the edges of the mirrors. The reflectors and structure are made of aluminum to proportionally contract from warm down to the operating temperature at 5 K. A 1/4 scaled model of the LFT has been developed to validate the wide field-of-view design and to demonstrate the reduced far sidelobes. A polarization modulation unit (PMU), realized with a half-wave plate (HWP) is placed in front of the aperture stop, the entrance pupil of this system. A large focal plane with approximately 1000 AlMn TES detectors and frequency multiplexing SQUID amplifiers is cooled to 100 mK. The lens and sinuous antennas have broadband capability. Performance specifications of the LFT and an outline of the proposed verification plan are presented. ",

keywords = "Cosmic microwave background, cryogenic telescope, millimeter-wave polarization, space program",

author = "Y. Sekimoto and Ade, {P. A.R.} and A. Adler and E. Allys and K. Arnold and D. Auguste and J. Aumont and R. Aurlien and J. Austermann and C. Baccigalupi and Banday, {A. J.} and R. Banerji and Barreiro, {R. B.} and S. Basak and J. Beall and D. Beck and S. Beckman and J. Bermejo and {De Bernardis}, P. and M. Bersanelli and J. Bonis and J. Borrill and F. Boulanger and S. Bounissou and M. Brilenkov and M. Brown and M. Bucher and E. Calabrese and P. Campeti and A. Carones and Casas, {F. J.} and A. Challinor and V. Chan and K. Cheung and Y. Chinone and Cliche, {J. F.} and L. Colombo and F. Columbro and J. Cubas and A. Cukierman and D. Curtis and G. D'Alessandro and N. Dachlythra and {De Petris}, M. and C. Dickinson and P. Diego-Palazuelos and M. Dobbs and T. Dotani and L. Duband and S. Duff and Duval, {J. M.} and K. Ebisawa and T. Elleflot and Eriksen, {H. K.} and J. Errard and T. Essinger-Hileman and F. Finelli and R. Flauger and C. Franceschet and U. Fuskeland and M. Galloway and K. Ganga and Gao, {J. R.} and R. Genova-Santos and M. Gerbino and M. Gervasi and T. Ghigna and E. Gjerl{\o}w and Gradziel, {M. L.} and J. Grain and F. Grupp and A. Gruppuso and Gudmundsson, {J. E.} and {De Haan}, T. and Halverson, {N. W.} and P. Hargrave and T. Hasebe and M. Hasegawa and M. Hattori and M. Hazumi and S. Henrot-Versille and D. Herman and D. Herranz and Hill, {C. A.} and G. Hilton and Y. Hirota and E. Hivon and Hlozek, {R. A.} and Y. Hoshino and {De La Hoz}, E. and J. Hubmayr and K. Ichiki and T. Iida and H. Imada and K. Ishimura and H. Ishino and G. Jaehnig and T. Kaga and S. Kashima and N. Katayama and A. Kato and T. Kawasaki and R. Keskitalo and T. Kisner and Y. Kobayashi and N. Kogiso and A. Kogut and K. Kohri and E. Komatsu and K. Komatsu and K. Konishi and N. Krachmalnicoff and I. Kreykenbohm and Kuo, {C. L.} and A. Kushino and L. Lamagna and Lanen, {J. V.} and M. Lattanzi and Lee, {A. T.} and C. Leloup and F. Levrier and E. Linder and T. Louis and G. Luzzi and T. MacIaszek and B. Maffei and D. Maino and M. Maki and S. Mandelli and E. Martinez-Gonzalez and S. Masi and T. Matsumura and A. Mennella and M. Migliaccio and Y. Minami and K. Mitsuda and J. Montgomery and L. Montier and G. Morgante and B. Mot and Y. Murata and Murphy, {J. A.} and M. Nagai and Y. Nagano and T. Nagasaki and R. Nagata and S. Nakamura and T. Namikawa and P. Natoli and S. Nerval and T. Nishibori and H. Nishino and {O Sullivan}, C. and H. Ogawa and H. Ogawa and S. Oguri and H. Ohsaki and Ohta, {I. S.} and N. Okada and N. Okada and L. Pagano and A. Paiella and D. Paoletti and G. Patanchon and J. Peloton and F. Piacentini and G. Pisano and G. Polenta and D. Poletti and T. Prouve and G. Puglisi and D. Rambaud and C. Raum and S. Realini and M. Reinecke and M. Remazeilles and A. Ritacco and G. Roudil and Rubino-Martin, {J. A.} and M. Russell and H. Sakurai and Y. Sakurai and M. Sandri and M. Sasaki and G. Savini and D. Scott and J. Seibert and B. Sherwin and K. Shinozaki and M. Shiraishi and P. Shirron and G. Signorelli and G. Smecher and S. Stever and R. Stompor and H. Sugai and S. Sugiyama and A. Suzuki and J. Suzuki and Svalheim, {T. L.} and E. Switzer and R. Takaku and H. Takakura and S. Takakura and Y. Takase and Y. Takeda and A. Tartari and E. Taylor and Y. Terao and H. Thommesen and Thompson, {K. L.} and B. Thorne and T. Toda and M. Tomasi and M. Tominaga and N. Trappe and M. Tristram and M. Tsuji and M. Tsujimoto and C. Tucker and J. Ullom and G. Vermeulen and P. Vielva and F. Villa and M. Vissers and N. Vittorio and I. Wehus and J. Weller and B. Westbrook and J. Wilms and B. Winter and Wollack, {E. J.} and Yamasaki, {N. Y.} and T. Yoshida and J. Yumoto and M. Zannoni and A. Zonca",

note = "Funding Information: This work is supported in Japan by ISAS/JAXA for Pre-Phase A2 studies, by the acceleration program of JAXA research and development directorate, by the World Premier International Research Center Initiative (WPI) of MEXT, by the JSPS Core-to-Core Program of A. Advanced Research Networks, and by JSPS KAKENHI Grant Numbers JP15H05891, JP17H01115, and JP17H01125. The Italian LiteBIRD phase A contribution is supported by the Italian Space Agency (ASI Grants No. 2020-9-HH.0 and 2016-24-H.1-2018), the National Institute for Nuclear Physics (INFN) and the National Institute for Astrophysics (INAF). The French LiteBIRD phase A contribution is supported by the Centre National d{\textquoteright}Etudes Spatiale (CNES), by the Centre National de la Recherche Scientifique (CNRS), and by the Commissariat {\`a} l{\textquoteright}Energie Atomique (CEA). The Canadian contribution is supported by the Canadian Space Agency. The US contribution is supported by NASA grant no. 80NSSC18K0132. Norwegian participation in LiteBIRD is supported by the Research Council of Norway (Grant No. 263011). The Spanish LiteBIRD phase A contribution is supported by the Spanish Agencia Estatal de Investigaci{\'o}n (AEI), project refs. PID2019-110610RB-C21 and AYA2017-84185-P. Funds that support the Swedish contributions come from the Swedish National Space Agency (SNSA/Rymdstyrelsen) and the Swedish Research Council (Reg. no. 2019-03959). The German participation in LiteBIRD is supported in part by the Excellence Cluster ORIGINS, which is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy (Grant No. EXC-2094 - 390783311). This research used resources of the Central Computing System owned and operated by the Computing Research Center at KEK, as well as resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020 ; Conference date: 14-12-2020 Through 22-12-2020",

year = "2020",

doi = "10.1117/12.2561841",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Jonas Zmuidzinas and Jian-Rong Gao",

booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X",

}

TY - GEN

T1 - Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

AU - Sekimoto, Y.

AU - Ade, P. A.R.

AU - Adler, A.

AU - Allys, E.

AU - Arnold, K.

AU - Auguste, D.

AU - Aumont, J.

AU - Aurlien, R.

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N1 - Funding Information: This work is supported in Japan by ISAS/JAXA for Pre-Phase A2 studies, by the acceleration program of JAXA research and development directorate, by the World Premier International Research Center Initiative (WPI) of MEXT, by the JSPS Core-to-Core Program of A. Advanced Research Networks, and by JSPS KAKENHI Grant Numbers JP15H05891, JP17H01115, and JP17H01125. The Italian LiteBIRD phase A contribution is supported by the Italian Space Agency (ASI Grants No. 2020-9-HH.0 and 2016-24-H.1-2018), the National Institute for Nuclear Physics (INFN) and the National Institute for Astrophysics (INAF). The French LiteBIRD phase A contribution is supported by the Centre National d’Etudes Spatiale (CNES), by the Centre National de la Recherche Scientifique (CNRS), and by the Commissariat à l’Energie Atomique (CEA). The Canadian contribution is supported by the Canadian Space Agency. The US contribution is supported by NASA grant no. 80NSSC18K0132. Norwegian participation in LiteBIRD is supported by the Research Council of Norway (Grant No. 263011). The Spanish LiteBIRD phase A contribution is supported by the Spanish Agencia Estatal de Investigación (AEI), project refs. PID2019-110610RB-C21 and AYA2017-84185-P. Funds that support the Swedish contributions come from the Swedish National Space Agency (SNSA/Rymdstyrelsen) and the Swedish Research Council (Reg. no. 2019-03959). The German participation in LiteBIRD is supported in part by the Excellence Cluster ORIGINS, which is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy (Grant No. EXC-2094 - 390783311). This research used resources of the Central Computing System owned and operated by the Computing Research Center at KEK, as well as resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy. Publisher Copyright: © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

PY - 2020

Y1 - 2020

N2 - LiteBIRD has been selected as JAXA's strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the wide field-of-view (FoV) and broadband capabilities of millimeter-wave polarization measurements, which are derived from the system requirements. The possible paths of stray light increase with a wider FoV and the far sidelobe knowledge of-56 dB is a challenging optical requirement. A crossed-Dragone configuration was chosen for the low frequency telescope (LFT: 34-161 GHz), one of LiteBIRD's onboard telescopes. It has a wide field-of-view (18° x 9°) with an aperture of 400 mm in diameter, corresponding to an angular resolution of about 30 arcminutes around 100 GHz. The focal ratio f/3.0 and the crossing angle of the optical axes of 90a-▪ are chosen after an extensive study of the stray light. The primary and secondary reflectors have rectangular shapes with serrations to reduce the diffraction pattern from the edges of the mirrors. The reflectors and structure are made of aluminum to proportionally contract from warm down to the operating temperature at 5 K. A 1/4 scaled model of the LFT has been developed to validate the wide field-of-view design and to demonstrate the reduced far sidelobes. A polarization modulation unit (PMU), realized with a half-wave plate (HWP) is placed in front of the aperture stop, the entrance pupil of this system. A large focal plane with approximately 1000 AlMn TES detectors and frequency multiplexing SQUID amplifiers is cooled to 100 mK. The lens and sinuous antennas have broadband capability. Performance specifications of the LFT and an outline of the proposed verification plan are presented.

AB - LiteBIRD has been selected as JAXA's strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the wide field-of-view (FoV) and broadband capabilities of millimeter-wave polarization measurements, which are derived from the system requirements. The possible paths of stray light increase with a wider FoV and the far sidelobe knowledge of-56 dB is a challenging optical requirement. A crossed-Dragone configuration was chosen for the low frequency telescope (LFT: 34-161 GHz), one of LiteBIRD's onboard telescopes. It has a wide field-of-view (18° x 9°) with an aperture of 400 mm in diameter, corresponding to an angular resolution of about 30 arcminutes around 100 GHz. The focal ratio f/3.0 and the crossing angle of the optical axes of 90a-▪ are chosen after an extensive study of the stray light. The primary and secondary reflectors have rectangular shapes with serrations to reduce the diffraction pattern from the edges of the mirrors. The reflectors and structure are made of aluminum to proportionally contract from warm down to the operating temperature at 5 K. A 1/4 scaled model of the LFT has been developed to validate the wide field-of-view design and to demonstrate the reduced far sidelobes. A polarization modulation unit (PMU), realized with a half-wave plate (HWP) is placed in front of the aperture stop, the entrance pupil of this system. A large focal plane with approximately 1000 AlMn TES detectors and frequency multiplexing SQUID amplifiers is cooled to 100 mK. The lens and sinuous antennas have broadband capability. Performance specifications of the LFT and an outline of the proposed verification plan are presented.

KW - Cosmic microwave background

KW - cryogenic telescope

KW - millimeter-wave polarization

KW - space program

UR - http://www.scopus.com/inward/record.url?scp=85100032466&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85100032466&partnerID=8YFLogxK

U2 - 10.1117/12.2561841

DO - 10.1117/12.2561841

M3 - Conference contribution

AN - SCOPUS:85100032466

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X

A2 - Zmuidzinas, Jonas

A2 - Gao, Jian-Rong

PB - SPIE

T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020

Y2 - 14 December 2020 through 22 December 2020

ER -

Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

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