CMB B 模偏振卫星 LiteBIRD 低频望远镜概念设计
天体物理仪器与方法
2021-01-19 v1 宇宙学与河外天体物理
摘要
LiteBIRD 已被选为 JAXA 在 2020 年代的战略大型任务，用于在大角尺度上对全天宇宙微波背景（CMB） 模偏振进行观测。LiteBIRD 的挑战来自系统需求所衍生的毫米波偏振测量的宽视场（FoV）与宽带能力。杂散光的可能路径随视场变宽而增加，而 dB 的远旁瓣指标是一项具有挑战性的光学要求。LiteBIRD 的星载望远镜之一——低频望远镜（LFT：34–161 GHz）采用了交叉 Dragone 构型。它具有 的宽视场与 400 mm 直径孔径，对应于约 100 GHz 附近 30 角分角分辨率。在经过对杂散光的广泛研究后，选择了 f/3.0 的焦比与 90 的光轴交叉角。主副反射镜为带锯齿的矩形，以降低镜面边缘的衍射图样。反射镜与结构由铝制成，可从常温按比例收缩至 K 的工作温度。已研制 LFT 的 1/4 缩比模型，以验证宽视场设计并演示降低的远旁瓣。偏振调制单元（PMU）由半波片（HWP）实现，置于孔径光阑（该系统的入瞳）之前。约 1000 个 AlMn TES 探测器与频分复用 SQUID 放大器组成的大型焦平面被冷却至 100 mK。透镜与正弦天线具有宽带能力。本文给出了 LFT 的性能指标及所提验证计划概要。
引用
@article{arxiv.2101.06342,
title = {Concept Design of Low Frequency Telescope for CMB B-mode Polarization satellite LiteBIRD},
author = {Y. Sekimoto and P. A. R. Ade 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 A. J. Banday and R. Banerji and R. B. Barreiro and S. Basak and J. Beall and D. Beck and S. Beckman and J. Bermejo and P. de Bernardis 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 F. J. Casas and A. Challinor and V. Chan and K. Cheung and Y. Chinone and J. F. Cliche and L. Colombo and F. Columbro and J. Cubas and A. Cukierman and D. Curtis and G. D'Alessandro and N. Dachlythra and M. De Petris and C. Dickinson and P. Diego-Palazuelos and M. Dobbs and T. Dotani and L. Duband and S. Duff and J. M. Duval and K. Ebisawa and T. Elleflot and H. K. Eriksen 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 J. R. Gao and R. Genova-Santos and M. Gerbino and M. Gervasi and T. Ghigna and E. Gjerløw and M. L. Gradziel and J. Grain and F. Grupp and A. Gruppuso and J. E. Gudmundsson and T. de Haan and N. W. Halverson and P. Hargrave and T. Hasebe and M. Hasegawa and M. Hattori and M. Hazumi and S. Henrot-Versillé and D. Herman and D. Herranz and C. A. Hill and G. Hilton and Y. Hirota and E. Hivon and R. A. Hlozek and Y. Hoshino and E. de la Hoz 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 C. L. Kuo and A. Kushino and L. Lamagna and J. V. Lanen and M. Lattanzi and A. T. Lee 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. Minanmi and K. Mitsuda and J. Montgomery and L. Montier and G. Morgante and B. Mot and Y. Murata and J. A. Murphy 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 C. O'Sullivan and H. Ogawa and H. Ogawa and S. Oguri and H. Ohsaki and I. S. Ohta 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. Prouvé 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 J. A. Rubino-Martin 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 T. L. Svalheim 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 K. L. Thompson 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 E. J. Wollack and N. Y. Yamasaki and T. Yoshida and J. Yumoto and M. Zannoni and A. Zonca},
journal= {arXiv preprint arXiv:2101.06342},
year = {2021}
}
备注
21 pages, 14 figures