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Mono-energetic ions from collisionless expansion of spherical multi-species clusters

Published online by Cambridge University Press:  22 April 2009

K.I. Popov ,
V.Yu. Bychenkov ,
W. Rozmus ,
V.F. Kovalev  and
R.D. Sydora
K.I. Popov*
Affiliation:
Theoretical Physics Institute, University of Alberta, Edmonton T6G 2G7, Alberta, Canada
V.Yu. Bychenkov
Affiliation:
Theoretical Physics Institute, University of Alberta, Edmonton T6G 2G7, Alberta, Canada P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991, Russia
W. Rozmus
Affiliation:
Theoretical Physics Institute, University of Alberta, Edmonton T6G 2G7, Alberta, Canada
V.F. Kovalev
Affiliation:
Institute for Mathematical Modelling, Moscow, Russian Academy of Sciences, Moscow, Russia
R.D. Sydora
Affiliation:
Theoretical Physics Institute, University of Alberta, Edmonton T6G 2G7, Alberta, Canada
*
Address correspondence and reprint requests to: K.I. Popov, Theoretical Physics Institute, University of Alberta, Edmonton T6G 2G7, Alberta, Canada. E-mail: kpopov@phys.ualberta.ca
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Abstract

Kinetic collisionless expansion of a spherical cluster composed of light and heavy cold ions and hot electrons is studied for arbitrary electron temperature. A wide set of regimes of plasma expansion, from nearly quasi-neutral to Coulomb explosion, is described from a unified description. The time evolution of the velocity, density, and energy spectra for accelerated ions is studied. The study demonstrates that an optimum light ion concentration from few percent to few tens percent, depending on the electron temperature, leads to a quasi-monoenergetic spectra with numbers as high as 70–80% of the total number of light ions.

Keywords

Charge separation-drivenCoulomb explosionExpansionIon accelerationMono-energetic ionsMulti-species cluster expansion
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 2 , June 2009 , pp. 321 - 326
Copyright
Copyright © Cambridge University Press 2009

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