Theoretical Assessment of Plasma Current Measurement in Tokamaks in Relation with the OTDR Detector Noise

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Authors

Institutes & Expert groups

  • BRNO - University of Technology
  • CEA Cadarache - Commissariat à l'Énergie Atomique
  • Masaryk University - Department of Geological Sciences, Faculty of Science
  • UMons - University of Mons-Hainaut

Documents & links

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.

Details

Original languageEnglish
Title of host publication2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)
PublisherIEEE - Institute of Electrical and Electronics Engineers
Pages1-5
Number of pages5
ISBN (Print)978-1-7281-3403-1
DOIs
Publication statusPublished - 2 Mar 2020
Event2019 - PhotonIcs & Electromagnetics Research Symposium: Spring (PIERS — SPRING) - University of Rome 'La Sapienza', Rome, Italy
Duration: 17 Jun 201920 Jun 2019
http://piers.org/piers2019Rome/

Conference

Conference2019 - PhotonIcs & Electromagnetics Research Symposium
CountryItaly
CityRome
Period2019-06-172019-06-20
Internet address

Keywords

  • ITER, Tokomaks, OTDR detector noise

ID: 6784157