| タイトル | Variable-Delay Polarization Modulators for Cryogenic Millimeter-Wave Applications |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140013294 |
| 著者（英） | Fixsen, D. J.; Chuss, D. T.; Eimer, J. R.; Switzer, E.; Mirel, P.; Hinderks, J.; Wollack, E. J..; Lazear, J.; Kogut, A. J.; Voellmer, G. M. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2014-05-12 |
| 言語 | eng |
| 内容記述 | 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. |
| NASA分類 | Instrumentation and Photography; Mechanical Engineering; Optics |
| レポートNO | GSFC-E-DAA-TN15161 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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