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Propagation of laser generated plasmas through inert gases

Published online by Cambridge University Press:  23 December 2009

F. Neri ,
P.M. Ossi  and
S. Trusso
F. Neri
Affiliation:
Dipartimento di Fisica della Materia e Ingegneria Elettronica, Università di Messina, Messina, Italy
P.M. Ossi
Affiliation:
Dipartimento di Energia & Centre for NanoEngineered MAterials and Surfaces, NEMAS, Politecnico di Milano, Milano, Italy
S. Trusso*
Affiliation:
CNR - Istituto per i Processi Chimico-Fisici, sede di Messina, Salita Sperone, Messina, Italy
*
Address correspondence and reprint requests to: S. Trusso, CNR - Istituto per i Processi Chimico-Fisici, sede di Messina, Salita Sperone, C.da Papardo, Faro Superiore, 98158 Messina, Italy. E-mail: trusso@me.cnr.it
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Abstract

A fast photo imaging technique has been used to characterize the expansion dynamics of a laser generated silver plasma propagating through background inert gases (He and Ar) at different pressures. The time evolution of the expanding plasma was investigated in the framework of currently available phenomenological models. Mixed-propagation model gives an accurate description of the initial and late plasma expansion stages in Ar when proper input parameters are taken into account. In He, only the initial quasi-linear expansion and shock wave formation were observed along the space available to plasma motion.

Keywords

Plasma expansionLaser ablationMixed-propagation model
Type
Research Article
Information
Laser and Particle Beams , Volume 28 , Issue 1 , March 2010 , pp. 53 - 59
Copyright
Copyright © Cambridge University Press 2010

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