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J. Phys. IV France
Volume 138, December 2006
Page(s) 55 - 62
Publié en ligne 6 janvier 2007
8e Colloque sur les Sources cohérentes et incohérentes UV, VUV et X : Applications et développements récents
R. Moncorgé et J.L. Doualan
J. Phys. IV France 138 (2006) 55-62

DOI: 10.1051/jp4:2006138007

X-ray generation by laser-cluster interaction

C. Deiss1, N. Rohringer1, J. Burgdörfer1, E. Lamour2, C. Prigent2, J.P. Rozet2 and D. Vernhet2

1  Institute for Theoretical Physics, Vienna University of Technology, 1040 Vienna, Austria
2  INSP, Universités P. et M. Curie et D. Diderot, 140 rue de Lourmel, 75015 Paris, France

(Publié en ligne le 6 janvier 2007)

We investigate the efficient heating of quasi-free electrons during the interaction of short infrared laser pulses with large rare-gas clusters. In the framework of our mean-field classical transport simulation we are able to explain the emission of characteristic x-rays at moderate laser intensities ( ${\rm I}\sim 10^{15}$ Wcm - 2) where the ponderomotive energy of the electrons is by far to low to allow for the creation of inner-shell vacancies. We identify large-angle elastic electron-ion scattering as an important heating mechanism at moderate laser intensities.

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