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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
Type
conference paper
Language
English
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.
Keywords
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.
Released
1. 8. 2019
Publisher
IEEE
Location
Rome, Italy
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" }