Open AccessStudy of particle correlation effects on line profiles of Ni-like collisional XUV laser amplifier
Author(s) -
Annette Calisti,
Sergio Ferri,
C. Mossé,
Bernard Talin,
Annie Klisnick,
Limin Meng,
Djamel Benredjem,
Olivier Guilbaud
Publication year - 2012
Publication title -
hal (le centre pour la communication scientifique directe)
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1007/978−3−319−00696−3_2
Subject(s) - extreme ultraviolet , laser , physics , amplifier , line (geometry) , atomic physics , optics , optoelectronics , geometry , mathematics , cmos
International audienceWe discuss the effects of particle correlations on the spectral broadening due to the radiator motion (Doppler broadening) for a Ni-like XUV laser line pumped in two different regimes (transient and quasi-steady state regimes) of collisional excitation. In a medium with gain, radiative transport effects modify the observed profile and these modifications depend on the homogeneous or inhomogeneous nature of the intrinsic profile (be- fore amplification). The intrinsic line profile is usually described by a Voigt profile, which is the convolution of a Lorentzian profile due to the different homogeneous broadenings (electron collision-induced transitions and spon- taneous emission) and an inhomogeneous Gaussian profile due to Doppler shifts (due to the radiator motion in the free-particle limit). In this paper, it is shown that accounting for the correlations between particles modifies no- ticeably the radiator-motion broadened profiles, whatever the densities and temperatures values