Planck-LFI：4 开尔文参考负载单元的设计与性能
天体物理仪器与方法
2010-01-27 v1 宇宙学与河外天体物理
摘要
LFI 辐射计采用伪相关设计，其中来自天空的信号与稳定的参考信号连续比较，该参考信号由低温参考负载系统提供。参考单元由小型角锥喇叭组成，每个辐射计一个，共 22 个，面向由商业树脂 ECCOSORB CR (TM) 制成的小型吸收目标，冷却至约 4.5 K。喇叭和目标之间由一个小间隙隔开以实现热去耦。目标和喇叭的设计针对每个 LFI 波段（中心频率为 70、44 和 30 GHz）进行了优化。角锥喇叭要么在辐射计 20K 模块内部加工，要么通过外部电铸弯曲波导连接。参考信号的高稳定性要求对负载的辐射测量和热性能进行精心设计。制造所用材料的热、射频和机械性能已得到表征。本文描述了参考系统的设计和性能。
引用
@article{arxiv.1001.4778,
title = {Planck-LFI: Design and Performance of the 4 Kelvin Reference Load Unit},
author = {Luca Valenziano and Francesco Cuttaia and Adriano De Rosa and Luca Terenzi and Alberto Brighenti and GianPaolo Cazzola and Anna Garbesi and Sergio Mariotti and Giordano Orsi and Luca Pagan and Francesco Cavaliere and Roberto Lapini and Matteo Biggi and Enzo Panagin and Battaglia Paola and Chris Butler and Marco Bersanelli and Ocleto D'Arcangelo and Steve Levin and Nazzareno Mandolesi and Aniello Mennella and Gianluca Morgante and Gabriele Morigi and Maura Sandri and Alessandro Simonetto and Maurizio Tomasi and Fabrizio Villa and Marco Frailis and Samuele Galeotta and Anna Gregorio and Rodrigo Leonardi and Stuart Lowe and Michele Maris and Peter Meinhold and Luis Mendes and Luca Stringhetti and Andrea Zonca and Andrea Zacchei},
journal= {arXiv preprint arXiv:1001.4778},
year = {2010}
}
备注
This is an author-created, un-copyedited version of an article accepted for publication in JINST. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at [10.1088/1748-0221/4/12/T12006]. 14 pages, 34 figures