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Dynamics of photo-ablated carbon plasma in an inert gas atmosphere

  • T. Kerdja (a1), S. Abdelli (a1), E. H. Amara (a2), D. Ghobrini (a1), M. Si-Bachir (a1) and S. Malek (a1)...


Time and space-resolved emission spectroscopy measurements were performed to investigate plasma dynamics during laser evaporation of a graphite target in an ambient inert atmosphere. Intense molecular emission is found to occur behind a front separating the plasma from the foreign gas. Two stages of expansion are found and are well described, using a viscous drag force model for the first one and a delayed ideal blast wave model for the second. The vibrational temperature estimated using the Swan band in helium at different pressures is presented.



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