I have seen a number of experimental papers where the temperature of a LIBS plasma has been measured at different delay times from the initiating laser pulse.
However, I am seeking a model (or an equation) that describes the evolution of the LIBS plasma temperature with time (after the end of the initiating laser pulse).
Can anyone suggest papers where a LIBS Plasma temperature model/equation has been proposed/described?
Hello Dr Doug Body
These two paper may be helpful to you
1. Appl. Opt. 47 G30 (2008)
2.Laser and Partcle Beam 30 621 (2012)
Hello,
I do not really know about papers where such an equation was published. But this is really an interesting question.
However, it cannot be answered that easily since the function T vs. t strongly depends on the plasma, i.e. the laser parameters (fleunce etc.), the material (solid, liquid etc.), the ambient conditions (pressure, gas etc.) and the ablation regime (phase explosion, LTE or not etc.).
In 2014, we have published a set of data (see Table 3 in [C. Gerhard, J. Hermann, L. Mercadier, L. Loewenthal, E. Axente, C.R. Luculescu, T. Sarnet, M. Sentis, W. Viöl: Quantitative analyses of glass via laser-induced breakdown spectroscopy in argon, Spectrochimica Acta Part B 101 (2014) 32-45, DOI: 10.1016/j.sab.2014.07.014]. I have plotted the values reported there; see the attached graph.
For the given specific experimental conditions described in that paper, the dependency of temperature over time can be estimated by the exponential decay shown in the attached figure…
I think that in most cases, it is an exponential decay as a general approach.
I hope this helps?
Best,
Christoph
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