Detail publikace

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

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

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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-birefringent fibre is used as the sensing fibre. We consider the general case of a non-uniform magnetic field distribution along the sensing fibre. The numerical simulations, based on Jones formalism with 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 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.

Anglický abstrakt

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-birefringent fibre is used as the sensing fibre. We consider the general case of a non-uniform magnetic field distribution along the sensing fibre. The numerical simulations, based on Jones formalism with 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 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.

Dokumenty

BibTex


@article{BUT156342,
  author="Rastislav {Motúz} and Willem {Leysen} and Philippe {Moreau} and Andrei {Gusarov} and Petr {Drexler} and Marc {Wuilpart}",
  title="Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks",
  annote="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-birefringent fibre is used as the sensing fibre. We consider the general case of a non-uniform magnetic field distribution along the sensing fibre. The numerical simulations, based on Jones formalism with 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 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.",
  address="OSA Publishing",
  chapter="156342",
  doi="10.1364/AO.58.002795",
  institution="OSA Publishing",
  number="11",
  volume="58",
  year="2019",
  month="april",
  pages="2795--2802",
  publisher="OSA Publishing",
  type="journal article in Web of Science"
}