Modelling of polarimetry measurements at JET

F.P. Orsitto, A. Boboc, C. Mazzotta, E. Giovannozzi, L. Zabeo

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Abstract

This paper presents a study aimed at validating the ability of the presently available models to predict the Cotton-Mouton (C-M) effect. The Faraday rotation and the C-M phase shift angle can be calculated by means of a rigorous numerical solution of Stokes equations. Numerical and approximated solutions are presented and compared with experimental data. A detailed comparison is done with the time traces of measurements, inside a limited dataset representative of JET regimes. A statistical analysis is then carried out on a dataset including data from 300 discharges. In general the C-M measurements are in agreement with the numerical model, and the line integral of plasma density deduced by the C-M measurements is in agreement with that measured by LIDAR Thomson scattering (well inside the experimental error, which is close to two fringes for the polarimetry measurements, 1 fringe = 1.14 × 1019m-2). © 2008 IOP Publishing Ltd.
Original languageEnglish
Article number115009
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume50
Issue number11
DOIs
Publication statusPublished - 1 Nov 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Orsitto, F. P., Boboc, A., Mazzotta, C., Giovannozzi, E., & Zabeo, L. (2008). Modelling of polarimetry measurements at JET. Plasma Physics and Controlled Fusion, 50(11), -. [115009]. https://doi.org/10.1088/0741-3335/50/11/115009