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

Published online by Cambridge University Press:  16 October 2009

T. Kerdja ,
S. Abdelli ,
E. H. Amara ,
D. Ghobrini ,
M. Si-Bachir  and
S. Malek
T. Kerdja
Affiliation:
Laboratoire d'Interaction Laser-Matière, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
S. Abdelli
Affiliation:
Laboratoire d'Interaction Laser-Matière, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
E. H. Amara
Affiliation:
Laboratoire des Lasers et Applications, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
D. Ghobrini
Affiliation:
Laboratoire d'Interaction Laser-Matière, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
M. Si-Bachir
Affiliation:
Laboratoire d'Interaction Laser-Matière, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
S. Malek
Affiliation:
Laboratoire d'Interaction Laser-Matière, Centre de Développement des Téchnologie Avancées, 128, chemin Mohamed Gacem, El-Madania, Alger, Algèrie
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Abstract

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.

Type
Research Article
Information
Laser and Particle Beams , Volume 16 , Issue 1: Special Issue: 24th ECLIM , March 1998 , pp. 31 - 38
Copyright
Copyright © Cambridge University Press 1998

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