Plasma diagnostic application of dielectronic satellites to the resonance line of Cr XXIII |
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| Authors: | ML Apicella R Bartiromo F Bombarda R Giannella |
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| Institution: | Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche Energia Frascati, C.P. 65, 00044 Frascati, Rome, Italy |
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| Abstract: | We have measured the spectrum of plasma emission in the Frascati tokamak FT around the resonance line 1s2p → 1s2 of the helium-like ion Cr XXIII. The presence of dielectronic satellites has been detected and their wavelengths determined. The intensity ratio of these satellites to the resonance line has been calculated from the corresponding lines in Fe XXV with a simple extrapolation. Good agreement with experimental points has been obtained in high electron density discharges. Line ratios systematically lower than the predicted values are obtained at low density and this has been related to the presence of a non-thermal population of electrons as indicated also by other diagnostics. |
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