Article révisé par les pairs
Résumé : A route toward the experimental characterization of Cool Atmospheric Plasmas (CAPs) is described. It is a step-by-step approach, in which, for each step different experimental techniques are compared with each others. These can be divided in passive and active spectroscopic methods. It is seen that especially the passive methods for the electron temperature determination are very sensitive to the degree of equilibrium departure suggesting that active spectroscopy is preferable. However, one should realize that lasers can easily heat cool plasmas. This is due to the fact that the ionization degree of CAPs is smalls. © 2012 IOP Publishing Ltd and SISSA.