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首页> 外文期刊>Optics Letters >Cryogenic-temperature profiling of high-power superconducting lines using local and distributed optical-fiber sensors
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Cryogenic-temperature profiling of high-power superconducting lines using local and distributed optical-fiber sensors

机译：使用本地和分布式光纤传感器的大功率超导线的低温温度分析

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This contribution presents distributed and multipoint fiber-optic monitoring of cryogenic temperatures along a superconducting power transmission line down to 30 K and over 20 m distance. Multipoint measurements were conducted using fiber Bragg gratings sensors coated with two different functional overlays (epoxy and poly methyl methacrylate (PMMA)) demonstrating cryogenic operation in the range 300-4.2 K. Distributed measurements exploited optical frequency-domain reflectometry to analyze the Rayleigh scattering along two concatenated fibers with different coatings (acrylate and polyimide). The integrated system has been placed along the 20 m long cryostat of a superconducting power transmission line, which is currently being tested at the European Organization for Nuclear Research (CERN). Cool-down events from 300-30 K have been successfully measured in space and time, confirming the viability of these approaches to the monitoring of cryogenic temperatures along a superconducting transmission line. (C) 2015 Optical Society of America
机译：这一贡献代表了沿着超导电力传输线（低至30 K，距离超过20 m）对低温温度进行分布式和多点光纤监控。使用涂覆有两个不同功能覆盖层（环氧树脂和聚甲基丙烯酸甲酯（PMMA））的布拉格光纤光栅传感器进行多点测量，证明其在300-4.2 K范围内的低温运行。分布式测量利用光学频域反射法分析沿射线的瑞利散射两种具有不同涂层的连接纤维（丙烯酸酯和聚酰亚胺）。集成系统已沿着超导输电线路的20 m长低温恒温器放置，目前正在欧洲核研究组织（CERN）进行测试。已经成功地在空间和时间上测量了从300-30 K的冷却事件，证实了这些方法沿超导传输线监测低温温度的可行性。 （C）2015年美国眼镜学会

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