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International audience; This work presents an electric and kinetic study of homogeneous dielectric barrier discharge (DBD) in pure krypton (Kr). The electrical characterization and kinetic analyses of the DBD in Kr are performed. The plasma formation in DBD, excited by sinusoidal voltage at high pressure, was studied. The discharge development, with homogeneous model approach and using extended kinetic scheme, is simulated. The study is based on a spatial homogeneity model including the plasma chemistry, the electrical circuit and the Boltzmann equations’. The temporal variations of discharge voltage, dielectrics voltage, discharge current, electric field and species concentrations are calculated. The plasma kinetics is discussed with the aim to finding the optimal efficiency. The photon generation, under typical operating conditions, was investigated and discussed. The effect of some parameters on the excilamp like pressure, applied voltage, and frequency are investigated in order to identify the optimal parameters for maximum luminous efficiency in the UV range.

International audience; We discuss new features of the XeCl*-laser kinetics by using a detailed analysis of the results of complex computer models. In particular, we consider the development of a high scale instability in a XeCl*-laser discharge. The emphasis is made on fundamental problems, mainly on the limitation of the macroscopic approach to the study of such strongly nonequilibrium systems. The results obtained indicate especially the discharge proprieties at the plasma centre.