1. A New Approach to Measure Magnetic Field of High-Temperature Superconducting Coil Based on Magneto-Optical Faraday Effect
- Author
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Kyung-Woo Ryu, Zhuyong Li, Zhiyong Hong, Meng Song, Zhijian Jin, Jie Sheng, Zeming Wu, Junjie Jiang, and Jianwen Zhang
- Subjects
Materials science ,business.industry ,Superconducting magnet ,engineering.material ,Condensed Matter Physics ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,Magnetic field ,symbols.namesake ,Fiber optic sensor ,Electromagnetic coil ,Magnet ,0103 physical sciences ,Faraday effect ,engineering ,symbols ,Optoelectronics ,Hall effect sensor ,Electrical and Electronic Engineering ,010306 general physics ,business ,Electrical steel - Abstract
Magnetic field monitoring devices are essential for studying and operating high-temperature superconducting (HTS) magnets. Apart from conventional Hall sensor, passive optical fiber sensor is also an option for magnetic field monitoring. In this article, we proposed a novel access based on yttrium iron garnet magneto-optic (YM) sensor, which is one kind of optical fiber sensors, to measure magnetic fields generated by an HTS double pancake coil. Moreover, we used a magnetic field bypass tube made of silicon steel material to expand the measurement range of YM sensor. The test results of YM sensor in liquid nitrogen demonstrated that the YM sensor was benchmarked against Hall probe up to 24.7 mT at 77 K. Using a silicon steel tube to shield magnetic field could extend the field measurement range to 37.6 mT. YM sensor could be one of the promising methods for monitoring HTS magnet magnetic field.
- Published
- 2021