Variable-delay polarization modulators for cryogenic millimeter-wave applications.
Variable-delay polarization modulators for cryogenic millimeter-wave applications.
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用于低温毫米波应用的可变延迟偏振调制器。
DOI：
10.1063/1.4879499
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Edward J. Wollack
中科院分区：
文献类型：
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作者：
D. Chuss;J. Eimer;D. Fixsen;J. Hinderks;A. Kogut;J. Lazear;P. Mirel;E. Switzer;G. Voellmer;Edward J. Wollack
我们描述的设计，施工，和初步验证的可变延迟偏振调制器（VPM）设计的PIPER宇宙微波背景偏振计。VPM通过在正交线偏振之间引入可变相位延迟来在线偏振和圆偏振之间进行调制。每个VPM的直径为39厘米，设计用于在低温环境（1.5 K）中运行。我们描述的机械设计和性能的运动双叶片弯曲和驱动机构沿着与高精度线栅偏振器的建设。
We describe the design, construction, and initial validation of the variable-delay polarization modulator (VPM) designed for the PIPER cosmic microwave background polarimeter. The VPM modulates between linear and circular polarization by introducing a variable phase delay between orthogonal linear polarizations. Each VPM has a diameter of 39 cm and is engineered to operate in a cryogenic environment (1.5 K). We describe the mechanical design and performance of the kinematic double-blade flexure and drive mechanism along with the construction of the high precision wire grid polarizers.