NUKLEONIKA 2012, 57(1):37-41

 


UNCONVENTIONAL PROCEDURE FOR INVERSION OF POLARIMETRIC DATA: NUMERICAL CALCULATION FOR A SIMPLE MODEL
OF TOROIDAL PLASMA



Janusz Chrzanowski1, Yury A. Kravtsov2, Didier Mazon3,4

1 Institute of Physics, Maritime University of Szczecin,
1/2 Wały Chrobrego Str., Szczecin 70-500, Poland

2 Space Research Institute, 82/34 Profsoyuznaya Str., Moscow 117997, Russia
3 Association Euratom-CEA, CEA Cadarache DSM/IRFM,
13108 St. Paul lez Durance Cedex, France

4 JET-EFDA, Culham Science Centre, UK


A gradient method is proposed for inversion of polarimetric data for tokamak plasma. It is assumed that the electron density and the normalized magnetic profile along the ray are known from experiments (scattering and magnetic measurements) in the spirit of the EFIT approach. Under these assumptions the maximum value of the electron density and maximum value of the magnetic field may be estimated by the gradient method. It is shown that with this method it is possible to achieve accuracy of about 0.1% already after 3–4 iterations.


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