Publication result detail

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

MOTÚZ, R.; GESCHEIDTOVÁ, E.; LEYSEN, W.; MOREAU, P.; GUSAROV, A.; DREXLER, P.; WUILPART, M.

Original Title

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

English Title

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

Type

Paper in proceedings (conference paper)

Original Abstract

In this paper, we present a theoretical analysis of the plasma current measurement in tokamak-type fusion reactors using a Polarization Optical Time-Domain Reflectometer (POTDR) setup, where the general case of non-uniform distribution of a magnetic field along the sensing fibre is analyzed. A low birefringent fibre has been considered as the sensing fibre. The numerical simulations were based on the Jones formalism and take into account the OTDR detector noise reflecting the measurement error as a function of the plasma current. The measurement performance was evaluated for an ITER (International Thermonuclear Experimental Reactor)-relevant sensor configuration. Based on the simulation results we demonstrate that for plasma currents in the range of 0 to 1 MA, the signal-to-noise ratio (SNR) of 6 dB, achievable in modern POTDRs, complies with the ITER requirements. Subsequently, the SNR level of 4 dB satisfies the plasma current range of 1 to 20 MA.

English abstract

In this paper, we present a theoretical analysis of the plasma current measurement in tokamak-type fusion reactors using a Polarization Optical Time-Domain Reflectometer (POTDR) setup, where the general case of non-uniform distribution of a magnetic field along the sensing fibre is analyzed. A low birefringent fibre has been considered as the sensing fibre. The numerical simulations were based on the Jones formalism and take into account the OTDR detector noise reflecting the measurement error as a function of the plasma current. The measurement performance was evaluated for an ITER (International Thermonuclear Experimental Reactor)-relevant sensor configuration. Based on the simulation results we demonstrate that for plasma currents in the range of 0 to 1 MA, the signal-to-noise ratio (SNR) of 6 dB, achievable in modern POTDRs, complies with the ITER requirements. Subsequently, the SNR level of 4 dB satisfies the plasma current range of 1 to 20 MA.

Keywords

POTDR, plasma current, ITER, distributed fibre optic current sensor, tokamak

Key words in English

POTDR, plasma current, ITER, distributed fibre optic current sensor, tokamak

Authors

MOTÚZ, R.; GESCHEIDTOVÁ, E.; LEYSEN, W.; MOREAU, P.; GUSAROV, A.; DREXLER, P.; WUILPART, M.

RIV year

2020

Released

01.08.2019

Publisher

IEEE

Location

Rome, Italy

Book

2019 Progress in Electromagnetics Research Symposium (PIERS-Rome)

ISBN

1559-9450

Periodical

Progress In Electromagnetics

State

United States of America

Pages from

1511

Pages to

1515

Pages count

5

URL

https://ieeexplore.ieee.org/document/9017214

BibTex

@inproceedings{BUT158000,
  author="Rastislav {Motúz} and Eva {Gescheidtová} and Willem {Leysen} and Philippe {Moreau} and Andrei {Gusarov} and Petr {Drexler} and Marc {Wuilpart}",
  title="Theoretical assessment of plasma current measurement in tokamaks in relation with the OTDR detector noise",
  booktitle="2019 Progress in Electromagnetics Research Symposium (PIERS-Rome)",
  year="2019",
  journal="Progress In Electromagnetics",
  pages="1511--1515",
  publisher="IEEE",
  address="Rome, Italy",
  doi="10.1109/PIERS-Spring46901.2019.9017214",
  issn="1559-9450",
  url="https://ieeexplore.ieee.org/document/9017214"
}