Funding Projects

Current sensor for ITER
Optical fibre sensors for plasma current measurement in the ITER thermonuclear fusion reactor à fusion thermonucléaire ITER

01/01/2019-31/12/2022 - partners
  • Funding agency: FNRS-PDR

  • Coordinator(s):

  • Department Contribution:

  • Administrative responsible(s): M. Wuilpart; M. Mura;

  • Scientific responsible(s): M. Wuilpart; P. Dandu;

  • Summary of the project: This project is related to the context of nuclear fusion reactors based on a tokamak configuration. The ITER project aims to build for 2025 a Tokamak capable of generating a fusion power ten times higher that that used to heat the plasma. The plasma current is a fundamental parameter for the Tokamak monitoring. It is therefore essential to measure it with an accuracy of 1%.The existing current sensors are not suitable for the ITER environment.The objective of this project is to propose a solution to this problem by developing current sensors based on optical fibre technology. Two configurations will be investigated: the conventional configuration consisting in measuring the polarization rotation undergone by the light when the fibre is subject to a magnetic field and a configuration based on polarization sensitive reflectometry. In the first case, the efforts will focus on the quantification of the impact on the sensor performance induced by radiations, temperature effects, bending and twist. In the second case, the study will be mainly dedicated to the development of an algorithm capable of extracting the current value and the magnetic field spatial distribution from the measurement trace provided by the reflectometer. The project also aims to develop modelings and simulation tools for the proposed sensing schemes. These tools will be validated on a dedicated test bench. Finally, the proposed sensors will be tested on the WEST (Tungsten Environment in Steady-state Tokamak) and JET (Joint European Torus) experimental fusion reactors.