Study of second harmonic emissions for characterization of laser-plasma X-ray sources

Year: 1998

Authors: Giulietti A., Beneduce C., Ceccotti T., Giulietti D., Gizzi LA., Mildren R.

Autors Affiliation: CNR, Ist Fis Atom & Mol, I-56127 Pisa, Italy;
Univ Pisa, Dipartimento Fis, I-56100 Pisa, Italy

Abstract: An investigation of second harmonic (SH) and X-ray emissions from Al plasmas produced by 3-ns, 1.064-mu m laser pulses at 10(14) W/cm(2) is reported. The SH and X-ray yields are strongly correlated as a function of the target position with respect to the laser beam focus. The SH originates from the underdense coronal plasma and has a filamentary source, while the X-ray source is uniform. The results suggest that, although the X-ray emission is significantly enhanced by the filamentation of the laser light in the corona, there is a smoothing effect in the energy transport process toward the overdense region.


Volume: 16 (2)      Pages from: 397  to: 404

KeyWords: 2nd-harmonic emission; filamentation; generation
DOI: 10.1017/S0263034600011666

Citations: 12
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