Abstract
Molecular dynamic (MD) computer simulations are used to investigate the stopping of heavy ions in strongly coupled electron plasmas. Our results show, that in this regime collisions between the electrons as well as non-linear screening effects yield at low ion velocities a dependence of the stopping power on the ion chargeZ which scales like Z1.43 instead of the usual Z2 ln(const/Z)-scaling for weak coupling. This is connected with an enhanced local density of electrons around a highly charged, slow ion.
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References
G. Zwicknagel, C. Toepffer and P.-G. Reinhard, Il Nuovo Cimento A106 (1993) 1857.
G. Zwicknagel, C. Toepffer and P.-G. Reinhard, Molecular dynamics simulation of electron cooling, in:Beam Cooling and Related Topics, ed. J. Bosser (CERN, Genf, 1994) pp. 245–248.
G. Zwicknagel, C. Toepffer and P.-G. Reinhard, Laser and Particle Beams 13 (1995) 311.
G. Zwicknagel, Energieverlust schwerer Ionen in stark gekoppelten Plasmen, Ph.D. Thesis, Universität Erlangen (1994).
P. Sigmund, Phys. Rev. A26 (1982) 2497.
L. De Ferrariis and N.R. Arista, Phys. Rev. A29 (1984) 2145.
S. Ichimarui,Basic Principles of Plasma Physics (Benjamin, Reading, MA, 1973).
Th. Peter and J. Meyer-ter-Vehn, Phys. Rev. A43 (1991) 1998.
Y.S. Derbenev and A.N. Skrinsky, Part. Acc. 8 (1977) 1.
A.H. SØrensen and E. Bonderup, Nucl. Instr. Meth. 215 (1983) 27.
H. Poth, Phys.Rep. 196 (1994) 135.
O. Boine-Frankenheim, Nonlinear stopping power of ions in plasmas, Annual Report (1994);High Energy Density in Matter Produced by Heavy Ion Beams (GSI Darmstadt, Darmstadt, 1995) pp. 46–47.
I. Hofmann, What is electron cooling for high Z?, in:Beam Cooling and Related Topics, ed. J. Bosser (CERN, Genf, 1994) pp. 330–335.
J. D'Avanzo, Nonlinear stopping of heavy ions in a strong magnetic field, GSI Scientific Report (1994), (GSI Darmstadt, Darmstadt, 1995) p. 252.
M. Steck et al., Electron cooling of highly charged ions at the ESR, in:Beam Cooling and Related Topics, ed. J. Bosser (CERN, Genf, 1994) pp. 395–399.
A. Wolf et al., Charge dependence of the electron cooling force for heavy ions, in:Beam Cooling and Related Topics, ed. J. Bosser (CERN, Genf, 1994) pp. 416–421.
Th. Winkler et al., Charge dependence of the electron cooling force, GSI Scientific Report (1994), (GSI Darmstadt, Darmstadt, 1995) p. 245, and these proceedings, Hyp. Int. 99 (1996) 277.
O. Uwira et al., Recombination of electrons with U28+ ions in a dense, cold electron target, GSI Scientific Report (1994), (GSI Darmstadt, Darmstadt, 1995) p. 137.
S. Baird et al., to be published in Phys. Lett. B.
U. Schramm et al., these proceedings, Hyp. Int. 99 (1996) 309.
H. Gao et al., these proceedings, Hyp. Int. 99 (1996) 301.
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Supported by the Bundesministerium für Bildung und Forschung (BMBF), the Gesellschaft für Schwerionenforschung Darmstadt (GSI) and the European Community.
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Zwicknagel, G., Toepffer, C. & Reinhard, PG. Molecular dynamic simulations of ions in electron plasmas at strong coupling. Hyperfine Interact 99, 285–291 (1996). https://doi.org/10.1007/BF02274932
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DOI: https://doi.org/10.1007/BF02274932