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Proceedings Paper

Hot plasma diagnostics during femtosecond laser ablation in a cavity
Author(s): V. M. Gordienko; I. A. Makarov; E. V. Rakov
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Paper Abstract

On-line diagnostics of hot plasma induced by superintense femtosecond laser pulses in a cavity during the deep hole drilling of solid target has been developed. Such a plasma is characterized by higher values of hard X-ray yield and hot electron temperature in comparison with the same parameters measured for flat nearsurface plasma. Dynamics of X-rays yield in the cavity during the deep hole drilling demonstrates several repetitive stages. The yield and energy of X-rays from plasma ignited in a cavity depend on the beam waist position respect to the target surface plane, i.e. focusing regime. We have detected strong second harmonic signal that correlated with hard X-Ray yield in the time of cavity formation. Depth resolved elemental analysis of compound targets, based on this diagnostics technique, has been proposed.

Paper Details

Date Published: 25 April 2007
PDF: 8 pages
Proc. SPIE 6606, Advanced Laser Technologies 2006, 66060S (25 April 2007); doi: 10.1117/12.729640
Show Author Affiliations
V. M. Gordienko, M.V. Lomonosov Moscow State Univ. (Russia)
I. A. Makarov, M.V. Lomonosov Moscow State Univ. (Russia)
E. V. Rakov, M.V. Lomonosov Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 6606:
Advanced Laser Technologies 2006
Dan C. Dumitras; Maria Dinescu; Vitally I. Konov, Editor(s)

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