LiteBIRD: a small satellite for the study of B-mode polarization and inflation from cosmic background radiation detection
LiteBIRD: a small satellite for the study of B-mode polarization and inflation from cosmic background radiation detection
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LiteBIRD：一颗小型卫星，用于研究宇宙背景辐射探测中的 B 模式偏振和膨胀
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
K. Yotsumoto
中科院分区：
文献类型：
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作者：
M. Hazumi;J. Borrill;Y. Chinone;M. Dobbs;H. Fuke;A. Ghribi;M. Hasegawa;K. Hattori;M. Hattori;W. Holzapfel;Y. Inoue;K. Ishidoshiro;H. Ishino;K. Karatsu;N. Katayama;I. Kawano;A. Kibayashi;Y. Kibe;N. Kimura;K. Koga;E. Komatsu;Adrian T. Lee;H. Matsuhara;T. Matsumura;S. Mima;K. Mitsuda;H. Morii;S. Murayama;M. Nagai;R. Nagata;S. Nakamura;K. Natsume;H. Nishino;A. Noda;T. Noguchi;I. Ohta;C. Otani;P. Richards;S. Sakai;N. Sato;Y. Sato;Y. Sekimoto;A. Shimizu;K. Shinozaki;H. Sugita;A. Suzuki;T. Suzuki;O. Tajima;S. Takada;Y. Takagi;Y. Takei;T. Tomaru;Yoshinori Uzawa;Hiroki Watanabe;N. Yamasaki;M. Yoshida;T. Yoshida;K. Yotsumoto
LiteBIRD [用于研究宇宙背景辐射探测的B模式偏振和暴胀的Lite（Light）卫星]是一颗小型卫星，以前所未有的精度绘制大角度范围的全天空宇宙微波背景辐射偏振图。宇宙暴胀是解决大爆炸理论问题的主要假设，它预言原初引力波是在暴胀时期产生的。对宇宙微波背景辐射偏振的测量被认为是探测原初引力波的最佳探测手段。LiteBIRD工作组由日本空间科学指导委员会授权，并得到日本宇宙航空研究开发机构的支持。它有来自日本，美国和加拿大的50多名成员。LiteBIRD的科学目标是测试所有满足单场慢滚条件并处于大场状态的代表性暴胀模型。为此，LiteBIRD对张量标量比r的精度要求等于或小于0.001。我们的基线设计采用了一个阵列的多色超导偏振仪，读出高复用因子在频域中的紧凑的焦平面。在100 mK下，用2000个TES测辐射热计实现了1.8μKarcmin的所需灵敏度。低温系统以为SPICA开发的斯特林/JT技术为基础，连续ADR系统与未来的X射线卫星共享设计。
LiteBIRD [Lite (Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection] is a small satellite to map the polarization of the cosmic microwave background (CMB) radiation over the full sky at large angular scales with unprecedented precision. Cosmological inflation, which is the leading hypothesis to resolve the problems in the Big Bang theory, predicts that primordial gravitational waves were created during the inflationary era. Measurements of polarization of the CMB radiation are known as the best probe to detect the primordial gravitational waves. The LiteBIRD working group is authorized by the Japanese Steering Committee for Space Science (SCSS) and is supported by JAXA. It has more than 50 members from Japan, USA and Canada. The scientific objective of LiteBIRD is to test all the representative inflation models that satisfy single-field slow-roll conditions and lie in the large-field regime. To this end, the requirement on the precision of the tensor-to-scalar ratio, r, at LiteBIRD is equal to or less than 0.001. Our baseline design adopts an array of multi-chroic superconducting polarimeters that are read out with high multiplexing factors in the frequency domain for a compact focal plane. The required sensitivity of 1.8μKarcmin is achieved with 2000 TES bolometers at 100mK. The cryogenic system is based on the Stirling/JT technology developed for SPICA, and the continuous ADR system shares the design with future X-ray satellites.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.