Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation
To achieve optimal operation of the polarimetry-based FOCS, the light polarisation state at the input of the sensing fibre part must be close to a linear one. In the case of a FOCS deployed on a tokamak, the Joint European Torus (JET) in the present work, the long fibre optics link between the laser...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/2/555 |
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| author | Andrei Gusarov Perry Beaumont Paula Siren JET Contributors |
| author_facet | Andrei Gusarov Perry Beaumont Paula Siren JET Contributors |
| author_sort | Andrei Gusarov |
| collection | DOAJ |
| description | To achieve optimal operation of the polarimetry-based FOCS, the light polarisation state at the input of the sensing fibre part must be close to a linear one. In the case of a FOCS deployed on a tokamak, the Joint European Torus (JET) in the present work, the long fibre optics link between the laser source and the sensing fibre modifies the polarisation in an unpredictable way, making it unclear which source polarisation state is to be set. A method for performing the necessary polarisation adjustment in a systematic way is proposed based on the FOCS analysis. The method requires performing data acquisition at two different input polarisations. Based on these measurements, the optimal laser source polarisation can be found. The method was experimentally verified using laboratory set-up and then successfully demonstrated with the FOCS installed at JET. |
| first_indexed | 2024-03-08T09:46:31Z |
| format | Article |
| id | doaj.art-59285d6f54ab4e05a145ea12b46b32d8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-08T09:46:31Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-59285d6f54ab4e05a145ea12b46b32d82024-01-29T14:16:19ZengMDPI AGSensors1424-82202024-01-0124255510.3390/s24020555Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation OptimisationAndrei Gusarov0Perry Beaumont1Paula Siren2JET ContributorsSCK CEN Belgian Nuclear Research Centre, 2400 Mol, BelgiumThe Joint European Torus (JET), Culham Centre for Fusion Energy (CCFE), Culham Science Centre, Abingdon OX14 3EB, UKThe Joint European Torus (JET), Culham Centre for Fusion Energy (CCFE), Culham Science Centre, Abingdon OX14 3EB, UKTo achieve optimal operation of the polarimetry-based FOCS, the light polarisation state at the input of the sensing fibre part must be close to a linear one. In the case of a FOCS deployed on a tokamak, the Joint European Torus (JET) in the present work, the long fibre optics link between the laser source and the sensing fibre modifies the polarisation in an unpredictable way, making it unclear which source polarisation state is to be set. A method for performing the necessary polarisation adjustment in a systematic way is proposed based on the FOCS analysis. The method requires performing data acquisition at two different input polarisations. Based on these measurements, the optimal laser source polarisation can be found. The method was experimentally verified using laboratory set-up and then successfully demonstrated with the FOCS installed at JET.https://www.mdpi.com/1424-8220/24/2/555fibre optics current sensor (FOCS)polarimetrypolarisation adjustmentplasma currenttokamakjoint European torus (JET) |
| spellingShingle | Andrei Gusarov Perry Beaumont Paula Siren JET Contributors Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation Sensors fibre optics current sensor (FOCS) polarimetry polarisation adjustment plasma current tokamak joint European torus (JET) |
| title | Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation |
| title_full | Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation |
| title_fullStr | Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation |
| title_full_unstemmed | Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation |
| title_short | Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation |
| title_sort | performance enhancement of the polarimetric fibre optical current sensor at jet using polarisation optimisation |
| topic | fibre optics current sensor (FOCS) polarimetry polarisation adjustment plasma current tokamak joint European torus (JET) |
| url | https://www.mdpi.com/1424-8220/24/2/555 |
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