Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup

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Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup. / Dandu, Prasadaraju; Goussarov, Andrei; Moreau, Philippe; Leysen, Willem; Bostyn, Charlotte; Mégret, Patrice; Wuilpart, Marc.

In: Fusion Engineering & Design, Vol. 166, 112279, 13.11.2020, p. 1-8.

Research output: Contribution to journalArticle

Harvard

Dandu, P, Goussarov, A, Moreau, P, Leysen, W, Bostyn, C, Mégret, P & Wuilpart, M 2020, 'Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup', Fusion Engineering & Design, vol. 166, 112279, pp. 1-8. https://doi.org/10.1016/j.fusengdes.2021.112279

APA

Dandu, P., Goussarov, A., Moreau, P., Leysen, W., Bostyn, C., Mégret, P., & Wuilpart, M. (2020). Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup. Fusion Engineering & Design, 166, 1-8. [112279]. https://doi.org/10.1016/j.fusengdes.2021.112279

Vancouver

Author

Dandu, Prasadaraju ; Goussarov, Andrei ; Moreau, Philippe ; Leysen, Willem ; Bostyn, Charlotte ; Mégret, Patrice ; Wuilpart, Marc. / Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup. In: Fusion Engineering & Design. 2020 ; Vol. 166. pp. 1-8.

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@article{ed4460d4701747aab3e64288e7bf982c,
title = "Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup",
abstract = "Accurate plasma current measurement is mandatory for the safe operation of the ITER. We investigate the possibility of performing this task using the polarisation-OTDR (optical time domain reflectometry). With this approach, an optical fibre placed on the outer surface of the vacuum vessel (VV) is used to measure the plasma current by analysing the Faraday effect induced SOP (state of polarisation) rotation of the backscattered light. The measurement accuracy depends on the extra linear birefringence resulting from the fibre bending related to the placement of the fibre on the vessel. In the present work, we assess this effect. Considering the difficulty in imitating such a bending geometry together with relevant currents in a lab environment, a simulation-based approach is developed to quantify the bending effect in the context of the ITER VV. The effect of fibre bending on the plasma current measurement accuracy in the expected ITER operating current range (0–17 MA) is analysed for different spun periods (SP) and beat lengths (LB) of the spun fibre placed around the VV. It is shown that a proper choice of LB and SP can alleviate the bending effect and achieve the ITER specifications regarding plasma current measurement accuracy.",
keywords = "Plasma diagnostics, Polarisarion-OTDR, Faraday effect, Bending, Optical fibre current sensor",
author = "Prasadaraju Dandu and Andrei Goussarov and Philippe Moreau and Willem Leysen and Charlotte Bostyn and Patrice M{\'e}gret and Marc Wuilpart",
note = "Score=10",
year = "2020",
month = "11",
day = "13",
doi = "10.1016/j.fusengdes.2021.112279",
language = "English",
volume = "166",
pages = "1--8",
journal = "Fusion Engineering & Design",
issn = "0920-3796",
publisher = "Elsevier",

}

RIS - Download

TY - JOUR

T1 - Effect of optical fibre bending on plasma current measurement in ITER using a polarisation-OTDR setup

AU - Dandu, Prasadaraju

AU - Goussarov, Andrei

AU - Moreau, Philippe

AU - Leysen, Willem

AU - Bostyn, Charlotte

AU - Mégret, Patrice

AU - Wuilpart, Marc

N1 - Score=10

PY - 2020/11/13

Y1 - 2020/11/13

N2 - Accurate plasma current measurement is mandatory for the safe operation of the ITER. We investigate the possibility of performing this task using the polarisation-OTDR (optical time domain reflectometry). With this approach, an optical fibre placed on the outer surface of the vacuum vessel (VV) is used to measure the plasma current by analysing the Faraday effect induced SOP (state of polarisation) rotation of the backscattered light. The measurement accuracy depends on the extra linear birefringence resulting from the fibre bending related to the placement of the fibre on the vessel. In the present work, we assess this effect. Considering the difficulty in imitating such a bending geometry together with relevant currents in a lab environment, a simulation-based approach is developed to quantify the bending effect in the context of the ITER VV. The effect of fibre bending on the plasma current measurement accuracy in the expected ITER operating current range (0–17 MA) is analysed for different spun periods (SP) and beat lengths (LB) of the spun fibre placed around the VV. It is shown that a proper choice of LB and SP can alleviate the bending effect and achieve the ITER specifications regarding plasma current measurement accuracy.

AB - Accurate plasma current measurement is mandatory for the safe operation of the ITER. We investigate the possibility of performing this task using the polarisation-OTDR (optical time domain reflectometry). With this approach, an optical fibre placed on the outer surface of the vacuum vessel (VV) is used to measure the plasma current by analysing the Faraday effect induced SOP (state of polarisation) rotation of the backscattered light. The measurement accuracy depends on the extra linear birefringence resulting from the fibre bending related to the placement of the fibre on the vessel. In the present work, we assess this effect. Considering the difficulty in imitating such a bending geometry together with relevant currents in a lab environment, a simulation-based approach is developed to quantify the bending effect in the context of the ITER VV. The effect of fibre bending on the plasma current measurement accuracy in the expected ITER operating current range (0–17 MA) is analysed for different spun periods (SP) and beat lengths (LB) of the spun fibre placed around the VV. It is shown that a proper choice of LB and SP can alleviate the bending effect and achieve the ITER specifications regarding plasma current measurement accuracy.

KW - Plasma diagnostics

KW - Polarisarion-OTDR

KW - Faraday effect

KW - Bending

KW - Optical fibre current sensor

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/42250954

U2 - 10.1016/j.fusengdes.2021.112279

DO - 10.1016/j.fusengdes.2021.112279

M3 - Article

VL - 166

SP - 1

EP - 8

JO - Fusion Engineering & Design

JF - Fusion Engineering & Design

SN - 0920-3796

M1 - 112279

ER -

ID: 7038353