Méthode de mesure de la température électronique à partir du rapport d'intensité de deux raies, dans un plasma hors de l'équilibre thermodynamique

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Abstract
A method for measuring the electron temperature in a high temperature, low density plasma with a coronal distribution for the excited levels is described, based on the intensity ratio of two spectral lines of an alkali-like ion. For this purpose, various formulas for the electron impact excitation cross-sections are presented and discussed. The curves showing the line intensity ratio versus Te have been drawn for the pairs obtained from the following lines : NV 1 238 Å, NV 209 Å and NV 162 A, thereby permitting a measurement of electron temperatures in range from 7 to 70 eV. Some results obtained with this method, for the torus TA 2000 are given