Modeling and characterization of the SPIDER half-wave plate

Modeling and characterization of the SPIDER half-wave plate
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SPIDER 半波片的建模和表征

DOI:
10.1117/12.857837
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发表时间:
2010
期刊:
--
影响因子:
--
通讯作者:
Bryan S
Bryan S
中科院分区:
--
文献类型:
--
作者:
Bryan S

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Spider 是一个气球载的六台望远镜阵列,将观测宇宙微波背景。仪器中的 2624 个天线耦合测辐射热计将在 145 GHz 下生成 CMB 的偏振图,分辨率约为二分之一度。偏振调制是通过主光学器件上方的低温蓝宝石半波片 (HWP) 实现的。我们测量了蓝宝石在室温和低温下的毫米波透射光谱。光谱与我们的物理光学模型一致,并且数据可以很好地测量 A 切蓝宝石的指数。我们还获取了原型 Spider 接收器中集成 HWP、光学系统和探测器的初步光谱。我们计算了观察 CMB 和前景光谱之间 HWP 响应的变化,并估计它不应限制 Spider 对通货膨胀的限制。
Spider is a balloon-borne array of six telescopes that will observe the Cosmic Microwave Background. The 2624 antenna-coupled bolometers in the instrument will make a polarization map of the CMB with approximately one-half degree resolution at 145 GHz. Polarization modulation is achieved via a cryogenic sapphire half-wave plate (HWP) skyward of the primary optic. We have measured millimeter-wave transmission spectra of the sapphire at room and cryogenic temperatures. The spectra are consistent with our physical optics model, and the data gives excellent measurements of the indices of A-cut sapphire. We have also taken preliminary spectra of the integrated HWP, optical system, and detectors in the prototype Spider receiver. We calculate the variation in response of the HWP between observing the CMB and foreground spectra, and estimate that it should not limit the Spider constraints on inflation.
DOI: 10.1364/ao.45.008907
发表时间: 2006-12
期刊: Applied optics
影响因子: 1.9
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发表时间: 2010
期刊: --
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发表时间: 2010
期刊: Astronomical Telescopes + Instrumentation
影响因子: --
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