publication . Article . 2015

Cryogenic-temperature profiling of high-power superconducting lines using local and distributed optical-fiber sensors

Chiuchiolo, Antonella; Palmieri, Luca; Consales, Marco; Giordano, Michele; Borriello, Anna; Bajas, Hugues; Galtarossa, Andrea; Bajko, Marta; Cusano, Andrea;
Open Access
  • Published: 21 Sep 2015 Journal: Optics Letters, volume 40, page 4,424 (issn: 0146-9592, eissn: 1539-4794, Copyright policy)
  • Publisher: The Optical Society
Abstract
This contribution presents distributed and multipoint fiber-optic monitoring of cryogenic temperatures along a superconducting power transmission line down to 30 K and over 20 m distance. Multipoint measurements were conducted using fiber Bragg gratings sensors coated with two different functional overlays (epoxy and poly methyl methacrylate (PMMA)) demonstrating cryogenic operation in the range 300–4.2 K. Distributed measurements exploited optical frequency-domain reflectometry to analyze the Rayleigh scattering along two concatenated fibers with different coatings (acrylate and polyimide). The integrated system has been placed along the 20 m long cryostat of a...
Subjects
free text keywords: Accelerators and Storage Rings, HiRadMat@SPS and MagNet@CERN [9], MagNet@CERN [9.2], Optoelectronics, business.industry, business, Optics, Fiber Bragg grating, Optical fiber, law.invention, law, Fiber optic sensor, Physics, Cryostat, Reflectometry, Transmission line, Power transmission, Rayleigh scattering, symbols.namesake, symbols
Funded by
EC| EUCARD-2
Project
EUCARD-2
Enhanced European Coordination for Accelerator Research & Development
  • Funder: European Commission (EC)
  • Project Code: 312453
  • Funding stream: FP7 | SP4 | INFRA
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