Open AccessState Selective Measurements of HCI Produced by Strong Ultrashort Laser-Clusters Interaction
Author(s) -
J.P. Rozet,
M. Cornille,
S. Dobosz,
J. Dubau,
J. C. Gauthier,
S. Jacquemot,
Emily Lamour,
M. Lezius,
D. Normand,
Martin Schmidt,
Dominique Vernhet
Publication year - 2001
Publication title -
physica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.415
H-Index - 83
eISSN - 1402-4896
pISSN - 0031-8949
DOI - 10.1238/physica.topical.092a00113
Subject(s) - atomic physics , cluster (spacecraft) , helium , laser , spectroscopy , photon , ion , chemistry , physics , optics , quantum mechanics , computer science , programming language , organic chemistry
International audienceWe have performed studies of keV x-ray production from (Ar)n , (Kr)n and (Xe)n rare gas clusters (with n between 104 and 106 atoms/cluster) submitted to intense (~10^18 W/cm2) infrared (790 nm) laser pulses. We have determined the photon energies and the absolute photon emission yields as a function of several physical parameters governing the interaction : size and atomic number of the clusters, peak intensity of the laser. Up to 10^6 3 keV photons per pulse at a moderate (10^15/cm3) atomic density have been observed. High resolution spectroscopy studies in the case of (Ar)n clusters have also been performed, giving unambiguous evidence of highly charged (up to heliumlike) ions with K vacancies production. The results obtained indicate that X-rays are emitted before cluster explosion on a subpicosecond time scale, and shed some light on the mechanisms involved in the first stage of the production of the nanoplasma induced from each cluster