TY - JOUR
T1 - Evaluation of explosive sublimation as the mechanism of nanosecond laser ablation of tungsten under vacuum conditions
AU - Oderji, Hassan Yousefi
AU - Farid, Nazar
AU - Sun, Liying
AU - Fu, Cailong
AU - Ding, Hongbin
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - A non-equilibrium mechanism for nanosecond laser ablation is suggested herein, and its predictions are compared to the results of W experiments performed under vacuum conditions. A mechanism of particle formation is explained via this model, with partial sublimation of the superheated irradiated zone of the target considered to be the mechanism of laser ablation. In this study, a mixture of vapor and particles was explosively generated and subsequently prevented the rest of a laser pulse from reaching its intended target. This mechanism was found to play an essential role in the ablation of W under vacuum conditions, and it provides a theoretical justification for particle formation. Moreover, special considerations were taken into account for the expansion of plasma into a vacuum. The model was evaluated by measuring the mass of ablated particles using a quartz crystal deposition monitor and time-resolved optical emission spectroscopy. The results of this model were found to be in good agreement with experimental values.
AB - A non-equilibrium mechanism for nanosecond laser ablation is suggested herein, and its predictions are compared to the results of W experiments performed under vacuum conditions. A mechanism of particle formation is explained via this model, with partial sublimation of the superheated irradiated zone of the target considered to be the mechanism of laser ablation. In this study, a mixture of vapor and particles was explosively generated and subsequently prevented the rest of a laser pulse from reaching its intended target. This mechanism was found to play an essential role in the ablation of W under vacuum conditions, and it provides a theoretical justification for particle formation. Moreover, special considerations were taken into account for the expansion of plasma into a vacuum. The model was evaluated by measuring the mass of ablated particles using a quartz crystal deposition monitor and time-resolved optical emission spectroscopy. The results of this model were found to be in good agreement with experimental values.
KW - ITER
KW - LIBS
KW - Laser ablation mechanism
KW - Laser ablation modeling
KW - Laser-induced breakdown spectroscopy
KW - Tungsten
UR - https://www.scopus.com/pages/publications/84974625310
U2 - 10.1016/j.sab.2016.05.008
DO - 10.1016/j.sab.2016.05.008
M3 - Article
SN - 0584-8547
VL - 122
SP - 1
EP - 8
JO - Spectrochimica Acta - Part B Atomic Spectroscopy
JF - Spectrochimica Acta - Part B Atomic Spectroscopy
ER -
