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Characterization of hydroxyapatite laser ablation plumes by fast intensified CCD-imaging

Published online by Cambridge University Press:  03 March 2011

P. Serra ,
J. Palau ,
M. Varela ,
J. Esteve  and
J.L. Morenza
P. Serra
Affiliation:
Department de Física Aplicada i Electròntca, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
J. Palau
Affiliation:
Department de Física Aplicada i Electròntca, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
M. Varela
Affiliation:
Department de Física Aplicada i Electròntca, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
J. Esteve
Affiliation:
Department de Física Aplicada i Electròntca, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
J.L. Morenza
Affiliation:
Department de Física Aplicada i Electròntca, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
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Abstract

ArF excimer laser pulses (193 nm, 20 ns, 150 mJ) have been focused on a hydroxyapatite (HA) target in similar conditions to those normally used for thin film deposition. Fast intensified CCD images of HA laser ablation plumes have been taken in vacuum and under different water vapor pressures ranging from 0.01 mbar to 1 mbar. Images of HA ablation in vacuum have shown a plume freely expanding at a constant velocity of 2.3 × 106 cm/s. HA ablation under a water vapor pressure of 0.01 mbar has revealed an expansion behavior very similar to that of ablation in vacuum. Images taken under a water vapor pressure of 0.1 mbar have shown the formation of a shock structure in the plume. Finally, HA ablation under a water vapor pressure of 1 mbar has revealed the development of some irregularities in the shape of the plume.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 2 , February 1995 , pp. 473 - 478
Copyright
Copyright © Materials Research Society 1995

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References

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