Influence d'additifs organiques à faible potentiel d'ionisation sur le fonctionnement des décharges autonomes dans les mélanges CO2-N2-He à la pression atmosphérique

Parametric measurements on a doped CO2TEA laser

“…The results of this measurements are shown in fig. 12 and confirm the well established behaviour of a doped laser [3][4][5]. For high TPA concentrations (solid line) the peak current increases, while the laser voltage at which the discharge takes place decreases.…”

“…It is well known that the performance of a simple wire triggered TEA laser improves drastically when a low ionization seed gas is added to the laser gas mixture [1][2][3]. Some explanations that have been given to this phenomenon are improved photo-ionization [1,2], and a modified electron energy distribution function [3][4][5] causing more optimal pumping and a shift of an attachment dominated discharge towards a more stable recombination dominated discharge. Negative effects have been reported in [3], where a depopulation of the upper laser level by TPA was measured.…”