Optical Design and Characterization of 40-GHz Detector and Module for the BICEP Array
Optical Design and Characterization of 40-GHz Detector and Module for the BICEP Array
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BICEP 阵列 40 GHz 探测器和模块的光学设计和表征
DOI：
10.1007/s10909-019-02299-z
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发表时间：
2020
影响因子：
2
通讯作者：
Bullock, E.
中科院分区：
文献类型：
--
作者：
Soliman, A.;Ade, P. A.;Ahmed, Z.;Amiri, M.;Barkats, D.;Thakur, R. Basu;Bischoff, C. A.;Bock, J. J.;Boenish, H.;Bullock, E.
宇宙暴胀模型家族预言了一个原始引力波背景，它在宇宙微波背景（CMB）中留下了B模偏振图案。需要具有宽频率覆盖范围和良好控制的系统误差的高灵敏度仪器来限制微弱的B模式振幅。我们已经开发了天线耦合过渡边缘传感器阵列的高灵敏度极化CMB的意见在广泛的毫米波波段。BICEP阵列是BICEP/Keck实验系列的最新阶段，是一个多接收器实验，旨在通过3年的观测，根据前景的复杂性和透镜去除的程度，以0.002和0.004之间的精度搜索暴胀B模式偏振。我们描述的电磁设计和测量性能的BICEP阵列的低频40 GHz的探测器，它们的封装在焦平面模块，和光学特性，包括效率和偏振对之间的光束匹配。我们总结了设计和模拟的光学性能，包括一种方法来提高由于失配损耗的光效率。我们报告了一种新的宽带反射镜设计的测量光束图，以最大限度地减少与模块外壳框架相互作用引起的偏振对之间的光束微分椭圆率，这有助于最大限度地减少将CMB温度转换为CMB图中的偏振（）各向异性的偏振光束失配。
Families of cosmic inflation models predict a primordial gravitational-wave background that imprints B-mode polarization pattern in the cosmic microwave background (CMB). High-sensitivity instruments with wide frequency coverage and well-controlled systematic errors are needed to constrain the faint B-mode amplitude. We have developed antenna-coupled transition edge sensor arrays for high-sensitivity polarized CMB observations over a wide range of millimeter-wave bands. BICEP array, the latest phase of the BICEP/Keck experiment series, is a multi-receiver experiment designed to search for inflationary B-mode polarization to a precisionbetween 0.002 and 0.004 after 3 full years of observations, depending on foreground complexity and the degree of lensing removal. We describe the electromagnetic design and measured performance of BICEP array’s low-frequency 40-GHz detector, their packaging in focal plane modules, and optical characterization including efficiency and beam matching between polarization pairs. We summarize the design and simulated optical performance, including an approach to improve the optical efficiency due to mismatch losses. We report the measured beam maps for a new broadband corrugation design to minimize beam differential ellipticity between polarization pairs caused by interactions with the module housing frame, which helps minimize polarized beam mismatch that converts CMB temperature to polarization () anisotropy in CMB maps.
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DOI：
10.3847/1538-4357/ab391d
发表时间：
2019
期刊：
The Astrophysical Journal
影响因子：
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作者：
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DOI：
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发表时间：
2018
期刊：
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影响因子：
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作者：
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DOI：
10.1117/12.2311725
发表时间：
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期刊：
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影响因子：
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作者：
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二头肌2/KECK 阵列。
DOI：
10.1088/0004-637x/806/2/206
发表时间：
2015
期刊：
The Astrophysical Journal
影响因子：
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作者：
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