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Fiber optic sensors integration in magnets and in test facilities

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Presentation on theme: "Fiber optic sensors integration in magnets and in test facilities"— Presentation transcript:

1 Fiber optic sensors integration in magnets and in test facilities
Antonella Chiuchiolo (TE-MSC-TF)

2 Antonella Chiuchiolo TE - MSC - TF
Outline Fiber Optic Sensors (FOS) integration in the test facility Example of magnets equipped with FOS Example of FOS configuration Antonella Chiuchiolo TE - MSC - TF

3 Fiber integration in the test facility SM18
Sensors procurement Single Mode fiber Commercial sensors for temperature and strain monitoring Customized sensors layout Data Acquisition System Optical Interrogators: sm125, sm130 and Hyperion modules and Enlight software From 4 to 16 channels , 2 Hz - 1 KHz, 90 – 160 nm Connections and feedthrough Fusion Splice Machine for fiber reparation Optical connectors, feedthrough, cable extentions to equip the test facility Antonella Chiuchiolo TE - MSC - TF

4 Fiber integration in the test facility SM18
Vertical cryostat for testing magnets down to 4.2 K and 1.9 K: Liquid and Superfluid Helium Horizontal cryostat for HTS cable of 20 to 60 meter length: Helium Gas cooling For magnet cold powering up to 30 kA Horizontal benches RF test area Visitors Cryogenics Vertical cryostats SC - Link Cluster D Fiber Lab Cryogen free cryostat for testing FOS with 4.2 K Pulse Tube Refrigerator Vertical cryostat for testing mechanical properties of large magnet structures down to 77 K: Liquid Nitrogen Antonella Chiuchiolo TE - MSC - TF

5 Example MQXFS 5 installation on the insert
Lambda plate Fischer connectors: 4 fibers each connector MQXFS 5 MQXFS 5 connection to the facility Antonella Chiuchiolo TE - MSC - TF

6 Integration in the magnets
Embedding in the impregnated Racetrack model coils Gluing on the Al structure Gluing on the Al structure and on the Ti pole Aluminum structure Iron yoke Coil pack Instrumentation plate SMC RMC MQXFS Antonella Chiuchiolo TE - MSC - TF

7 Integration in the magnets
Embedding in the impregnated Racetrack model coils Gluing on the Al structure Gluing on the Al structure and on the Ti pole FBG transverse direction (Ti Pole) FBG axial direction (Nb3Sn winding) Strain Gauges FBGs azimuthal direction axial direction Instrumentation plate FBG axial direction (Ti Pole) FBG azimuthal direction (Ti Pole) Strain and Temperature Strain Strain SMC RMC MQXFS Antonella Chiuchiolo TE - MSC - TF

8 Fiber optic sensors configuration
(9 µm) (125 µm) ( µm) (1-3 mm) Optical Interrogator Cladding Core Broadband light Fiber Bragg Grating sensor Multiple sensing points along a single fiber Antonella Chiuchiolo TE - MSC - TF

9 Fiber optic sensors configuration
22 FBG sensors on 4 channels Antonella Chiuchiolo TE - MSC - TF

10 Thank you for you attention

11 Antonella Chiuchiolo TE - MSC - TF
Backup slides Antonella Chiuchiolo TE - MSC - TF

12 Antonella Chiuchiolo TE - MSC - TF
Fiber Bragg Grating working principle Longitudinal periodic variation of the refractive index in the optical fiber core Strain and Temperature sensitive: DlB (T, e) Cladding Core Broadband light : photo elastic coefficient : thermo-optic coefficient : thermal expansion coefficient lB: Bragg Wavelength neff : effective refractive index of the core L : grating period Antonella Chiuchiolo TE - MSC - TF

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