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Diagnostics of inhomogeneous plasmas: correction coefficients of the self-absorption and of the effect of spatial inhomogeneity

Published online by Cambridge University Press:  06 April 2016

Hssaïne Amamou ,
Alexandre Escarguel  and
Belkacem Ferhat
Hssaïne Amamou*
Affiliation:
Laboratoire PROTEE – ISO Université du Sud Toulon-Var, BP 20132, 83957 La Garde CEDEX, France
Alexandre Escarguel
Affiliation:
Laboratoire de Physique des Interactions Ioniques et Moléculaire PIIM, Université d’Aix-Marseille Campus St Jérôme, Marseille, France
Belkacem Ferhat
Affiliation:
Laboratoire d’Electronique Quantique LEQ, Faculté de Physique, U.S.T.H.B, BP 32 El Alia, 16111, Alger, Algérie
*
†Email address for correspondence: [email protected]
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Abstract

A plasma spatial distribution model for a cylindrical geometry was developed to study the dependence of the spectral lines in the plasma emission spectra on plasma inhomogeneity and on the self-absorption effect. In this work, we consider a particular spatial distribution of a plasma. This distribution has allowed us to establish new correction coefficients of spectral lines on the self-absorption effect and to consider the media inhomogeneity effect. These coefficients are then used to analyse experimental spectral lines of emission of a single laser breakdown in an underwater medium. A spatial and time resolved spectroscopic method was used to study the spectrum. For the electron temperature and electron density measurements, trace impurities of Ca and K are added to the water.

Type
Research Article
Information
Journal of Plasma Physics , Volume 82 , Issue 2 , April 2016 , 905820209
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Copyright
© Cambridge University Press 2016 

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