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Study on Coulomb explosions of ion mixtures

Published online by Cambridge University Press:  22 February 2016

E. Boella ,
B. Peiretti Paradisi ,
A. D’Angola ,
L. O. Silva  and
G. Coppa
E. Boella*
Affiliation:
GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1, 1049-001 Lisbon, Portugal
B. Peiretti Paradisi
Affiliation:
Dipartimento Energia, Politecnico di Torino, corso Duca degli Abruzzi, 24, 10129 Torino, Italy
A. D’Angola
Affiliation:
Scuola di Ingegneria, Università della Basilicata, via dell’Ateneo Lucano, 10, 85100 Potenza, Italy
L. O. Silva
Affiliation:
GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1, 1049-001 Lisbon, Portugal
G. Coppa
Affiliation:
Dipartimento Energia, Politecnico di Torino, corso Duca degli Abruzzi, 24, 10129 Torino, Italy
*
†Email address for correspondence: elisabetta.boella@ist.utl.pt
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Abstract

The paper presents a theoretical work on the dynamics of Coulomb explosion for spherical nanoplasmas composed by two different ion species. Particular attention has been dedicated to study the energy spectra of the ions with the larger charge-to-mass ratio. The connection between the formation of shock shells and the energy spread of the ions has been the object of a detailed analysis, showing that under particular conditions the width of the asymptotic energy spectrum tends to become very narrow, which leads to a multi-valued ion phase space. The conditions to generate a quasi-monoenergetic ion spectrum have been rigorously demonstrated and verified by numerical simulations using a technique that, exploiting the spherical symmetry of the problem, allows one to obtain very accurate and precise results.

Type
Research Article
Information
Journal of Plasma Physics , Volume 82 , Issue 1 , February 2016 , 905820110
Copyright
© Cambridge University Press 2016 

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