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arXiv 1402.2591astro-ph.IM
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蜘蛛型宇宙微波背景偏振计的半波片

Half-wave Plates for the Spider Cosmic Microwave Background Polarimeter

Sean Bryan

摘要:

蜘蛛号是一个由六个望远镜组成的气球阵列,将观测宇宙微波背景。仪器中的2400个天线耦合测辐射热计将在150 GHz和95 GHz处以~度分辨率绘制CMB的偏振图。偏振调制是通过一个低温蓝宝石半波片(HWP)的主要光学天空。本文讨论了HWP系统的设计、构建和实验室测试。使用物理光学计算和Mueller矩阵对这些光学堆叠的偏振调制进行建模。在实验室和集成在飞行低温恒温器的性能测试表明与模型一致。

英文摘要:

Spider is a balloon-borne array of six telescopes that will observe the Cosmic Microwave Background. The 2400 antenna-coupled bolometers in the instrument will make a polarization map of the CMB with ~degree resolution at 150 GHz and 95 GHz. Polarization modulation is achieved via a cryogenic sapphire half-wave plate (HWP) skyward of the primary optic. In this thesis, the design, construction, and lab testing of the HWP system are discussed. The polarization modulation of these optical stacks is modeled using a physical optics calculation and Mueller matrices. Performance tests in both the lab and integrated in the flight cryostat show consistency with the model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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