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Proceedings Paper

Study of a fibre optics current sensor for the measurement of plasma current in ITER
Author(s): Marc Wuilpart; Benoit Vanus; Alina Andrasan; Andrei Gusarov; Philippe Moreau; Patrice Mégret
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Paper Abstract

In this article, we study the feasibility of using a fibre-optics current sensor (FOCS) for the measurement of plasma current in the future fusion reactor ITER. The sensor is based on a classical FOCS interrogator involving the measurement of the state of polarization rotation undergone by the light in presence of a magnetic field (Faraday effect) in an optical fibre surrounding the current and terminated by a Faraday mirror. We considered a uniformly spun optical fibre as the sensing element and we used the Stokes formalism to simulate the sensor. The objective of the simulations is to quantify the ratio LB/SP (beat length over the spun period of the spun fibre) enabling a measurement error in agreement with the ITER specifications. The simulator takes into account the temperature variations undergone by the measurement system under ITER operation. The simulation work showed that a LB/SP ratio of 19.2 is adequate.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160L (30 May 2016); doi: 10.1117/12.2236814
Show Author Affiliations
Marc Wuilpart, Univ. de Mons (Belgium)
Benoit Vanus, Univ. de Mons (Belgium)
Alina Andrasan, Technical Univ. of Cluj-Napoca (Romania)
Andrei Gusarov, SCK CEN (Belgium)
Philippe Moreau, CEA-IRFM (France)
Patrice Mégret, Univ. de Mons (Belgium)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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