In Situ Time Constant and Optical Efficiency Measurements of TRUCE Pixels in the Atacama B-Mode Search
In Situ Time Constant and Optical Efficiency Measurements of TRUCE Pixels in the Atacama B-Mode Search
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阿塔卡马 B 模式搜索中 TRUCE 像素的原位时间常数和光学效率测量
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Visnjic
中科院分区：
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作者：
S. Simon;J. Appel;H. Cho;T. Essinger;K. Irwin;K. Irwin;Akito Kusaka;M. Niemack;M. Nolta;L. Page;L. Parker;S. Raghunathan;J. Sievers;S. Staggs;K. Visnjic
阿塔卡马B模式搜索（ABS）仪器于2012年2月开始观测，是位于智利阿塔卡马沙漠海拔5，100米处的交叉Dragone望远镜。ABS的主要科学目标是测量宇宙微波背景的B模式偏振光谱，多极矩约为$$ell约$$$100到$$ell约$$$100（角标度从$${sim }0.4^circ $$10.4 <$到$${sim }4^circ $$$104 <$），这个范围包括来自暴胀引力波的原始B模式峰值。ABS焦平面阵列由240个像素组成，由TRUCE合作设计用于145 GHz的观测。每个像素都有自己独立的单模喇叭天线，并包含两个过渡边缘传感器测辐射热计，耦合到使用时域复用读出的正交偏振。我们将报告ABS的现状，并讨论TRUCE探测器在该领域的时间常数和光学效率。
The Atacama B-mode Search (ABS) instrument, which began observation in February of 2012, is a crossed-Dragone telescope located at an elevation of 5,100 m in the Atacama Desert in Chile. The primary scientific goal of ABS is to measure the B-mode polarization spectrum of the Cosmic Microwave Background from multipole moments of about $$ell approx $$ℓ≈ 50 to $$ell approx $$ℓ≈ 500 (angular scales from $${sim }0.4^circ $$∼0.4∘ to $${sim }4^circ $$∼4∘), a range that includes the primordial B-mode peak from inflationary gravitational waves. The ABS focal plane array consists of 240 pixels designed for observation at 145 GHz by the TRUCE collaboration. Each pixel has its own individual, single-moded feedhorn and contains two transition-edge sensor bolometers coupled to orthogonal polarizations that are read out using time domain multiplexing. We will report on the current status of ABS and discuss the time constants and optical efficiencies of the TRUCE detectors in the field.