The Generation of High Energy Ions by Photo-Induced Dissociation of Atomic Clusters
1999; IOP Publishing; Volume: T80; Issue: A Linguagem: Inglês
10.1238/physica.topical.080a00035
ISSN1402-4896
AutoresR. A. Smith, J. W. G. Tisch, T. Ditmire, Emma Springate, N. Hay, M. B. Mason, E. T. Gumbrell, Andrew Comley, L. C. Mountford, J. P. Marangos, M. H. R. Hutchinson,
Tópico(s)Atomic and Molecular Physics
ResumoThe interaction of an intense laser pulse of sub-picosecond duration with an atomic cluster larger than a few hundred atoms can be extremely energetic. The high local density within the cluster together with a dynamic dielectric resonance in the expanding cluster microplasma greatly enhance coupling of the laser to both ion and electron kinetic energies. In contrast to the few tens of eV temperatures typically produced in laser irradiation of monatomic gases, cluster targets can produce electron energy distributions in the few keV range, mean ion temperatures of 10–50 keV and peak ion kinetic energies up to 1 MeV. In addition, charge states up to 40+ can be produced with quite modest laser intensities (≈ 1016 W cm-2). Cluster targets are also surprisingly efficient (>90%) at absorbing intense laser light, and thus provide a new route to producing very high energy density, highly ionized laboratory plasmas of interest to a broad range of disciplines. Here we review recent experimental results and outline some areas of current research in this new field.
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