The use of an ambient gas is a well-established method employed in pulsed laser deposition (PLD) with nanosecond pulses and has been extensively studied in this context. Most of the existing treatments of the plume expansion are tackled by using complex numerical modeling involving specific target/background gas systems and whose results cannot be straightforwardly extended to a different situation. In the present work, we analyze the propagation dynamics of a silver ablation plume in different background gases. The starting point is the gas-dynamical model of Predtechensky and Mayorov (PM) , which provides a rather clear description of the essential hydrodynamics and can be used for gases of different atomic/molecular mass . We also extend the model to describe the energetic of the plume from the initial stage of expansion to the complete plume halt into the background gas. The observed dynamics and energetics can be helpful for a quantitative description of the plume propagation into the surrounding, low-pressure atmosphere typically employed in PLD, thus allowing identifying the different stages of expansion for any target/background mass system.
|Title of host publication||European Materials Research Society : Spring meeting|
|Publication status||Published - 2009|
|Event||European Materials Research Society: 2009 Spring meeting - Strasbourg, France|
Duration: 8 Jun 2009 → 12 Jun 2009
|Conference||European Materials Research Society|
|Period||08/06/2009 → 12/06/2009|