Fiber Bragg Grating Sensor for Strain Sensing in Low Temperature Superconducting Magnet

Fiber Bragg grating (FBG) sensor for monitoring the electromagnetic strain in a low temperature superconducting (LTS) magnet was studied. Before used to LTS magnet strain sensing, the strain response of the sensor with 1.54- wavelength at liquid helium was experimentally studied. It was found that t...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2010-06, Vol.20 (3), p.1798-1801
Main Authors: Zhang, Hongjie, Wang, Qiuliang, Wang, Housheng, Song, Shousen, Zhao, Baozhi, Dai, Yinming, Huang, Guojun, Jiang, Zhonghua
Format: Article
Language:English
Subjects:
Applied sciences
Bragg gratings
Capacitive sensors
Circuit properties
Computer simulation
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electromagnets
Electronics
Exact sciences and technology
Fiber Bragg grating
Fiber gratings
Fibers
Finite element method
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
liquid helium temperature
LTS magnet
Magnetic field induced strain
Magnetic sensors
Mathematical models
Monitoring
Optical and optoelectronic circuits
Physics
Sensors
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Strain
Strain measurement
strain sensing
Superconducting magnets
Superconductivity
Temperature sensors
Various equipment and components
Wavelengths
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Description
Summary:Fiber Bragg grating (FBG) sensor for monitoring the electromagnetic strain in a low temperature superconducting (LTS) magnet was studied. Before used to LTS magnet strain sensing, the strain response of the sensor with 1.54- wavelength at liquid helium was experimentally studied. It was found that the wavelength shift showed good linearity with longitudinal applied loads and the strain sensitivity is constant at 4.2 K. And then, the hoop strain measurement of a LTS magnet was carried out on the basis of measured results. Furthermore, the finite element method (FEM) was used to simulate the magnet strain. The difference between the experimental and numerical analysis results is very small.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2042693