Characterization of the Atacama B-mode Search
Characterization of the Atacama B-mode Search
复制标题
阿塔卡马 B 模式搜索的特征
DOI：
10.1117/12.2055576
复制
发表时间：
2014
影响因子：
3.5
通讯作者：
K. Visnjic
中科院分区：
文献类型：
--
作者：
S. Simon;S. Raghunathan;J. Appel;Dan Becker;L. Campusano;H. Cho;T. Essinger;S. Ho;K. Irwin;K. Irwin;N. Jarosik;A. Kusaka;M. Niemack;G. Nixon;M. Nolta;L. Page;Gonzalo A. Palma;L. Parker;J. Sievers;S. Staggs;K. Visnjic
阿塔卡马B模式搜索(ABS)于2012年2月开始观测，是一台位于智利阿塔卡马沙漠海拔5190米的交叉德拉贡望远镜。美国国家航空航天局正在从~50~500的多极矩中寻找大角度尺度的宇宙微波背景(CMB)的B模偏振谱，这个范围包括从~100的膨胀重力波中获得的主轴B模峰值。ABS焦平面由240个像素组成，每个像素敏感于145 GHz，每个像素包含两个过渡边缘传感器测辐射热计，它们通过平面正交模换能器耦合到正交偏振。常温连续旋转半波片和4K光学元件使ABS仪器独一无二。我们讨论了用傅里叶变换光谱仪表征探测器的光谱响应，并证明了指向模型是适当的。我们还给出了来自点光源的束流测量结果，并与模拟结果进行了比较。
The Atacama B-mode Search (ABS), which began observations in February of 2012, is a crossed-Dragone telescope located at an elevation of 5190 m in the Atacama Desert in Chile. ABS is searching for the B-mode polarization spectrum of the cosmic microwave background (CMB) at large angular scales from multipole moments of ` ~ 50 ~ 500, a range that includes the primor- dial B-mode peak from inflationary gravity waves at ~ 100. The ABS focal plane consists of 240 pixels sensitive to 145 GHz, each containing two transition-edge sensor bolometers coupled to orthogonal polarizations with a planar ortho-mode transducer. An ambient-temperature con- tinuously rotating half-wave plate and 4 K optics make the ABS instrument unique. We discuss the characterization of the detector spectral responses with a Fourier transform spectrometer and demonstrate that the pointing model is adequate. We also present measurements of the beam from point sources and compare them with simulations.
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.