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Proceedings Paper

Control of femtosecond laser plasma parameters by surface contaminants cleaning with preceding pulse laser
Author(s): Ilya M. Lachko; R. V. Volkov; D. M. Golishnikov; Vyacheslav M. Gordienko; M. S. Dzhidzhoev; B. V. Mar'in; P. M. Mikheev; Andrey B. Savel'ev; Daria S. Uryupina; A. A. Shashkov
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Paper Abstract

Making use of time-of-flight and mass-spectroscopic methods we investigated influence of the film on the target surface at vacuum of 10-5 Torr onto ions emission from plasma created by femtosecond laser pulse with itensity of 2 • 1016 W/cm2. It was shown that the highest energy per charge (8.5 keV) acquire protons, while basic target ions (Si, Ti) gain less energy. Heating by laser nanosecond pulse advancing femtosecond pulse by 0.1 - 100 ms with energy density up to 20 J/cm2 allows for effective surface cleaning due to removal of molecules containing hydrogen, carbon and oxygen. By the contrast to the instantaneous resistive heating the pulsed laser cleaning provides for higher heating temperatures and can be used for any solid targets in the regimes of thermal and plasma cleaning.

Paper Details

Date Published: 10 June 2004
PDF: 10 pages
Proc. SPIE 5482, Laser Optics 2003: Superintense Light Fields and Ultrafast Processes, (10 June 2004); doi: 10.1117/12.558788
Show Author Affiliations
Ilya M. Lachko, M.V. Lomonosov Moscow State Univ. (Russia)
R. V. Volkov, M.V. Lomonosov Moscow State Univ. (Russia)
D. M. Golishnikov, M.V. Lomonosov Moscow State Univ. (Russia)
Vyacheslav M. Gordienko, M.V. Lomonosov Moscow State Univ. (Russia)
M. S. Dzhidzhoev, M.V. Lomonosov Moscow State Univ. (Russia)
B. V. Mar'in, M.V. Lomonosov Moscow State Univ. (Russia)
P. M. Mikheev, M.V. Lomonosov Moscow State Univ. (Russia)
Andrey B. Savel'ev, M.V. Lomonosov Moscow State Univ. (Russia)
Daria S. Uryupina, M.V. Lomonosov Moscow State Univ. (Russia)
A. A. Shashkov, M.V. Lomonosov Moscow State Univ. (Russia)


Published in SPIE Proceedings Vol. 5482:
Laser Optics 2003: Superintense Light Fields and Ultrafast Processes
Vladimir E. Yashin; Alexandr A. Andreev, Editor(s)

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