Spatially resolved determination of the electronic density and temperature by a visible spectro- tomography diagnostic in a linear magnetized plasma

V.  Gonzalez-Fernandez (1) , P. David (2) , R. Baude (1) , A. Escarguel (1) , Y. Camenen (1)

1 PIIM - Physique des interactions ioniques et moléculaires
2 Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany

In this work, a non-intrusive, spatially resolved, spectro-tomographic optical diagnostic of the electronic density and temperature on the linear plasma column Mistral is presented. Coupling of spectroscopy and tomography technique gives access to the local plasma light emission at different wavelengths (visible and near IR) in an argon plasma. Taking advantage of the symmetry of the Mistral experiment, the diagnostic results are validated and the plasma is found to correspond to a corona equilibrium state. With the use of another spectrometer and a Langmuir probe, we propose a non-intrusive method to determine the electronic density and temperature of each pixel of the tomographic images of the plasma. The obtained results are in good agreement with the Langmuir probe ones.

Mots clés: spectro-tomography; non-intrusive diagnostic; argon plasma; electronic density; electronic temperature

Domaines: Physique des plasmas [physics.plasm-ph]; Optique [physics.optics]

V.  Gonzalez-Fernandez, P. David, R. Baude, A. Escarguel, Y. Camenen. Spatially resolved determination of the electronic density and temperature by a visible spectro- tomography diagnostic in a linear magnetized plasma. Scientific Reports, 2020, 10 (1), ⟨10.1038/s41598-020-62426-9⟩. ⟨hal-02563963⟩