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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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.

Klíčová slova

plasma current measurement; POTDR; detector noise; Rayleigh backscattering; sensor

Autoři

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

Vydáno

1. 4. 2019

Nakladatel

OSA Publishing

Místo

USA

ISSN

2155-3165

Periodikum

Applied Optics

Ročník

58

Číslo

11

Stát

Spojené státy americké

Strany od

2795

Strany do

2802

Strany počet

8

URL

https://www.osapublishing.org/ao/abstract.cfm?uri=ao-58-11-2795

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",
  journal="Applied Optics",
  year="2019",
  volume="58",
  number="11",
  pages="2795--2802",
  doi="10.1364/AO.58.002795",
  issn="2155-3165",
  url="https://www.osapublishing.org/ao/abstract.cfm?uri=ao-58-11-2795"
}