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Stopping power of heavy ions in strongly coupled plasmas

Published online by Cambridge University Press:  09 March 2009

G. Zwicknagel ,
C. Toepffer  and
P.-G. Reinhard
G. Zwicknagel
Affiliation:
Institut für Theoretische Physik II, Universität Erlangen, D-91058 Erlangen, Germany
C. Toepffer
Affiliation:
Institut für Theoretische Physik II, Universität Erlangen, D-91058 Erlangen, Germany
P.-G. Reinhard
Affiliation:
Institut für Theoretische Physik II, Universität Erlangen, D-91058 Erlangen, Germany
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Abstract

We investigate the stopping power of heavy ions in strongly coupled electron plasmas by performing molecular dynamics (MD) computer simulations. A comparison with conventional weak coupling theories shows that these fail in describing the stopping power at low ion velocities and strong coupling. Then nonlinear screening effects become important and this causes a change in the dependence of the stopping power on the ion charge Zp at low ion velocities. From the MD simulation, we find the stopping power to behave like ZP1.43 instead of the weak coupling behavior Zp2 ln(const/Zp). Similar results were recently obtained by experiments in connection with electron cooling at heavy ion storage rings.

Type
Research Article
Information
Laser and Particle Beams , Volume 13 , Issue 2 , June 1995 , pp. 311 - 319
Copyright
Copyright © Cambridge University Press 1995

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