基于改进噪声与串扰模型的SPT-3G数字频域复用读出系统性能与表征
天体物理仪器与方法
2022-02-23 v2 宇宙学与河外天体物理
摘要
第三代南极望远镜相机(SPT-3G)相比其前代(SPTpol)将焦平面上的探测器数量提高了一个数量级。用于读出和控制这些探测器的技术——数字频域复用(DfMUX)——在概念上与 SPTpol 所用相同，但进行了扩展以容纳更多探测器。读出工作带宽近 5 倍的扩展使得这一大焦平面得以使用，且 SPT-3G 的性能达到了与其科学目标相关的预测指标。然而，由于使用了更高频率以及与新低温电子架构相关的寄生阻抗，更高带宽读出的电动力学不同于基于 SPTpol 系统模型的预测。为此，我们给出了更高带宽 DfMUX 系统中电串扰的更新推导，并识别出两个先前未表征的读出噪声来源，它们在高频偏置下占主导。更新后的串扰与噪声模型成功描述了 SPT-3G 实测的串扰与读出噪声性能。这些结果还建议对常温电子元件取值、线束特性和 SQUID 参数进行具体改动，以改进未来使用 DfMUX 的 experiments 的读出系统，例如 LiteBIRD 空间望远镜。
引用
@article{arxiv.2103.16017,
title = {Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model},
author = {J. Montgomery and P. A. R. Ade and Z. Ahmed and E. Anderes and A. J. Anderson and M. Archipley and J. S. Avva and K. Aylor and L. Balkenhol and P. S. Barry and R. Basu Thakur and K. Benabed and A. N. Bender and B. A. Benson and F. Bianchini and L. E. Bleem and F. R. Bouchet and L. Bryant and K. Byrum and J. E. Carlstrom and F. W. Carter and T. W. Cecil and C. L. Chang and P. Chaubal and G. Chen and H. -M. Cho and T. -L. Chou and J. -F. Cliche and T. M. Crawford and A. Cukierman and C. Daley and T. de Haan and E. V. Denison and K. Dibert and J. Ding and M. A. Dobbs and D. Dutcher and T. Elleflot and W. Everett and C. Feng and K. R. Ferguson and A. Foster and J. Fu and S. Galli and A. E. Gambrel and R. W. Gardner and N. Goeckner-Wald and J. C. Groh and R. Gualtieri and S. Guns and N. Gupta and R. Guyser and N. W. Halverson and A. H. Harke-Hosemann and N. L. Harrington and J. W. Henning and G. C. Hilton and E. Hivon and W. L. Holzapfel and J. C. Hood and D. Howe and N. Huang and K. D. Irwin and O. B. Jeong and M. Jonas and A. Jones and T. S. Khaire and L. Knox and A. M. Kofman and M. Korman and D. L. Kubik and S. Kuhlmann and C. -L. Kuo and A. T. Lee and E. M. Leitch and A. E. Lowitz and C. Lu and S. S. Meyer and D. Michalik and M. Millea and A. Nadolski and T. Natoli and H. Nguyen and G. I. Noble and V. Novosad and Y. Omori and S. Padin and Z. Pan and P. Paschos and J. Pearson and C. M. Posada and K. Prabhu and W. Quan and A. Rahlin and C. L. Reichardt and D. Riebel and B. Riedel and M. Rouble and J. E. Ruhl and J. T. Sayre and E. Schiappucci and E. Shirokoff and G. Smecher and J. A. Sobrin and A. A. Stark and J. Stephen and K. T. Story and A. Suzuki and K. L. Thompson and B. Thorne and C. Tucker and C. Umilta and L. R. Vale and K. Vanderlinde and J. D. Vieira and G. Wang and N. Whitehorn and W. L. K. Wu and V. Yefremenko and K. W. Yoon and M. R. Young},
journal= {arXiv preprint arXiv:2103.16017},
year = {2022}
}
备注
Accepted to the Journal of Astronomical Telescopes, Instruments, and Systems