QUBIC VI：低温半波片旋转器设计与性能
天体物理仪器与方法
2022-04-27 v2 宇宙学与河外天体物理
摘要
暴胀引力波 B 模偏振探测是当今全球大角尺度宇宙微波背景（CMB）实验的最终目标。目前正大力部署许多地基、气球载和卫星实验，采用不同方法将这一微弱偏振成分从入射辐射中分离出来。其中一种广泛使用的技术是斯托克斯偏振测量术，它利用旋转半波片（HWP）和线性偏振器以较低残余交叉偏振来分离和调制偏振分量。本文描述了 QUBIC 斯托克斯偏振计，重点介绍其设计特点和性能。这类装置的一个常见系统误差是产生与旋转同步且与光学元件发射率成正比的大虚假信号。QUBIC 斯托克斯偏振计的一个关键特点是在低温下工作，以最小化这一不需要的成分。在低温下高效移动这一大光学元件构成了降低摩擦功耗的重大工程挑战。在设计阶段高度重视最小化各部件之间的差热收缩。旋转由置于低温恒温器外的步进电机驱动，以避免在低温下产生热负载耗散。本工作给出的测试和结果表明，仅利用步进电机精度和光学绝对编码器，QUBIC 偏振计就能轻松实现低于 0.1{°} 的定位精度。旋转在第二级低温级（约 8 K）上仅引起几 mK 的额外功率负载。
引用
@article{arxiv.2008.10667,
title = {QUBIC VI: cryogenic half wave plate rotator, design and performances},
author = {G. D'Alessandro and L. Mele and F. Columbro and G. Amico and E. S. Battistelli and P. de Bernardis and A. Coppolecchia and M. De Petris and L. Grandsire and J. -Ch. Hamilton and L. Lamagna and S. Marnieros and S. Masi and A. Mennella and C. O'Sullivan and A. Paiella and F. Piacentini and M. Piat and G. Pisano and G. Presta and A. Tartari and S. A. Torchinsky and F. Voisin and M. Zannoni and P. Ade and J. G. Alberro and A. Almela and L. H. Arnaldi and D. Auguste and J. Aumont and S. Azzoni and S. Banfi and B. Bélier and A. Baù and D. Bennett and L. Bergé and J. -Ph. Bernard and M. Bersanelli and M. -A. Bigot-Sazy and J. Bonaparte and J. Bonis and E. Bunn and D. Burke and D. Buzi and F. Cavaliere and P. Chanial and C. Chapron and R. Charlassier and A. C. Cobos Cerutti and G. De Gasperis and M. De Leo and S. Dheilly and C. Duca and L. Dumoulin and A. Etchegoyen and A. Fasciszewski and L. P. Ferreyro and D. Fracchia and C. Franceschet and M. M. Gamboa Lerena and K. M. Ganga and B. García and M. E. García Redondo and M. Gaspard and D. Gayer and M. Gervasi and M. Giard and V. Gilles and Y. Giraud-Heraud and M. Gómez Berisso and M. González and M. Gradziel and M. R. Hampel and D. Harari and S. Henrot-Versillé and F. Incardona and E. Jules and J. Kaplan and C. Kristukat and S. Loucatos and T. Louis and B. Maffei and W. Marty and A. Mattei and A. May and M. McCulloch and D. Melo and L. Montier and L. Mousset and L. M. Mundo and J. A. Murphy and J. D. Murphy and F. Nati and E. Olivieri and C. Oriol and F. Pajot and A. Passerini and H. Pastoriza and A. Pelosi and C. Perbost and M. Perciballi and F. Pezzotta and L. Piccirillo and M. Platino and G. Polenta and D. Prêle and R. Puddu and D. Rambaud and E. Rasztocky and P. Ringegni and G. E. Romero and J. M. Salum and A. Schillaci and C. G. Scóccola and S. Scully and S. Spinelli and G. Stankowiak and M. Stolpovskiy and A. D. Supanitsky and J. -P. Thermeau and P. Timbie and M. Tomasi and G. Tucker and C. Tucker and D. Viganò and N. Vittorio and F. Wicek and M. Wright and A. Zullo},
journal= {arXiv preprint arXiv:2008.10667},
year = {2022}
}
备注
Part of a series of 8 papers on QUBIC to be submitted to a special issue of JCAP