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Fiber Optic Sensors for Cryogenic Environments

Explore the benefits of fiber optic sensors in demanding environments, including cryogenic and radiation settings. Learn about various sensor types and their applications in projects like CERN, ITER, and nuclear power plants.

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Fiber Optic Sensors for Cryogenic Environments

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  1. Structural sensors for use in cryogenic environmentsDaniele Inaudi, CTO

  2. SMARTEC SA • Part of Roctest Group / Nova Metrix • World’s largest supplier of structural health monitoring systems • World’s largest supplier of fiber optic sensors • Offices in Canada, US, Switzerland, UK, France • Supply of sensing HW and SW components, SHM systems and associated services • Experience in sensing for cryogenic and radiation environments: CERN, ITER, instrumentation of superconductive magnets, LNG tanks and pipelines, nuclear power plants, nuclear waste disposal

  3. Fiber optic Sensors: Why? • Small size • Great variety in the measurable parameters • Distributed and Multiplexed topologies • Insensitive to external perturbations • Reliability in demanding environments • Long-distance remote monitoring • Compatible with data-transmission network

  4. Fiber Optic Sensor Types Point Sensor: Sensoptic (Fabry-Pérot) Quasi distributed (multiplexed): MuST (FBG) Long base: SOFO Distributed: DiTest / DiTemp (Brillouin and Raman)

  5. Temp. [°C] Position [m] F F Strain [me] Position [m] Distributed Sensing Reading Unit T1 Distributed Sensor 0m T2 1m 100m T1 1000m e T2 e 20km

  6. ITER projects • Qualification and production of fiber-optic sensors for the monitoring of superconductive magnets: • Strain • Small displacement (contact) • Large displacement (contact) • Laser-distance-meters: contactless displacement • Point temperatures • Distributed temperatures

  7. Fabry – Perot FO sensor for ITER

  8. FBG FO sensors for ITER

  9. Qualification for cryogenic conditions Strain and Displacement sensors welded on test support during test at nytrogen temperature

  10. Non-contact: Laser Distance Meter

  11. Distributed T Testing

  12. Thank you for your attention Thank you for your attention For more information www.roctest-group.com daniele.inaudi@smartec.ch

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