In this contribution we report the application of time resolved laser induced fluorescence (tr-LIF) experiments on low pressure argon surfatron plasmas to obtain insight in the argon excitation kinetics. In this experimental study we pump two excited levels of the argon system in the 4p and 5p group. Studying the decay time of the fluorescence signal for different plasma conditions in combination with precise Thomson scattering measurements of the electron density, enable us to obtain the rates for the collisional processes that depopulate the levels, namely the heavy particle quenching and the inelastic electron-atom collisions rate. We have measure depopulation rates one order of magnitude larger for the higher excited levels. We have also observed increase of the electron collision rates for lower gas pressures as well as indications of self-absorption of the studied 4p line under low pressure conditions (<1 mbar).
|Title of host publication||Proceedings of the 30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28th- September 2nd, 2011, Belfast, UK|
|Publication status||Published - 2011|
|Event||30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28 - September 2, 2011, Belfast, UK - Belfast, United Kingdom|
Duration: 28 Aug 2011 → 2 Sep 2011
|Conference||30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28 - September 2, 2011, Belfast, UK|
|Abbreviated title||ICPIG 2011|
|Period||28/08/11 → 2/09/11|