The POLARBEAR-2 and Simons Array Focal Plane Fabrication Status
The POLARBEAR-2 and Simons Array Focal Plane Fabrication Status
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POLARBEAR-2 和西蒙斯阵列焦平面制造现状
DOI：
10.1007/s10909-018-2059-0
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发表时间：
2018
影响因子：
2
通讯作者：
Y. Chinone、Hasegawa M.、Hazumi M.、Katayama N、Tajima O、Tomaru T.、et al.
中科院分区：
文献类型：
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作者：
Westbrook B.;Y. Chinone、Hasegawa M.、Hazumi M.、Katayama N、Tajima O、Tomaru T.、et al.
介绍了偏振熊-2A（PB 2-A）焦平面的制作现状。PB 2-A是西蒙斯阵列中三台望远镜中的第一台，西蒙斯阵列是位于智利北方的POLARBEAR站点的三台宇宙微波背景偏振敏感望远镜阵列。作为PB实验的后继者，每个望远镜和接收器组合被命名为PB 2-A、PB 2-B和PB 2-C。PB 2-A和-B将具有工作在90和150 GHz的几乎相同的接收器，而PB 2-C将容纳工作在220和270 GHz的接收器。每个接收器包含一个焦平面组成的七个紧密的六角形包装小透镜耦合的正弦天线过渡边缘传感器测辐射热计阵列。每个阵列包含271个二向色光学像素，每个像素具有四个TES测辐射热计，每个接收器总共有7588个探测器。我们已经为PB 2-A产生了一组两种类型的候选阵列。第一种我们称之为版本11（V11），使用氧化硅（SiO）作为传输线，交叉过程用于正交极化。第二种我们称之为版本13（V13），使用氮化硅（SiN）作为传输线，并使用交叉工艺进行正交极化。我们已经生产了足够的每种类型的阵列，以充分填充PB 2-A接收器的焦平面。V11和V13阵列的平均引线键合成品率分别为93.2%和95.6%。V11阵列在90和150 GHz频段的超导转变温度为mK，法向电阻为，饱和功率分别为pW和pW。V13阵列在90和150 GHz频段的超导转变温度为mK，法向电阻为，饱和功率分别为pW和pW。PB 2-B阵列的生产和表征正在进行中，预计将于2018年夏季完成。我们已经制造了PB 2-C的前三个候选阵列，但目前没有任何表征结果。
We present on the status of POLARBEAR-2 A (PB2-A) focal plane fabrication. The PB2-A is the first of three telescopes in the Simons Array, which is an array of three cosmic microwave background polarization-sensitive telescopes located at the POLARBEAR site in Northern Chile. As the successor to the PB experiment, each telescope and receiver combination is named as PB2-A, PB2-B, and PB2-C. PB2-A and -B will have nearly identical receivers operating at 90 and 150 GHz while PB2-C will house a receiver operating at 220 and 270 GHz. Each receiver contains a focal plane consisting of seven close-hex packed lenslet-coupled sinuous antenna transition edge sensor bolometer arrays. Each array contains 271 dichroic optical pixels, each of which has four TES bolometers for a total of 7588 detectors per receiver. We have produced a set of two types of candidate arrays for PB2-A. The first we call Version 11 (V11) uses a silicon oxide (SiO) for the transmission lines and crossover process for orthogonal polarizations. The second we call Version 13 (V13) uses silicon nitride (SiN) for the transmission lines and cross-under process for orthogonal polarizations. We have produced enough of each type of array to fully populate the focal plane of the PB2-A receiver. The average wirebond yield for V11 and V13 arrays is 93.2% and 95.6%, respectively. The V11 arrays had a superconducting transition temperature () ofmK, a normal resistance () of, and saturation powers ofpW andpW for the 90 and 150 GHz bands, respectively. The V13 arrays had a superconducting transition temperature () ofmK, a normal resistance () of, and saturation powers ofpW andpW for the 90 and 150 GHz bands, respectively. Production and characterization of arrays for PB2-B are ongoing and are expected to be completed by the summer of 2018. We have fabricated the first three candidate arrays for PB2-C but do not have any characterization results to present at this time.