Soft-x-ray emission dynamics in picosecond laser-produced plasmas

Year: 2000

Authors: Gizzi LA., Giulietti A., Willi O., Riley D.

Autors Affiliation: CNR, Ist Fis Atom & Mol, Area Ric, I-56010 Pisa, Italy;
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England;
Queens Univ Belfast, Dept Phys, Belfast BT7 1NN, Antrim North Ireland

Abstract: Plasmas were generated by prepulse-free picosecond laser irradiation of solid targets consisting of five different fluorine salts. Picosecond-time-resolved x-ray spectroscopy of K-shell emission from H-like and He-like fluorine was performed to Study the temporal evolution of plasma parameters including electron density and temperature. Measurements show that the fluorine line emission intensity reaches its maximum in a time comparable with the rise time of the laser pulse. This peak is then followed by a decay whose rate depends upon the atomic number of the alkali component of the target. Our measurements show clear evidence of radiation cooling effects in higher-Z targets.


Volume: 62 (2)      Pages from: 2721  to: 2727

KeyWords: laser plasma
DOI: 10.1103/PhysRevE.62.2721

Citations: 8
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