Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks

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Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks. / Motuz, Ratislav; Leysen, Willem; Moreau, Philippe; Goussarov, Andrei; Drexler, Petr; Wuilpart, Marc.

In: Applied Optics, Vol. 58, No. 11, 10.04.2019, p. 2795-2802.

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Motuz, R, Leysen, W, Moreau, P, Goussarov, A, Drexler, P & Wuilpart, M 2019, 'Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks', Applied Optics, vol. 58, no. 11, pp. 2795-2802. https://doi.org/10.1364/AO.58.002795

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Motuz, Ratislav ; Leysen, Willem ; Moreau, Philippe ; Goussarov, Andrei ; Drexler, Petr ; Wuilpart, Marc. / Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks. In: Applied Optics. 2019 ; Vol. 58, No. 11. pp. 2795-2802.

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@article{4323cd2b3e344e3d95e8628b6ecae8c2,
title = "Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks",
abstract = "In this paper, we propose a theoretical study dedicated to the assessment of plasma current measurement in magnetic confinement fusion reactors using a polarization optical time-domain reflectometer (POTDR) setup with a low-birefringence fiber used as the sensing fiber. We consider the general case of a non-uniform magnetic-field distribution along the sensing fiber. The numerical simulations, based on Jones formalism taking into account the OTDR noise, provide the measurement error as a function of the plasma current. The measurement performance is evaluated for an ITER-relevant sensor configuration. We demonstrate that a signal-to-noise ratio of 6 dB, achievable in modern POTDRs, allows us to comply with the ITER requirements for plasma currents from 0 to 1 MA, while for the 1 to 20 MA range, the level is relaxed to 4 dB.",
keywords = "OTDR, Tokamaks",
author = "Ratislav Motuz and Willem Leysen and Philippe Moreau and Andrei Goussarov and Petr Drexler and Marc Wuilpart",
note = "Score=10",
year = "2019",
month = "4",
day = "10",
doi = "10.1364/AO.58.002795",
language = "English",
volume = "58",
pages = "2795--2802",
journal = "Applied Optics",
issn = "0003-6935",
number = "11",

}

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TY - JOUR

T1 - Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks

AU - Motuz, Ratislav

AU - Leysen, Willem

AU - Moreau, Philippe

AU - Goussarov, Andrei

AU - Drexler, Petr

AU - Wuilpart, Marc

N1 - Score=10

PY - 2019/4/10

Y1 - 2019/4/10

N2 - In this paper, we propose a theoretical study dedicated to the assessment of plasma current measurement in magnetic confinement fusion reactors using a polarization optical time-domain reflectometer (POTDR) setup with a low-birefringence fiber used as the sensing fiber. We consider the general case of a non-uniform magnetic-field distribution along the sensing fiber. The numerical simulations, based on Jones formalism taking into account the OTDR noise, provide the measurement error as a function of the plasma current. The measurement performance is evaluated for an ITER-relevant sensor configuration. We demonstrate that a signal-to-noise ratio of 6 dB, achievable in modern POTDRs, allows us to comply with the ITER requirements for plasma currents from 0 to 1 MA, while for the 1 to 20 MA range, the level is relaxed to 4 dB.

AB - In this paper, we propose a theoretical study dedicated to the assessment of plasma current measurement in magnetic confinement fusion reactors using a polarization optical time-domain reflectometer (POTDR) setup with a low-birefringence fiber used as the sensing fiber. We consider the general case of a non-uniform magnetic-field distribution along the sensing fiber. The numerical simulations, based on Jones formalism taking into account the OTDR noise, provide the measurement error as a function of the plasma current. The measurement performance is evaluated for an ITER-relevant sensor configuration. We demonstrate that a signal-to-noise ratio of 6 dB, achievable in modern POTDRs, allows us to comply with the ITER requirements for plasma currents from 0 to 1 MA, while for the 1 to 20 MA range, the level is relaxed to 4 dB.

KW - OTDR

KW - Tokamaks

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/37612724

U2 - 10.1364/AO.58.002795

DO - 10.1364/AO.58.002795

M3 - Article

VL - 58

SP - 2795

EP - 2802

JO - Applied Optics

JF - Applied Optics

SN - 0003-6935

IS - 11

ER -

ID: 6743564