002947666 001__ 2947666
002947666 003__ SzGeCERN
002947666 005__ 20251101224243.0
002947666 0247_ $$2DOI$$9Elsevier Ltd$$a10.1016/j.optlastec.2025.113767$$qpublication
002947666 0248_ $$aoai:cds.cern.ch:2947666$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002947666 035__ $$9https://inspirehep.net/api/oai2d$$aoai:inspirehep.net:2966162$$d2025-10-31T14:25:24Z$$h2025-11-01T05:00:02Z$$mmarcxml
002947666 035__ $$9Inspire$$a2966162
002947666 041__ $$aeng
002947666 100__ $$aMarcon, Leonardo$$jORCID:0000-0003-0767-5257$$uU. Padua (main)$$uUnlisted, CH$$vCoherent II-VI Laser Enterprise GmbH, Binzstrasse 17, Zürich, 8045, Switzerland
002947666 245__ $$9Elsevier Ltd$$aMonitoring of a high temperature superconducting magnet by means of distributed optical fiber sensing
002947666 260__ $$c2025
002947666 300__ $$a8 p
002947666 520__ $$9Elsevier Ltd$$aDistributed optical fiber sensor is a unique technology that offers unprecedented advantages and performance especially in those experimental fields where the environmental harshness limits the applicability of standard sensors. By measuring the faint light backscattered by the fiber in response to a well-tailored probing signal, distributed sensors allow mapping the variation of physical parameters along the fiber path with high spatial resolution. In this work we report on the application of this technology to the monitoring of a complete mockup prototype of high-temperature superconducting magnet, developed for the future High Luminosity Large Hadron Collider at CERN. Four optical fibers have been embedded in different areas of the magnet and have been measured by optical frequency-domain reflectometry. The magnet was first monitored during the cooling phase from room temperature down to 4.5 K; results show that, despite the huge temperature variation, the structure reacts uniformly, without suffering from localized thermal stress, confirming the design targets. In a second phase, the magnet was monitored while it was powered with electric currents up to 2.5 kA, at the operational temperature of 50 K. In this case results show non-negligible localized strain accumulations due to the Lorentz forces, which are marginally higher than what was expected by design. The experiment confirms the unique advantages that distributed optical fiber sensors offer to both the design and operation control of structures as critical and complex as superconducting magnets.
002947666 540__ $$3publication$$aCC BY-NC-ND 4.0$$uhttp://creativecommons.org/licenses/by-nc-nd/4.0/
002947666 542__ $$3publication$$dThe Authors$$g2025
002947666 65017 $$2SzGeCERN$$aDetectors and Experimental Techniques
002947666 6531_ $$9Author$$aOptical fibers
002947666 6531_ $$9Author$$aSensors
002947666 6531_ $$9Author$$aMagnets
002947666 6531_ $$9Author$$aSuperconductivity
002947666 6531_ $$9Author$$aCryogenic temperature
002947666 690C_ $$aARTICLE
002947666 690C_ $$aCERN
002947666 700__ $$aCastaldo, Bernardo$$uCERN
002947666 700__ $$aChiuchiolo, Antonella$$uCERN$$uINFN, Salerno$$vINFN-Napoli, Gr. Collegato Salerno, Fisciano, 80084, Italy
002947666 700__ $$aVan Nugteren, Jeroen$$jORCID:0000-0001-8072-7725$$uCERN$$uUnlisted, CH$$vLittle Beast Engineering, Zürich, 8045, Switzerland
002947666 700__ $$aBajas, Hugues$$uCERN
002947666 700__ $$aKirby, Glyn$$uCERN
002947666 700__ $$aGaltarossa, Andrea$$uU. Padua (main)
002947666 700__ $$aBajko, Marta$$uCERN
002947666 700__ $$aPalmieri, Luca$$jORCID:0000-0001-7187-570X$$mluca.palmieri@unipd.it$$uU. Padua (main)
002947666 773__ $$c113767$$mpublication$$pOpt. Laser Technol.$$v192$$y2025
002947666 8564_ $$82792454$$s3586724$$uhttps://cds.cern.ch/record/2947666/files/document.pdf$$yFulltext
002947666 960__ $$a13
002947666 980__ $$aARTICLE