Optical characterization of the BICEP3 CMB polarimeter at the South Pole
Optical characterization of the BICEP3 CMB polarimeter at the South Pole
复制标题
BICEP3 CMB 偏振计在南极的光学特性
DOI：
10.1117/12.2231747
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Yoon
中科院分区：
文献类型：
--
作者：
K. Karkare;P. Ade;Z. Ahmed;K. Alexander;M. Amiri;D. Barkats;S. Benton;C. Bischoff;J. Bock;H. Boenish;R. Bowens;I. Buder;E. Bullock;V. Buza;J. Connors;J. Filippini;S. Fliescher;J. Grayson;M. Halpern;S. Harrison;G. Hilton;V. Hristov;H. Hui;K. Irwin;J. Kang;E. Karpel;S. Kefeli;S. Kernasovskiy;J. Kovac;C. Kuo;E. Leitch;M. Lueker;K. Megerian;V. Monticue;T. Namikawa;C. Netterfield;H. Nguyen;R. O’Brient;R. W. Ogburn;C. Pryke;C. Reintsema;S. Richter;M. T. St. Germaine;R. Schwarz;C. Sheehy;Z. Staniszewski;B. Steinbach;G. Teply;K. Thompson;J. Tolan;C. Tucker;A. Turner;A. Vieregg;A. Wandui;A. Weber;J. Willmert;C. L. Wong;W. L. K. Wu;K. Yoon
BICEP3是一种小口径折射宇宙微波背景（CMB）望远镜，旨在绘制敏感的极化图，以寻找暴胀引力波中潜在的b模式信号。这是位于南极的二头肌/凯克阵列（Bicep/Keck Array）系列CMB实验中最新的一个，该实验提供了迄今为止最严格的暴胀约束。在2016年的观测季节，BICEP3配备了全套的2400个光学耦合探测器，工作频率为95 GHz。在这些论文中，我们报告了远场光束的性能，使用了2015-2016年夏季部署季节使用热斩波源进行的校准数据。我们生成了高保真的每个探测器光束图，显示了阵列平均光束轮廓，并表征了位于同一位置的正交极化探测器之间的差分光束响应，这有助于在对差分实验中领先的仪器系统。我们发现差分指向、波束宽度和椭圆度的水平与Bicep2和Keck阵列的测量值相似或更低。Bicep3的差光束失配的大小和分布——以及在分析中温度对极化泄漏可能被边缘化或减去的水平——将为下一代数千个探测器的CMB实验的设计提供信息。
BICEP3 is a small-aperture refracting cosmic microwave background (CMB) telescope designed to make sensitive polarization maps in pursuit of a potential B-mode signal from inflationary gravitational waves. It is the latest in the Bicep/Keck Array series of CMB experiments located at the South Pole, which has provided the most stringent constraints on inflation to date. For the 2016 observing season, BICEP3 was outfitted with a full suite of 2400 optically coupled detectors operating at 95 GHz. In these proceedings we report on the far field beam performance using calibration data taken during the 2015-2016 summer deployment season in situ with a thermal chopped source. We generate high-fidelity per-detector beam maps, show the array-averaged beam profile, and characterize the differential beam response between co-located, orthogonally polarized detectors which contributes to the leading instrumental systematic in pair differencing experiments. We find that the levels of differential pointing, beamwidth, and ellipticity are similar to or lower than those measured for Bicep2 and Keck Array. The magnitude and distribution of Bicep3’s differential beam mismatch – and the level to which temperature-to-polarization leakage may be marginalized over or subtracted in analysis - will inform the design of next-generation CMB experiments with many thousands of detectors.
影响因子：
8.6
作者：
Ade, P. A. R.;Aikin, R. W.;Yoon, K. W.
通讯作者：
Yoon, K. W.