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Charge-exchange collisions in interpenetrating laser-produced magnesium plasmas

Published online by Cambridge University Press:  30 July 2001

S.S. HARILAL ,
C.V. BINDHU ,
V.P. SHEVELKO  and
H.-J. KUNZE
S.S. HARILAL
Affiliation:
Institut fuer Experimentalphysik V, Ruhr-Universitaet Bochum, Universitaetsstrasse 150, D-44780 Bochum, Germany
C.V. BINDHU
Affiliation:
Institut fuer Experimentalphysik V, Ruhr-Universitaet Bochum, Universitaetsstrasse 150, D-44780 Bochum, Germany
V.P. SHEVELKO
Affiliation:
P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 117924, Russia
H.-J. KUNZE
Affiliation:
Institut fuer Experimentalphysik V, Ruhr-Universitaet Bochum, Universitaetsstrasse 150, D-44780 Bochum, Germany
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Abstract

Charge-exchange collisions are one of the effective pumping methods for soft X-ray lasers. Experiments are performed to investigate charge-exchange collisions between highly charged Mg ions in colliding laser-produced magnesium plasmas. Pinhole photography and XUV spectroscopy are used as diagnostic tools. Spectroscopic studies show selective population of n = 3 levels of Mg IX ions, which results in enhancement of respective line intensities. Theoretical calculations also give a large cross section as high as 10−15 cm2 for these charge-exchange collisions when the relative velocities of the colliding ions are of the order of 107 cm s−1. XUV pinhole pictures are taken in early stages, which give more insight into the expansion dynamics of the colliding magnesium plasmas.

Type
Research Article
Information
Laser and Particle Beams , Volume 19 , Issue 1 , January 2001 , pp. 99 - 103
Copyright
© 2001 Cambridge University Press

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