Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1
Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1
复制标题
适用于 Keck 阵列、Spider 和 Polar-1 的天线耦合 TES 测辐射热计
DOI：
10.1117/12.927214
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Yoon
中科院分区：
文献类型：
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作者：
R. O’Brient;P. Ade;Z. Ahmed;R. Aikin;M. Amiri;S. Benton;C. Bischoff;J. Bock;J. A. Bonetti;J. Brevik;B. Burger;G. Davis;P. Day;C. Dowell;L. Duband;J. Filippini;S. Fliescher;S. Golwala;J. Grayson;M. Halpern;M. Hasselfield;G. Hilton;V. Hristov;H. Hui;K. Irwin;S. Kernasovskiy;J. Kovac;C. Kuo;E. Leitch;M. Lueker;K. Megerian;L. Moncelsi;C. Netterfield;H. Nguyen;R. W. Ogburn;C. Pryke;C. Reintsema;J. Ruhl;M. Runyan;R. Schwarz;C. Sheehy;Z. Staniszewski;R. Sudiwala;G. Teply;J. Tolan;A. Turner;R. Tucker;A. Vieregg;D. Wiebe;P. Wilson;C. L. Wong;W. L. K. Wu;K. Yoon
在BICEP2和凯克阵列实验之间，我们部署了超过1500个双极化天线耦合辐射热计来绘制宇宙微波背景的极化。我们之所以能够快速部署这些探测器，是因为它们是完全平面的，带有集成相控阵天线。通过我们在这些实验中的经验，我们了解到这项技术的几个挑战-特别是天线中的波束合成-在本文中，我们报告了我们如何修改我们的设计来减轻这些挑战。我们特别讨论了毫米波电路中铌薄膜中由于微带串扰和穿透深度梯度引起的极化对光束质心之间的微分转向误差。我们还讨论了如何用天线照明方向图的高斯锥抑制旁瓣响应。这些改进将用于蜘蛛，极地1号和本赛季的凯克阵列改造。
Between the BICEP2 and Keck Array experiments, we have deployed over 1500 dual polarized antenna coupled bolometers to map the Cosmic Microwave Background’s polarization. We have been able to rapidly deploy these detectors because they are completely planar with an integrated phased-array antenna. Through our experience in these experiments, we have learned of several challenges with this technology- specifically the beam synthesis in the antenna- and in this paper we report on how we have modified our designs to mitigate these challenges. In particular, we discus differential steering errors between the polarization pairs’ beam centroids due to microstrip cross talk and gradients of penetration depth in the niobium thin films of our millimeter wave circuits. We also discuss how we have suppressed side lobe response with a Gaussian taper of our antenna illumination pattern. These improvements will be used in Spider, Polar-1, and this season’s retrofit of Keck Array.