A spectral line shape analysis of motional stark effect spectra

L. Godbert-Mouret (1) , M. Koubiti (1) , Yannick Marandet (1) , J. Rosato (1) , F. Rosmej (1) , R. Stamm (1) , P. Lotte (2) , C. Fenzi (2) , H. Capes (2) , L. Bureyeva (3) , V. Lisitsa (4)

1 PIIM - Physique des interactions ioniques et moléculaires
2 DRFC - Département de Recherche sur la Fusion Contrôlée
3 Institute of Spectroscopy of the RAS
4 NRC KI - National Research Center "Kurchatov Institute"

Recent observations of MSE spectra carried out on Tore-Supra show discrepancies between experimental and theoretical intensities calculated at equilibrium. We present here a kinetic model, based on the selectivity of excitation cross sections of Stark states in the parabolic basis. Redistribution due to ion-atom collisions among Stark states of level n=3 allow to calculate the population of Stark states. This model permits to improve significantly the agreement between measured and calculated MSE spectra.

Mots clés: Motional Stark Effect; Non equilibrium populations

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

L. Godbert-Mouret, M. Koubiti, Yannick Marandet, J. Rosato, F. Rosmej, et al.. A spectral line shape analysis of motional stark effect spectra. 2004. ⟨hal-00001739v2⟩