Laser-cluster interaction: x-ray production by short laser pulses |
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Authors: | Deiss Cornelia Rohringer Nina Burgdörfer Joachim Lamour Emily Prigent Christophe Rozet Jean-Pierre Vernhet Dominique |
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Affiliation: | Institute for Theoretical Physics, Vienna University of Technology, A-1040 Vienna, Austria, EU. cornelia@concord.itp.tuwien.ac.at |
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Abstract: | We investigate the heating of the quasifree electrons in large rare-gas clusters (N exceeding 10(5) atoms) by short laser pulses at moderate intensities (I approximately = 10(15) W cm(-2)). We identify elastic large-angle backscattering of electrons at ionic cores in the presence of a laser field as an efficient heating mechanism. Its efficiency as well as the effect of collective electron motion, electron-impact ionization, and cluster charging are studied employing a mean-field classical transport simulation. Results for the absolute x-ray yields are in surprisingly good quantitative agreement with recent experimental results. |
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