https://doi.org/10.1140/epjd/s10053-021-00109-4
Regular Article - Plasma Physics
A spectroscopical study of H
emission in a simply magnetized toroidal plasma
1
Dipartimento di Fisica G.Occhialini, Università degli Studi di Milano-Bicocca, Piazza delle Scienza 3, I-20126, Milano, Italy
2
Department of Physics, Faculty of Science, University of Guilan, P.O. Box 41335-1914, Rasht, Iran
Received:
8
August
2020
Accepted:
8
December
2020
Published online:
16
March
2021
A noninvasive diagnostic technique relying on optical emission spectroscopy is used for studying plasma confined in a purely toroidal magnetic field. Visible emission lines of molecular hydrogen were specifically targeted. Bi-dimensional structures and poloidal plasma profiles were reconstructed from the emissivity distribution of hydrogen Fulcher system using a tomographic method. A few details concerning the methods employed to capture different emission viewlines, data reduction and tomographic reconstruction techniques are also addressed. We report also the first measurement of the excitation temperature of the 
[3c] level in the center of the plasma column, 
eV.
© The Author(s) 2021
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