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Validation of a novel fiber optic strain gauge in a cryogenic and high magnetic field environment |
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| Authors: | Scott Baxter,M&rsquo hamed Lakrimi,Adrian M. Thomas,Hugh Blakes,Mengche Looi |
| Affiliation: | a Siemens Plc, Healthcare Sector, MR Magnet Technology, Wharf Road, Eynsham, Witney, Oxon OX29 4BP, UK b The Department of Physics, The University of Bath, Bath BA2 7AY, UK c Accurate Controls Ltd., 25 Cowley Road, Nuffield Industrial Estate, Poole, Dorset BH17 0UJ, UK d OpSens, 2014 Cyrille-Duquet Street, Quebec, Canada G1N 4N6 |
| Abstract: | We report on the first operation of an easy to use low cost novel fiber optic strain gauge (FOSG) in cryogenic and magnetic field environments. The FOSGs were mounted on a superconducting coil and resin impregnated. The gauges detected resin shrinkage upon curing. On cooldown, the FOSG monitored the thermal contraction strains of the coil and the electromagnetic strain during energization. The coil was deliberately quenched, in excess of 175 times, and again the FOSG detected the quenches and measured the thermal expansion-induced strains and subsequent re-cooling of the coil after a quench. Agreement with FEA predictions was very good. |
| Keywords: | C. Stress effects C. Thermal expansion D. Instrumentation D. Optical Techniques E. Superconducting magnetic |
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